JP3393902B2 - Linear / rotary combined stepping motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear rotary composite type stepping motor.

[0002]

2. Description of the Related Art Conventionally, as a motor of this type, a cylindrical three motor is used in U.S. Pat. No. 5,093,596 (Title of the invention: Combined linear rotary direct drive step motor).
Phase VR type linear pulse motor part and hybrid type 3
It is disclosed that a phase rotary step motor part or a VR type three-phase rotary step motor part is arranged side by side in the axial direction, and the output shafts are commonly housed in one housing.

[0003]

However, these have the following problems.

(1) Since the linear motor portion and the rotary motor portion are arranged side by side in the axial direction, the length in the axial direction becomes long.

(2) The stator of the linear motor section is
The stator iron plates and the spacer iron plates are alternately laminated, and when manufacturing the stator core, two types of iron plates must be alternately laminated, and the stator iron plates are each salient poles. It is necessary to bend every other tip of the stator, so that the stator core cannot be easily manufactured.

(3) Three types of iron plates are required: the stator iron plate of the rotary motor part, the stator iron plate of the linear motor part, and the spacer iron plate.

(4) Two stators of the linear motor section and the stator of the rotary motor section are required, and after the winding and connecting work are performed separately, the two stators are combined in the axial direction. Since it is necessary, the workability of assembling the entire motor is poor.

(5) When a permanent magnet is built in the mover side, two types of mover iron cores must be coaxially arranged, so that the structure is complicated and the assembling workability is poor.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to solve the above-mentioned problems and to prevent the length in the axial direction from becoming long and to fix the linear motor part and the rotary motor part. An object of the present invention is to provide a linear-rotary composite type stepping motor that can share the child iron plate and the mover iron core and has excellent workability in assembling the entire motor.

[0010]

The structure of the present invention for solving the above-mentioned problems is a plurality of salient poles arranged radially inward, and the salient poles have inner circumferential surfaces. And a salient pole having a plurality of first stator small teeth formed in the axial direction and a salient pole having a plurality of second stator small teeth formed in the circumferential direction. And a stator having a stator iron core, and supported in the stator so as to be movable in the axial direction and rotatable also in the rotation direction, and to have the first and second stators small on the outer peripheral surface thereof. A linear-rotary composite type stepping motor comprising a mover having a mover iron core formed with a plurality of mover small teeth at equal pitches facing the teeth in the axial direction and the circumferential direction, respectively. It is as follows.

(1) The stator core has a linear m
Each phase number of the rotary motor, k is an integer of 1 or more
When the two are arranged at an equal pitch angle toward the inside
km of the salient poles, the salient poles being the first stator
Salient poles with small teeth and the second stator small teeth
The salient poles are alternately arranged.

[0012] At the same time, the first stator teeth are the salient poles.
Inner as being formed on the peripheral surface, the stator iron plate and collision electrode to form a collision-poles and tooth bottom portion forming the addendum portion of the small teeth are predetermined arranged, the number of phases, the number of salient poles and said Before being decided by a predetermined arrangement
It is formed by rotating and laminating at an angle that is an integral multiple of the equal pitch angle of the salient poles, and is formed in the circumferential direction of the mover core.
The number of small teeth Zr of the moving element is set so as to satisfy the following relationship.
Characterized in that it is made.

Zr = k (mb + a), where b is 1 or more
, A is an odd number satisfying 1 ≦ a <2m when m is an even number
Is a number, and 1 ≦ a <m or m <a <2 when m is an odd number
It is an integer that satisfies m.

(2) In the stator core, m is a linear
The number of phases in the rotor section and n the number of phases in the rotary motor section
2 (m + n) of the protrusions arranged inward.
A pole, and the salient pole is formed with the first stator tooth
The salient pole pair consisting of two salient poles adjacent to each other is
Two adjacent salient poles with second stator teeth
Consists of n pairs of salient poles.

At the same time, the first solid is formed on the inner peripheral surface of the salient pole.
The iron core is formed by a punching die in order to form a small tooth.
The iron plate that forms the
The tip of the first stator small tooth at a predetermined cycle for each extraction
Built in the punching die so as to form a tooth part or a tooth bottom part
In addition, each salient pole part may be provided so that it can appear and disappear.
The dynamic punch can be selectively retracted by the punch controller.
While punching, it is formed by sequentially stacking these
It is characterized by

[0016]

