JP6905448B2 - Axial flux type rotary electric machine - Google Patents

Description

The present invention relates to an axial flux type rotary electric machine.

The axial flux type rotary electric machine has a structure in which the stator and the rotor are arranged so as to face each other at intervals in the axial direction parallel to the rotary axis of the rotary electric machine. The rotor is rotated by a rotating magnetic field generated by the stator.

The stator includes a plurality of stator cores and a plurality of exciting coils wound around the plurality of stator cores, respectively. The plurality of stator cores and the plurality of exciting coils are arranged in the circumferential direction around the rotation axis of the rotor. When a three-phase alternating current is supplied to these exciting coils, a rotating magnetic field is generated around the axis of rotation. The rotor is a disk-shaped member on which magnetic poles are formed. The rotor is rotated about its axis of rotation by a rotating magnetic field generated under the supply of three-phase alternating current.

The plurality of exciting coils include a plurality of U-phase coils in which U-phase alternating current flows, a plurality of V-phase coils in which V-phase alternating current flows, and a plurality of W-phase coils in which W-phase alternating current flows. Including (see Patent Document 1). Since the U-phase alternating current is supplied to the plurality of U-phase coils, the plurality of U-phase coils need to be connected to the plurality of V-phase coils and the plurality of W-phase coils without short-circuiting. Since the V-phase alternating current is supplied to the plurality of V-phase coils, the plurality of V-phase coils need to be connected to the plurality of W-phase coils and the plurality of U-phase coils without short-circuiting. Since the W-phase alternating current is supplied to the plurality of W-phase coils, the plurality of W-phase coils need to be connected to the plurality of U-phase coils and the plurality of V-phase coils without short-circuiting.

JP-A-2007-60794

According to the technique disclosed in Patent Document 1, each of the plurality of exciting coils is formed of individual coil wires that are independent of each other. Therefore, a large number of wiring members are required to electrically connect these exciting coils. The wiring member for the U-phase coil needs to be connected to the U-phase coil so as not to come into contact with the wiring member for the V-phase coil and the W-phase coil. However, since a large number of wiring members for the V-phase coil and the W-phase coil exist in the wiring region of the wiring member for the U-phase coil, the wiring member for the U-phase is used for the V-phase coil and the W-phase coil. Connecting the U-phase wiring member so that it is separated from the wiring member by an appropriate distance requires skillful skill. Therefore, the conventional stator has room for improvement in terms of simplification of the wiring work.

An object of the present invention is to provide an axial flux type rotary electric machine having a stator that can be formed under a simplified wiring operation.

The axial flux type rotary electric machine according to one aspect of the present invention has a rotor that rotates around a predetermined rotation axis and the rotor that is arranged so as to face the rotor in an axial direction parallel to the rotation axis. It includes a stator that forms a rotating magnetic field. The stator is composed of a plurality of stator cores arranged in a ring shape in the circumferential direction around the rotation axis, and a plurality of coil wires formed around the plurality of stator cores and wound around the plurality of stator cores. Including exciting coil. The plurality of exciting coils are electrically connected to each other so that the exciting current of the first phase is passed, and a plurality of first phase coils forming the first phase exciter and the exciting current of the second phase are passed. A plurality of second-phase coils that are electrically connected to each other to form a second-phase exciter and a third-phase exciter are electrically connected to each other so that an exciting current of the third phase flows. Includes a plurality of third phase coils. The plurality of first-phase coils are a coil pair composed of a first pair coil and a second pair coil selected from the plurality of first-phase coils and arranged so as to be adjacent to each other in the circumferential direction, in the circumferential direction from the coil pair . Includes other first phase coils, which are located at distant positions. The first pair coil and the second pair coil are composed of a single common coil wire rod continuous across the first pair coil and the second pair coil. The common coil wire rod is a portion of the plurality of stator cores that forms the first pair coil by being wound around the stator core corresponding to the first pair coil in the first winding direction, and a stator core corresponding to the second pair coil. A portion that forms the second pair coil by being wound in the second winding direction opposite to the first winding direction is integrally provided. The first phase exciter includes a first connection member connected to the coil pair and the other first phase coil so as to electrically connect the coil pair and the other first phase coil to each other. I'm out. The first connection member is arranged so as to extend along the inner peripheral surface or the outer peripheral surface of the annular body formed by the plurality of exciting coils. At least one of both ends of the common coil wire in the coil pair constitutes a connecting end located outside the annular body in the axial direction. The first connection member is arranged so as to be connected to the connection end portion and extend along the outer peripheral surface of the annular body. The plurality of second phase coils include two second phase coils arranged at positions separated from each other in the circumferential direction. The second phase exciter includes a second connection member connected to each of the two second phase coils so as to electrically connect the two second phase coils to each other. The first connection member extends on a first virtual plane orthogonal to the axial direction. The second connection member extends on a second virtual plane parallel to the first virtual plane .

According to the above configuration, since the common coil wire forms a coil pair composed of the first pair coil and the second pair coil arranged so as to be adjacent to each other, a wiring member connecting the first pair coil and the second pair coil is required. Not done. Therefore, unlike the conventional stator having a large number of wiring members connecting two adjacent exciting coils, the above-mentioned stator can have a small number of wiring members. Therefore, the workload associated with the wiring work is reduced and the stator can be formed under simplified wiring work.

The common coil wire is the portion of the plurality of stator cores that forms the first pair coil by being wound around the stator core corresponding to the first pair coil in the first winding direction, and the first with respect to the stator core corresponding to the second pair coil. Since the portion that forms the second pair coil by being wound in the second winding direction opposite to the winding direction is integrally provided, a magnetic pole for rotating the rotor can be formed in the corresponding stator core.

A plurality of first-phase coils to which the first-phase exciting current is supplied, a plurality of second-phase coils to which the second-phase exciting current is supplied, and a plurality of third-phase coils to which the third-phase exciting current is supplied. Is wound around a plurality of stator cores, respectively, so that the exciter is arranged in a ring shape in the circumferential direction around the rotation axis under the supply of exciting currents of the first phase, the second phase, and the third phase. A rotating magnetic pole can be formed on the stator core. As a result, the rotor of the axial flux type rotary electric machine can rotate about the rotation axis.

Since the first connection member extends along the inner peripheral surface or the outer peripheral surface of the annular body formed by the plurality of exciting coils, it does not protrude in the axial direction parallel to the rotation axis. Therefore, the first connection member does not interfere with the rotor located next to the annular body in the axial direction. In addition, the annulus does not grow excessively in the axial direction. Since the other first-phase coils arranged at positions separated from the coil pair in the circumferential direction are connected to the coil pair by the first connection member, the exciting current of the first phase is not only the coil pair but also the circumferential direction from the coil pair. also Ru is supplied in addition to the first phase coil disposed away on.

When the first connecting member extends along the inner peripheral surface of the annular body, it does not project outward in the radial direction of the annular body, so that the radial dimension of the axial flux type rotary electric machine is excessively large. It doesn't become. When the first connecting member is extended along the outer peripheral surface of the annular body, the axial dimension of the axial flux type rotary electric machine is excessive because it does not protrude excessively outward in the radial direction of the annular body. Does not grow to.

Connecting end portions of the common coil wire co Irupea Since located outside of the annular body, the operator can easily access the connection end portion from the outside of the annular body. Therefore, the operator can easily connect the first connection member to the connection end portion. The first connection member used for connecting the first phase coil to which the first phase exciting current is supplied is extended on the first virtual plane orthogonal to the axial direction, and the second phase exciting current is supplied. Since the second connection member used for connecting the second phase coil is extended on the second virtual plane parallel to the first virtual plane, these connection members have a substantially parallel relationship. Can be done. Therefore, the risk of short circuits between these connecting members is very small.

The axial flux type rotary electric machine according to another aspect of the present invention is arranged so as to face a rotor that rotates around a predetermined rotation axis and the rotor so as to face the rotor in an axial direction parallel to the rotation axis. A stator that forms a magnetic field that rotates the The stator is composed of a plurality of stator cores arranged in a ring shape in the circumferential direction around the rotation axis, and a plurality of coil wires formed around the plurality of stator cores and wound around the plurality of stator cores. Including exciting coil. The plurality of exciting coils are electrically connected to each other so that the exciting current of the first phase is passed, and a plurality of first phase coils forming the first phase exciter and the exciting current of the second phase are passed. A plurality of second-phase coils that are electrically connected to each other to form a second-phase exciter and a third-phase exciter are electrically connected to each other so that an exciting current of the third phase flows. Includes a plurality of third phase coils. The plurality of first-phase coils are a coil pair composed of a first pair coil and a second pair coil selected from the plurality of first-phase coils and arranged so as to be adjacent to each other in the circumferential direction, in the circumferential direction from the coil pair. Includes other first phase coils, which are located at distant positions. The first pair coil and the second pair coil are composed of a single common coil wire rod continuous across the first pair coil and the second pair coil. The common coil wire rod is a portion of the plurality of stator cores that forms the first pair coil by being wound around the stator core corresponding to the first pair coil in the first winding direction, and a stator core corresponding to the second pair coil. A portion that forms the second pair coil by being wound in the second winding direction opposite to the first winding direction is integrally provided. The first phase exciter includes a first connection member connected to the coil pair and the other first phase coil so as to electrically connect the coil pair and the other first phase coil to each other. I'm out. The first connection member is arranged so as to extend along the inner peripheral surface or the outer peripheral surface of the annular body formed by the plurality of exciting coils. At least one of both ends of the common coil wire in the coil pair constitutes a connecting end located outside the annular body in the axial direction. The first connection member is arranged so as to be connected to the connection end portion and extend along the outer peripheral surface of the annular body. The connection end of the common coil wire in the coil pair is bent in the axial direction, and the coil wire forming the other first phase coil is a connection bent in the axial direction outside the annular body. The first phase exciter including the end portion includes a first connecting tool that penetrates the first connecting member and the connecting end portion of the common coil wire toward the rotation axis, and the first connecting member. the second connector and the including penetrating and said connecting end portion of the coil wire that forms the other of the first phase coil toward the axis of rotation.

According to the above configuration, both the connection end of the common coil wire of the coil pair and the connection end of the coil wire forming the other first phase coil arranged at positions separated from the coil pair in the circumferential direction are on the rotation axis. Since it is bent in the parallel axial direction, the operator can determine the penetrating direction of the first connecting tool and the second connecting tool in the direction toward the rotation axis. After passing the first connector through the connection end of the first connection member and the coil pair, the operator rotates the annular body around the rotation axis and arranges the other first connector at a position distant from the coil pair in the circumferential direction. The connection end of the coil wire forming the one-phase coil can be arranged at a predetermined connection work position where the connection work is performed. After that, the operator can pass the second connector through the first connecting member and the connecting end of the coil wire forming the other first phase coil arranged at a position separated from the coil pair in the circumferential direction. .. Both of the connecting operations using these connecting tools are operations of penetrating the connecting tool through the connecting end portion and the connecting member toward the rotating shaft at a common connecting work position. Therefore, the operator can connect the connection member and the coil wire by repeating the common work, and can efficiently create the exciting body.

The axial flux type rotary electric machine described above can have a stator formed under a simplified wiring operation.

It is a schematic cross-sectional view of a motor exemplified as an axial flux type rotary electric machine. It is a schematic development perspective view of the motor shown in FIG. It is a schematic development perspective view of the exciting body of the motor shown in FIG. It is a schematic perspective view of the exciting body shown in FIG. It is a schematic front view of the conventional excitable body. It is a schematic plan view of the connection end portion of the exciting body shown in FIG. Another perspective view of the exciter shown in FIG.

FIG. 1 is a schematic cross-sectional view of a motor 900 exemplified as an axial flux type rotary electric machine. FIG. 2 is a schematic developed perspective view of the motor 900. The motor 900 will be described with reference to FIGS. 1 and 2. Terms such as "left" and "right" are used in the following description. These terms are used solely for the purpose of clarifying the description. Therefore, the principles of the embodiments described below are not limited by these terms.

The motor 900 includes a rotating shaft 910, a rotor 920, two stators 100 and 101, and a case 950. The stators 100 and 101 generate a rotating magnetic field. The rotor 920 is rotated around a predetermined rotation axis RAX according to the rotating magnetic field from the stators 100 and 101. The rotary shaft 910 receives a rotational force from the rotor 920 and is rotated around the rotary shaft RAX. The rotor 920 and the stators 100 and 101 face each other in the case 950 in the axial direction parallel to the rotation shaft RAX.

The rotary shaft 910 penetrates the case 950, and both ends of the rotary shaft 910 project out of the case 950. At least one of both ends of the rotary shaft 910 is connected to an external device (not shown) via a belt mechanism or a gear mechanism. The rotation of the rotating shaft 910 is transmitted to the external device, and the external device is driven.

The case 950 includes a right case portion 951 and a left case portion 952. The right case portion 951 is located to the right of the rotor 920. The left case portion 952 is located to the left of the rotor 920. The right case portion 951 and the left case portion 952 are superposed in the axial direction parallel to the rotation shaft RAX to form a storage space in which the rotor 920 and the stators 100 and 101 are housed.

The right case portion 951 includes a right end wall 953, a right peripheral wall 954, and a plurality of connecting pins 955. The right end wall 953 is a plate member forming a substantially circular surface substantially orthogonal to the rotation axis RAX. The right peripheral wall 954 is a cylindrical member substantially coaxial with the rotation axis RAX. The plurality of connecting pins 955 project to the left from the left surface of the right end wall 953. A plurality of small holes (not shown) corresponding to the plurality of connecting pins 955 are bored in the right end edge surface of the right peripheral wall 954. The plurality of connecting pins 955 are inserted into the plurality of small holes of the right peripheral wall 954, respectively. As a result, the right peripheral wall 954 is connected to the right end wall 953.

The left case portion 952 includes a left end wall 956, a left peripheral wall 957, and a plurality of connecting pins (not shown). The left end wall 956 is a plate member forming a substantially circular surface substantially orthogonal to the rotation axis RAX. The left peripheral wall 957 is a cylindrical member substantially coaxial with the rotation axis RAX. The plurality of connecting pins project to the right from the right side of the left end wall 956. A plurality of small holes 958 corresponding to the plurality of connecting pins are bored in the left end edge surface of the left peripheral wall 957. The plurality of connecting pins are inserted into the plurality of small holes 958 of the left peripheral wall 957, respectively. As a result, the left peripheral wall 957 is connected to the left end wall 956.

When the right case portion 951 and the left case portion 952 are overlapped in the axial direction parallel to the rotation axis RAX, the left end edge surface of the right peripheral wall 954 comes into contact with the right end edge surface of the left peripheral wall 957. The rotor 920 rotates on a virtual plane that includes the boundary between the right peripheral wall 954 and the left peripheral wall 957.

The case 950 further includes two bearings 959 that both hold and support the rotating shaft 910. The two bearings 959 are arranged coaxially with the rotating shaft RAX. One of the two bearings 959 is fitted into a through hole formed approximately in the center of the right edge wall 953. The other of the two bearings 959 is fitted into a through hole formed approximately in the center of the left edge wall 956. The rotating shaft 910 penetrates two bearings 959. The rotating shaft 910 is supported by these bearings 959 and can rotate around the rotating shaft RAX.

As shown in FIG. 2, the rotor 920 includes a substantially circular substrate 921 and a plurality of permanent magnets 922. Each of the plurality of permanent magnets 922 is a substantially trapezoidal or substantially fan-shaped magnet plate that narrows toward the rotation axis RAX. The plurality of permanent magnets 922 are fixed to the outer peripheral surface of the substrate 921 and surround the substrate 921. The arrangement of the plurality of permanent magnets 922 is designed so that different magnetic poles (ie, S pole and N pole) are formed alternately in the circumferential direction around the rotation axis RAX. The rotary shaft 910 penetrates substantially the center of the substrate 921. The substrate 921 is fixed to the outer peripheral surface of the rotating shaft 910. Therefore, the rotational force magnetically applied to the rotor 920 can be transmitted to the rotating shaft 910 through the substrate 921.

The stators 100 and 101 are arranged on the right side and the left side of the rotor 920, respectively. That is, the stators 100 and 101 are arranged next to the rotor 920 in the axial direction parallel to the rotation axis RAX. The stators 100 and 101 generate a rotating magnetic field that rotates the rotor 920 around the rotation axis RAX.

The stators 100 and 101 include back yokes 931, 941, electromagnet units 923, 942, and a plurality of fasteners 933, 943, respectively. The back yokes 931, 941 are annular plate members fixed to the right end wall 953 and the left end wall 956 by a plurality of fasteners 933, 943, respectively. The back yokes 931, 941 are substantially coaxial with the rotation axis RAX. The electromagnet unit 923,942 includes a plurality of stator cores 180, 181 and exciter bodies 190, 191 respectively. The plurality of stator cores 180 and 181 are located between the back yokes 931, 941 and the rotor 920, respectively. The plurality of stator cores 180 and 181 are fixed to the back yokes 931, 941 by a plurality of fasteners 933 and 943, respectively. The plurality of stator cores 180 and 181 are arranged in an annular shape in the circumferential direction around the rotation axis RAX. The exciter bodies 190 and 191 include a plurality of exciting coils 171 and 173 formed by coil wires wound around the plurality of stator cores 180, respectively. Similar to the plurality of stator cores 180 and 181, the plurality of exciting coils 171 and 173 formed around the plurality of stator cores 180 are arranged in an annular shape in the circumferential direction around the rotation axis RAX. Therefore, the plurality of exciting coils 171 and 173 form annular bodies 170 and 172 that are substantially coaxial with the rotating shaft RAX, respectively. When a three-phase alternating current is supplied to the annular bodies 170 and 172 as an exciting current, a rotating magnetic field that rotates the rotor 920 around the rotation axis RAX is generated.

FIG. 3 is a schematic developed perspective view of the exciting body 190. Exciting body 190 will be described with reference to FIGS. 1 and 3. The exciter 191 has a structure similar to that of the exciter 190. Therefore, the description of the exciter 190 is incorporated into the exciter 191.

The exciter 190 includes a plurality of conductive structures to which different exciting currents are supplied in each phase. FIG. 3 shows a first-phase exciter 110, a second-phase exciter 120, and a third-phase exciter 130 as a plurality of conductive structures. The exciting current of the first phase (that is, one of the U phase, the V phase and the W phase) is supplied to the first phase exciter 110. The exciting current of the second phase (that is, the other one of the U phase, the V phase and the W phase) different from the first phase is supplied to the second phase exciter 120. The exciting current of the third phase (that is, the remaining one of the U phase, the V phase and the W phase) different from the first phase and the second phase is supplied to the third phase exciter 130.

The first phase exciter 110 forms an arc-shaped conductive path as a whole. It includes four coil pairs 111, 112, 113, 114 and three first wiring members 115, 116, 117. Each of the coil pairs 111, 112, 113, 114 includes two adjacent exciting coils 171 in the annular body 170. The first connection members 115, 116, 117 are connected to the coil pairs 111, 112, 113, 114 and form a conductive path between the coil pairs 111, 112, 113, 114.

The coil pair 111 forms one end of the conductive path of the first phase exciter 110. The coil pair 114 forms the other end of the conductive path of the first phase exciter 110. The coil pairs 111, 112, 113, 114 are separated from each other in the circumferential direction of the rotation axis RAX, and are arranged at substantially equal intervals. The coil pair 112 is arranged between the coil pairs 111 and 113. The coil pair 113 is arranged between the coil pairs 112 and 114. The first connection members 115, 116, and 117 are conductive wires that are curved in an arc shape. The center of curvature of each of the first connecting members 115, 116, 117 substantially coincides with the rotation axis RAX. The first connection member 115 is connected to the coil pairs 111 and 112, and forms a conductive path between the coil pairs 111 and 112. The first connection member 116 is connected to the coil pairs 112 and 113 and forms a conductive path between the coil pairs 112 and 113. The first connection member 117 is connected to the coil pairs 113 and 114 and forms a conductive path between the coil pairs 113 and 114.

The coil pair 111 includes two first-phase coils 141 and 142 adjacent to each other in the circumferential direction around the rotation axis RAX. The coil pair 112 includes two first phase coils 143 and 144 adjacent to each other in the circumferential direction around the rotation axis RAX. The coil pair 113 includes two first-phase coils 145 and 146 adjacent to each other in the circumferential direction around the rotation axis RAX. The coil pair 114 includes two first-phase coils 147,148 adjacent to each other in the circumferential direction around the rotation axis RAX. Each of the first phase coils 141 to 148 corresponds to one of a plurality of exciting coils 171 of the annular body 170. For this embodiment, the first pair of coils is exemplified by one of the first phase coils 141, 143, 145, 147. The second pair coil is exemplified by one of the first phase coils 142, 144, 146, 148.

The operator can wind a single common coil wire 211 to form the coil pair 111 as an edgewise coil. The operator can wind a single common coil wire 212 to form the coil pair 112 as an edgewise coil. The operator can wind a single common coil wire 213 to form the coil pair 113 as an edgewise coil. The operator can wind a single common coil wire 214 to form the coil pair 114 as an edgewise coil.

With respect to the conventional wiring structure between exciting coils, a coil pair consisting of two adjacent exciting coils is formed from two coil wires. Therefore, one wiring member is required to connect two adjacent exciting coils in one coil pair. On the other hand, since the coil pairs 111, 112, 113, 114 are formed from the common coil wire rods 211,212,213,214, respectively, a member corresponding to the conventional wiring member that connects two adjacent exciting coils is not required. .. Therefore, the first phase exciter 110 can be formed by using only three first connection members 115, 116, 117 for connection.

The winding direction of the common coil wire 211 in the first phase coil 141 is opposite to the winding direction of the common coil wire 211 in the first phase coil 142. The winding direction of the common coil wires 212, 213, 214 in the first phase coils 143, 145, 147 coincides with the winding direction of the common coil wires 211 in the first phase coil 141. The winding direction of the common coil wires 212, 213, 214 in the first phase coils 144, 146, 148 coincides with the winding direction of the common coil wires 211 in the first phase coil 142. With respect to this embodiment, the first winding direction is exemplified by the winding direction of the common coils 211,212,213,214 in the first phase coils 141,143,145,147. The second winding direction is exemplified by the winding direction of the common coils 211,212,213,214 in the first phase coils 142,144,146,148.

Like the first phase exciter 110, the second phase exciter 120 includes four coil pairs 121, 122, 123, 124 and three second connection members 125, 126, 127. The coil pairs 121, 122, 123, 124 of the second phase exciter 120 correspond to the coil pairs 111, 112, 113, 114 of the first phase exciter 110, respectively. Similarly, the second connection members 125, 126, 127 of the second phase exciter 120 correspond to the first connection members 115, 116, 117 of the first phase exciter 110. The description of the first phase exciter 110 is incorporated into these corresponding sites.

The coil pair 121 includes two second phase coils 151 and 152 formed from a single common coil wire 221. The coil pair 122 includes two second phase coils 153 and 154 formed from a single common coil wire 222. The coil pair 123 includes two second phase coils 155,156 formed from a single common coil wire 223. The coil pair 124 includes two second phase coils 157,158 formed from a single common coil wire 224. The second phase coils 151 to 158 of the second phase exciter 120 correspond to the first phase coils 141 to 148 of the first phase exciter 110, respectively.

Like the first phase exciter 110, the third phase exciter 130 includes four coil pairs 131, 132, 133, 134 and three third connection members 135, 136, 137. The coil pairs 131, 132, 133, 134 of the third phase exciter 130 correspond to the coil pairs 111, 112, 113, 114 of the first phase exciter 110, respectively. Similarly, the third connection members 135, 136, 137 of the third phase exciter 130 correspond to the first connection members 115, 116, 117 of the first phase exciter 110. The description of the first phase exciter 110 is incorporated into these corresponding sites.

The coil pair 131 includes two third-phase coils 161, 162 formed from a single common coil wire 231. The coil pair 132 includes two phase 3 coils 163 and 164 formed from a single common coil wire 232. The coil pair 133 includes two phase 3 coils 165,166 formed from a single common coil wire 233. The coil pair 134 includes two phase 3 coils 167,168 formed from a single common coil wire 234. The third phase coils 161 to 168 of the third phase exciter 130 correspond to the first phase coils 141 to 148 of the first phase exciter 110, respectively.

FIG. 4 is a schematic perspective view of the exciting body 190. The exciter 190 will be further described with reference to FIGS. 3 and 4.

The operator can align the centers of the first phase exciter 110, the second phase exciter 120, and the third phase exciter 130 with the rotation axis RAX, and superimpose them in the axial direction parallel to the rotation axis RAX. .. As a result, the exciter 190 can be easily assembled.

With respect to the exciter 190 described with reference to FIG. 3, the wiring work is completed when the first phase exciter 110, the second phase exciter 120 and the third phase exciter 130 are made. The operator can then create the exciter 190 by simply stacking the first phase exciter 110, the second phase exciter 120, and the third phase exciter 130 in the axial direction parallel to the rotation axis RAX. .. The exciter 190 can be formed much more easily than the conventional exciter because no wiring work is required after the coil pairs 111-114, 121-124, 131-134 are arranged in an annular shape. ..

As described above, when the first phase exciter 110, the second phase exciter 120 and the third phase exciter 130 are superposed in the axial direction parallel to the rotation axis RAX, the coil pairs 111-114, 121-124, 131 ~ 134 form the annular body 170. At this time, the first connection member 115-117, the second connection member 125-127, and the third connection member 135-137 extend along the outer peripheral surface of the annular body 170. The first connection member 115-117, the second connection member 125-127, and the third connection member 135-137, respectively, are the first connection member 115-117, the second connection member 125-127, and the third connection member 135-137, respectively. Except for both ends of the coil pair, it is slightly separated from the coil pairs 111-114, 121-124, 131-134. Therefore, a short circuit does not occur between the first connection member 115-117, the second connection member 125-127, the third connection member 135-137, and the coil pair 111-114, 121-124, 131-134. With respect to the present embodiment, the first connection member 115-117, the second connection member 125-127, and the third connection member 135-137 extend along the outer peripheral surface of the annular body 170. However, the first phase exciting body 110 so that the first connecting member 115-117, the second connecting member 125-127, and the third connecting member 135-137 extend along the inner peripheral surface of the annular body 170. , The second phase exciter 120 and the third phase exciter 130 may be formed.

The first connection member 115-117, the second connection member 125-127, and the third connection member 135-137 are arc-shaped wires having higher rigidity than the common coil wires 211-214,221-224,231-234. You may. In this case, the overall arcuate shape of each of the first phase exciter 110, the second phase exciter 120, and the third phase exciter 130 is likely to be maintained. As a result, the operator can easily superimpose the first phase exciter 110, the second phase exciter 120, and the third phase exciter 130 in the axial direction parallel to the rotation axis RAX to form the exciter 190. can.

As shown in FIG. 4, the set of the first connecting member 115-117, the set of the second connecting member 125-127, and the set of the third connecting member 135-137 are orthogonal to the rotation axis RAX and are mutually orthogonal to each other. It extends on three parallel virtual planes. That is, the set of the first connection members 115 to 117 extends along the right edge of the outer peripheral surface of the annular body 170. The set of the second connecting members 125 to 127 extends along the left edge of the outer peripheral surface of the annular body 170. The set of the third connecting members 135 to 137 extends between the set of the first connecting members 115 to 117 and the set of the second connecting members 125 to 127. Since the set of the third connection member 135-137 is slightly separated from the set of the first connection member 115-117 and the set of the second connection member 125-127, a short circuit does not occur between them.

The coil pair 121 of the second phase exciter 120 is arranged between the coil pair 111 of the first phase exciter 110 and the coil pair 131 of the third phase exciter 130. The coil pair 122 of the second phase exciter 120 is arranged between the coil pair 112 of the first phase exciter 110 and the coil pair 132 of the third phase exciter 130. The coil pair 131 of the third phase exciter 130 is arranged between the coil pair 113 of the first phase exciter 110 and the coil pair 133 of the third phase exciter 130. The coil pair 124 of the second phase exciter 120 is arranged between the coil pair 114 of the first phase exciter 110 and the coil pair 134 of the third phase exciter 130. The winding direction of the exciting coil 141,151,161,143,153,163,145,155,165,147,157,167 is the exciting coil 142,152,162,144,154,164,146,156,166. , 148, 158, 168, which are opposite to the winding direction and different in the winding direction, exciting coils 141, 142, 151, 152, 161, 162, 143, 144, 153, 154, 163, 164, 145. , 146,155,156,165,166,147,148,157,158,167,168 are arranged alternately. Therefore, when the first-phase exciting current, the second-phase exciting current, and the third-phase exciting current are supplied to the first-phase exciting body 110, the second-phase exciting body 120, and the third-phase exciting body 130, respectively. , A rotating magnetic field is generated from the stators 100 and 101.

<Comparison with conventional exciter>
FIG. 5 is a schematic front view of the conventional exciter 800. The conventional exciter 800 will be described with reference to FIG.

The exciter 800 includes four coil pairs 810, four coil pairs 820, and four coil pairs 830. The exciting current of the first phase (ie, one of the U phase, the V phase and the W phase) is supplied to the four coil pairs 810. The exciting current of the second phase (that is, the other one of the U phase, the V phase and the W phase) different from the first phase is supplied to the four coil pairs 820. The exciting current of the third phase (that is, the remaining one of the U phase, the V phase and the W phase) different from the first phase and the second phase is supplied to the four coil pairs 830.

Each of the four coil pairs 810 contains two adjacent exciting coils 811. Each of the four coil pairs 820 contains two adjacent exciting coils 821. Each of the four coil pairs 830 includes two adjacent exciting coils 831.

FIG. 5 shows four wiring members 812 arranged corresponding to each of the four coil pairs 810. Each of the four wiring members 812 is connected to two exciting coils 811 of each of the four coil pairs 810. The exciting current of the first phase supplied to one of the two exciting coils 811 can flow to the other of the two exciting coils 811 through the connecting member 812.

FIG. 5 shows four wiring members 822 arranged corresponding to each of the four coil pairs 820. Each of the four wiring members 822 is connected to two exciting coils 821 of each of the four coil pairs 820. The exciting current of the second phase supplied to one of the two exciting coils 821 can flow to the other of the two exciting coils 821 through the connection member 822.

FIG. 5 shows four wiring members 832 arranged corresponding to each of the four coil pairs 830. Each of the four connecting members 832 is connected to two exciting coils 831 of each of the four coil pairs 830. The exciting current of the third phase supplied to one of the two exciting coils 831 can flow to the other of the two exciting coils 831 through the connecting member 832.

The four coil pairs 810 are separated from each other in the circumferential direction around the rotation axis RAX. FIG. 5 shows three wiring members 813. The three wiring members 813 are used to connect these coil pairs 810. The exciting current of the first phase supplied to one of the four coil pairs 810 can flow to the other coil pair 810 through these connecting members 813.

Like the four coil pairs 810, the four coil pairs 820 are spaced apart from each other in the circumferential direction around the rotation axis RAX. Similarly, the four coil pairs 830 are spaced apart from each other in the circumferential direction around the rotation axis RAX. FIG. 5 shows three wiring members 823 used for connecting the four coil pairs 820 and three wiring members 833 used for connecting the four coil pairs 830. The exciting current of the second phase supplied to one of the four coil pairs 820 can flow to the other coil pair 820 through these connecting members 823. The exciting current of the third phase supplied to one of the four coil pairs 830 can flow to the other coil pair 830 through these connecting members 833.

Unlike the above-mentioned annular body 170, which is connected using a total of nine first connection members 115-117, a second connection member 125-127, and a third connection member 135-137, a total of 21 connection members 812 and 815,822,823,823,833 are required for the formation of the exciter 800. Therefore, the worker needs to perform the wiring work many times. In addition, these connecting members 812, 833, 822, 823, 823, 833 are inevitably densely packed. Maintaining the gap between these wiring members 812, 815, 822, 823, 823, 833 requires highly skilled wiring techniques. On the other hand, with respect to the above-mentioned exciting body 100, the nine first connecting members 115 to 117, the second connecting members 125 to 127, and the third connecting members 135 to 137 are arranged in an orderly manner on the outer peripheral surface of the annular body 170. The operator can perform the wiring work that is much simpler than the conventional wiring work to form the exciting body 190.

The operator who creates the exciter 800 described with reference to FIG. 5 first uses the connection members 812, 822, 832 to set two exciting coils 811, two exciting coils 821, and two. It is necessary to connect a set of exciting coils 831 to form four coil pairs 810, four coil pairs 820 and four coil pairs 830. Next, the operator needs to arrange these coil pairs 810, 820, 830 in an annular shape as shown in FIG. The operator uses the three wiring members 813 to connect the four coil pairs 810, the three wiring members 823 to connect the four coil pairs 820, and the three wiring members 833 to connect the four coil pairs. It is necessary to connect 830. The operator maintains the annular arrangement of the coil pairs 810, 820, 830 and the formation of the coil pairs 810, 820, 830 during the wiring work after the coil pairs 810, 820, 830 are arranged in an annular shape. Therefore, these connection members 815,823,833 must be connected while avoiding contact with the already connected connection members 812,822,832. Therefore, the wiring work of the connecting members 815,823,833 requires the operator to have a very skilled wiring skill. On the other hand, with respect to the above-mentioned exciting body 100, the operator forms the first-phase exciting body 110, the second-phase exciting body 120, and the third-phase exciting body 130, and then superimposes them in the axial direction parallel to the rotation axis RAX. The exciter 100 can be created just by combining them. Therefore, the exciter 100 can be created under a production operation that is much simpler than the conventional production operation.

<Other features>
The designer can give various features to the above-mentioned exciter 190. The features described below do not limit any of the design principles of the exciter 190 described above.

(Connection end)
As shown in FIG. 3, the common coil wire 211 forming the coil pair 111 of the first phase exciter 110 protrudes from the outer peripheral surface of the annular body 170 and is bent in the axial direction parallel to the rotation axis RAX. Includes ends 311, 312. The connection ends 311, 312 form both ends of the common coil wire 211. The common coil wire 212 forming the coil pair 112 of the first phase exciter 110 includes two connecting ends 313,314 protruding from the outer peripheral surface of the annular body 170 and bent in the axial direction parallel to the rotation axis RAX. The connection ends 313 and 314 form both ends of the common coil wire 212. The common coil wire 213 forming the coil pair 113 of the first phase exciter 110 includes two connecting ends 315,316 protruding from the outer peripheral surface of the annular body 170 and bent in the axial direction parallel to the rotation axis RAX. The connection ends 315 and 316 form both ends of the common coil wire 213. The common coil wire 214 forming the coil pair 114 of the first phase exciter 110 includes two connecting ends 317,318 protruding from the outer peripheral surface of the annular body 170 and bent in the axial direction parallel to the rotation axis RAX. The connection ends 317 and 318 form both ends of the common coil wire 214.

Both ends of the first connection member 115 are connected to the connection ends 312 and 313, respectively. Both ends of the first connection member 116 are connected to the connection ends 314 and 315, respectively. Both ends of the first connection member 117 are connected to the connection ends 316 and 317, respectively. Therefore, the exciting current of the first phase can be supplied to the coil pairs 111 to 114 through the first connection members 115 to 117.

With respect to the second phase exciter 120, the common coil wire 221 forming the coil pair 121 includes two connecting ends 321 and 322. The common coil wire 222 forming the coil pair 122 includes two connecting ends 323,324. The common coil wire 223 forming the coil pair 123 includes two connecting ends 325,326. The common coil wire 224 forming the coil pair 124 includes two connecting ends 327,328.

The connection ends 321 and 322 of the common coil wire 221 of the second phase exciter 120 correspond to the connection ends 311, 312 of the common coil wire 211 of the first phase exciter 110, respectively. The connection ends 323 and 324 of the common coil wire 222 of the second phase exciter 120 correspond to the connection ends 313 and 314 of the common coil wire 212 of the first phase exciter 110, respectively. The connection ends 325 and 326 of the common coil wire 223 of the second phase exciter 120 correspond to the connection ends 315 and 316 of the common coil wire 213 of the first phase exciter 110, respectively. The connection ends 327 and 328 of the common coil wire 224 of the second phase exciter 120 correspond to the connection ends 317 and 318 of the common coil wire 214 of the first phase exciter 110, respectively. The description of the first phase exciter 110 is incorporated into these corresponding sites.

Both ends of the second connection member 125 are connected to the connection ends 322 and 323, respectively. Both ends of the second connection member 126 are connected to the connection ends 324 and 325, respectively. Both ends of the second connection member 127 are connected to the connection ends 326 and 327, respectively. Therefore, the exciting current of the second phase can be supplied to the coil pairs 121 to 124 through the second connection member 125 to 127.

With respect to the third phase exciter 130, the common coil wire 231 forming the coil pair 131 includes two connecting ends 331 and 332. The common coil wire 232 forming the coil pair 132 includes two connecting ends 333, 334. The common coil wire 233 forming the coil pair 133 includes two connecting ends 335,336. The common coil wire 234 forming the coil pair 134 includes two connecting ends 337,338.

The connection ends 331 and 332 of the common coil wire 231 of the third phase exciter 130 correspond to the connection ends 311, 312 of the common coil wire 211 of the first phase exciter 110, respectively. The connection ends 333 and 334 of the common coil wire 232 of the third phase exciter 130 correspond to the connection ends 313 and 314 of the common coil wire 212 of the first phase exciter 110, respectively. The connection ends 335 and 336 of the common coil wire 233 of the third phase exciter 130 correspond to the connection ends 315 and 316 of the common coil wire 213 of the first phase exciter 110, respectively. The connection ends 337 and 338 of the common coil wire 234 of the third phase exciter 130 correspond to the connection ends 317 and 318 of the common coil wire 214 of the first phase exciter 110, respectively. The description of the first phase exciter 110 is incorporated into these corresponding sites.

Both ends of the third connection member 135 are connected to the connection ends 332 and 333, respectively. Both ends of the third connection member 136 are connected to the connection ends 334 and 335, respectively. Both ends of the third connection member 137 are connected to the connection ends 336 and 337, respectively. Therefore, the exciting current of the third phase can be supplied to the coil pairs 131 to 134 through the third connection member 135 to 137.

FIG. 6 is a schematic plan view of the connection end portion 340 representing each of the connection end portions 313-1318, 321-328, and 331-338. The connection end 340 will be described with reference to FIGS. 3 and 6. The description of the connection end 340 is incorporated into each of the connection ends 31-1318, 3213-228, and 331-338.

Three through holes 341, 342, 343 are formed at the connecting end 340. These through holes 341, 342, and 343 are aligned in the axial direction parallel to the rotation axis RAX and penetrate the connection end portion 340 toward the rotation axis RAX. The through hole 341 is located on the rightmost side of these through holes 341, 342 and 343. The through hole 342 is located on the leftmost side of these through holes 341, 342 and 343. The through hole 343 is located between the through holes 341 and 342.

FIG. 6 conceptually shows three virtual planes PL1, PL2, PL3 orthogonal to the rotation axis RAX. These virtual planes PL1, PL2, and PL3 are parallel to each other and are set at different positions in the axial direction parallel to the rotation axis RAX. The first connection members 115 to 117 of the first phase exciter 110 extend on the virtual plane PL1. The second connection member 125-127 of the second phase exciter 120 extends on the virtual plane PL2. The third connection member 135-137 of the third phase exciter 130 extends on the virtual plane PL3. Similar to the first connection members 115 to 117 of the first phase exciter 110, the through hole 341 is located on the virtual plane PL1. Similar to the second connection member 125-127 of the second phase exciter 120, the through hole 342 is located on the virtual plane PL2. Similar to the third connection member 135-137 of the third phase exciter 130, the through hole 343 is located on the virtual plane PL3. For this embodiment, the first virtual plane is exemplified by the virtual plane PL1. The second virtual plane is exemplified by the virtual plane PL2.

As shown in FIG. 3, the first phase exciter 110 includes a plurality of couplers 118 (FIG. 3 shows four couplers 118). These connecting tools 118 penetrate through the connection end portion 340 (that is, any of the connection end portions 311 to 318) corresponding to both ends of each of the first connection members 115 to 117 and both ends of each of the first connection members 115 to 117. It penetrates the hole 341. As a result, both ends of each of the second connection members 125-127 are fixed to the corresponding connection ends 340. For this embodiment, the first connector is exemplified by one of a plurality of connector 118s. The second connector is exemplified by the other one of the plurality of connectors 118.

Similar to the first phase exciter 110, the second phase exciter 120 and the third phase exciter 130 include couplers 128 and 138, respectively. Regarding the second phase exciter 120 and the third phase exciter 130, the connection using the connecting tools 128 and 138 (between the second connection member 125-127 and the third connection member 135-137 and the connection end 340). Consolidation) is performed. The wiring structure of the first phase exciter 110 is incorporated into the wiring structure of the second phase exciter 120 and the third phase exciter 130. However, unlike the connector 118 of the first phase exciter 110, the connector 128 of the second phase exciter 120 is arranged at a position penetrating the through hole 342 of the connection end 340. The connector 138 of the third phase exciter 130 is arranged at a position penetrating the through hole 343 of the connection end 340, unlike the connector 118 of the first phase exciter 110. The rivet can be suitably used as a connector 118, 128, 138.

The operator can rotate the first-phase exciter 110 to the third-phase exciter 130 around the rotation axis RAX, and set the penetrating work portions of the couplers 118, 128, and 138 at predetermined positions. All of the connecting members 118, 128, and 138 pass through the connecting end portion 340 and the first connecting member 115-117, the second connecting member 125-127, and the third connecting member 135-137 toward the rotating shaft RAX. The connectors 118, 128, and 138 are attached according to a fixed work procedure. Therefore, the operator can efficiently fix the first connection member 115 to 117, the second connection member 125 to 127, and the third connection member 135 to 137 to the connection end portion 340.

The connection end 340 can also be used to connect to a power line used to supply power to the exciter 190. The first phase exciter 110 includes a substantially L-shaped connecting end member 119 connected to a power line through which an exciting current of the first phase flows. The second phase exciter 120 includes a substantially L-shaped connecting end member 129 connected to a power line through which an exciting current of the second phase flows. The third phase exciter 130 includes a substantially L-shaped connecting end member 139 connected to a power line through which an exciting current of the third phase flows.

One of the plurality of connecting tools 118 is inserted into the through hole 343 of the connecting end portion 311 to fix the connecting end member 119 to the connecting end portion 311. One of the plurality of connecting tools 128 is inserted into the through hole 343 of the connecting end portion 321 to fix the connecting end member 129 to the connecting end portion 321. One of the plurality of connecting tools 138 is inserted into the through hole 343 of the connecting end portion 331, and the connecting end member 139 is fixed to the connecting end portion 331. The attachment of the connecting ends 119, 129, 139 to the connecting ends 311, 321 and 331 is performed by attaching the first connecting member 115 to 117, the second connecting member 125 to 127 and the third connecting member 135 to the connecting end 340. It can be performed in the same procedure as the installation of 137. Therefore, the connecting ends 119, 129, 139 can be efficiently fixed to the connecting ends 311, 321, 331.

(Y connection)
FIG. 7 is another perspective view of the exciter 190. The Y connection of the exciter 190 will be further described with reference to FIGS. 3, 6 and 7.

As shown in FIG. 3, the second phase exciter 120 includes additional wiring members 421 and 422 (ie, Y connections) that connect the neutral points. The connection member 421 extends along the outer peripheral surface of the annular body 170 from the connection end portion 328 of the second phase exciter body 120 to the connection end portion 338 of the third phase exciter body 130. FIG. 7 shows two connecting tools 423 and 424 penetrating both ends of the connecting member 421, respectively. The connecting tools 423 and 424 are inserted into the through holes 342 of the connecting end 328 and the through holes 342 of the connecting end 338, respectively, and the connecting member 421 is connected to the connecting ends 328 and 338, respectively. The connecting member 422 extends along the outer peripheral surface of the annular body 170 in the direction opposite to that of the connecting member 421. FIG. 7 shows two connecting tools 425 and 426 penetrating both ends of the connecting member 422, respectively. The connecting tool 425 penetrates one end of the connecting member 422 and is inserted into the through hole 341 of the connecting end 328. The connector 426 penetrates the other end of the connection member 422 and is inserted into the through hole 341 of the connection end 318 of the first phase exciter 110. As a result, both ends of the connection member 422 are fixed to the connection ends 318 and 328 of the first phase exciter 110 and the second phase exciter 120.

For the above embodiments, the motor 900 has two stators 100, 101. However, the rotary electric machine may use one stator to rotate the rotor. The principle of this embodiment is not limited to how many stators are incorporated in the rotary electric machine.

The principle of the above-described embodiment can be applied to various technical fields in which an axial flux type rotary electric machine is used.

100, 101 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・································································································
120 ······························································································· 3-phase exciter 141-148 ..... 1-phase coil (1st pair coil or 2nd pair coil)
151-158 ..... 2nd phase coil 161-168 ............ 3rd phase coil 170,172 .....・ ・ ・ ・ ・ ・ ・ ・ Exciting coil 180,181 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
313-1318 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Connection end 340 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Connection end 900 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・)
920 ······································································ Plane RAX ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rotation axis

Claims (2)

Axial flux type rotary electric machine
A rotor that rotates around a predetermined axis of rotation, and
A stator, which is arranged so as to face the rotor in an axial direction parallel to the rotation axis and forms a magnetic field for rotating the rotor, is provided.
The stator is composed of a plurality of stator cores arranged in a ring shape in the circumferential direction around the rotation axis, and a plurality of coil wires formed around the plurality of stator cores and wound around the plurality of stator cores. Including exciting coil,
The plurality of exciting coils are electrically connected to each other so that the exciting current of the first phase is passed, and a plurality of first phase coils forming the first phase exciter and the exciting current of the second phase are passed. A plurality of second-phase coils that are electrically connected to each other to form a second-phase exciter and a third-phase exciter are electrically connected to each other so that an exciting current of the third phase flows. Including a plurality of third-phase coils and
The plurality of first-phase coils are a coil pair composed of a first pair coil and a second pair coil selected from the plurality of first-phase coils and arranged so as to be adjacent to each other in the circumferential direction, and the coil pair in the circumferential direction. Including other first phase coils, which are located distant from each other,
The first pair coil and the second pair coil are composed of a single common coil wire rod continuous across the first pair coil and the second pair coil.
The common coil wire rod is a portion of the plurality of stator cores that forms the first pair coil by being wound around the stator core corresponding to the first pair coil in the first winding direction, and a stator core corresponding to the second pair coil. and a portion forming the second Peakoiru by being wound around the second winding direction of the first winding direction opposite possess integrally with,
The first phase exciter includes a first connection member connected to the coil pair and the other first phase coil so as to electrically connect the coil pair and the other first phase coil to each other. ,
The first connection member is arranged so as to extend along the inner peripheral surface or the outer peripheral surface of the annular body formed by the plurality of exciting coils.
At least one of both ends of the common coil wire in the coil pair constitutes a connecting end located outside the annular body in the axial direction.
The first connection member is connected to the connection end and is arranged so as to extend along the outer peripheral surface of the annular body on a first virtual plane orthogonal to the axial direction.
The plurality of second phase coils include two second phase coils arranged at positions separated from each other in the circumferential direction.
The second phase exciter includes a second connection member each connected to the two second phase coils so as to electrically connect the two second phase coils to each other.
The second connection member is an axial flux type rotary electric machine extending on a second virtual plane parallel to the first virtual plane. Axial flux type rotary electric machine
A rotor that rotates around a predetermined axis of rotation, and
A stator, which is arranged so as to face the rotor in an axial direction parallel to the rotation axis and forms a magnetic field for rotating the rotor, is provided.
The stator is composed of a plurality of stator cores arranged in a ring shape in the circumferential direction around the rotation axis, and a plurality of coil wires formed around the plurality of stator cores and wound around the plurality of stator cores. Including exciting coil,
The plurality of exciting coils are electrically connected to each other so that the exciting current of the first phase is passed, and a plurality of first phase coils forming the first phase exciter and the exciting current of the second phase are passed. A plurality of second-phase coils that are electrically connected to each other to form a second-phase exciter and a third-phase exciter are electrically connected to each other so that an exciting current of the third phase flows. Including a plurality of third-phase coils and
The plurality of first-phase coils are a coil pair composed of a first pair coil and a second pair coil selected from the plurality of first-phase coils and arranged so as to be adjacent to each other in the circumferential direction, and the coil pair in the circumferential direction. Including other first phase coils, which are located distant from each other,
The first pair coil and the second pair coil are composed of a single common coil wire rod continuous across the first pair coil and the second pair coil.
The common coil wire rod is a portion of the plurality of stator cores that forms the first pair coil by being wound around the stator core corresponding to the first pair coil in the first winding direction, and a stator core corresponding to the second pair coil. A portion that forms the second pair coil by being wound in the second winding direction opposite to the first winding direction is integrally provided.
The first phase exciter includes a first connection member connected to the coil pair and the other first phase coil so as to electrically connect the coil pair and the other first phase coil to each other. ,
The first connection member is arranged so as to extend along the inner peripheral surface or the outer peripheral surface of the annular body formed by the plurality of exciting coils.
At least one of both ends of the common coil wire in the coil pair constitutes a connecting end located outside the annular body in the axial direction.
The first connection member is arranged so as to be connected to the connection end portion and extend along the outer peripheral surface of the annular body.
The connection end of the common coil wire in the coil pair is bent in the axial direction.
The coil wire forming the other first phase coil includes a connecting end portion that is bent in the axial direction on the outside of the annular body.
The first phase exciter includes a first connecting tool that penetrates the first connecting member and the connecting end portion of the common coil wire toward the rotation axis, the first connecting member, and the other first. An axial flux type rotary electric machine including a second connecting tool that penetrates the connection end portion of the coil wire rod forming a phase coil toward the rotating shaft.

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