In the linear / rotary composite type stepping motor configured as described above, the salient poles of the linear motor portion and the salient poles of the rotary motor portion are arranged in parallel in one stator, so that the axial direction A composite type stepping motor can be configured without increasing the length of the. Also, since only one stator is required, winding and wiring work can be done only once, and the workability of assembling the entire motor is excellent. In the manufacturing of the stator core, the stator iron plates are rotationally laminated, or the movable punches for each salient pole portion built in the punching die are operated as punches in a predetermined order, or are not operated as punches. Since it can be formed by punching and stacking while controlling the appearance of the stator core, the stator core can be easily manufactured without the need for a plurality of stator iron plate punching dies. Further, since the mover iron core is shared by both linear and rotary, it is not necessary to provide two types of mover parts for the linear motor and the mover part for the rotary motor. ,

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. FIG. 1 shows the linear
FIG. 2 is a vertical sectional view taken along the line II-II of FIG. 1 showing a rotary composite type stepping motor according to an embodiment.

The stepping motor of this embodiment has a phase number m,
The numerical values of the integers k, b, and a are m = 5, k = 1, and b = 1.
4, a = 2, therefore, the number of salient poles is 2 km = 10, and the number of small teeth Zr in the circumferential direction of the moving element is Zr = k (mb + a)
From 72.

In FIG. 1 and FIG. 2, ten salient poles 11, 12, 13, 14, 15, 15, 16, 17, 1 radially arranged inwardly on the stator core 10 of the stator 1.
Of the 8, 19, 20 salient poles 11, 13, 15, 17,
A plurality of first stator small teeth 24 are axially formed on the inner peripheral surface of 19.
A plurality of second stator small teeth 25 are circumferentially formed on the inner peripheral surfaces of the salient poles 12, 14, 16, 18, and 20 (tooth tips 24a, tooth bottoms 24b) at equal pitches. (Tooth tip 25
a, the tooth tips 25b) are formed at equal pitches. Further, stator windings W1, W2, W3, ... W10 are separately wound around the salient poles 11, 12, 13 ,.

The stator 1 is supported by the end brackets 3 and 4 by being screwed with screws (not shown). On the other hand, the mover 2 in the stator 1 is supported by the end brackets 3 and 4 via the bearings 5 and 6 so as to be movable in the axial direction and also rotatable in the rotating direction. The moving element 2 includes a magnetic pole core 22 on the shaft 21.
A ring-shaped permanent magnet 23 sandwiched between a and 22b and the magnetic pole cores 22a and 22b and magnetized in the axial direction is arranged.

On the outer peripheral surfaces of the magnetic pole cores 22a and 22b, the first stator small teeth 24 are opposed to each other at the same pitch in the axial direction and the second stator small teeth 25 are opposed to each other. And a plurality of mover small teeth 26 (tooth tips 26a, root portions 26b corresponding to the first stator small teeth 24, and second stator small teeth 25) at the same pitch in the circumferential direction. A tooth bottom portion 26c) is formed.

FIG. 3 shows a state (shape) of the movable element small teeth 26 formed on the outer peripheral surfaces of the magnetic pole iron cores 22a and 22b as viewed from the side of the stator 1, and the hatched portions are tooth tips. The portion 26a and the non-hatched portion 26b indicate the axial root portion, and 26c indicates the circumferential root portion. The tooth pitch τ in the circumferential direction of the mover small teeth 26 is τ = (360 / Z
r) degrees, and the magnetic pole cores 22a and 22b are combined by being displaced by τ / 2 in the circumferential direction.

As can be seen from FIG. 2, the axial length of the permanent magnets 23 arranged on the moving element 2 is small and the moving element teeth 26 and the magnetic pole iron elements are arranged on the magnetic pole iron core 22a. It is set so that the movable element small teeth 26 disposed on the rotor 22b are axially displaced from each other by ½ of the tooth pitch τ ₀ .
That is, the movable element small teeth 26 disposed on the magnetic pole core 22a.
When the tooth tip portion 26a of the stator small tooth 24 faces the tooth tip portion 24a of the stator small tooth 24, the tooth tip portion 26a of the movable element small tooth 26 disposed on the magnetic pole core 22b is the tooth bottom portion of the stator small tooth 24. It faces 24b.

4 (a) and 4 (b) show an example of the stator iron plate 30 forming the stator core 10, and FIG. 4 (b) is an enlarged view of the portion A of FIG. 4 (a). Is. Figure 4
In (a), the salient pole portions P5 and P9 of the stator iron plate 30 are salient pole portions having a small inner radius dimension and form salient poles 24a of the first stator small teeth 24 in the axial direction. It is a department.
The salient pole portions P1, P3, and P7 are salient pole portions having a large inner radius dimension, and are salient pole portions forming the tooth bottom portion 24b of the first stator small tooth 24 in the axial direction. Salient poles P2, P4
P6, P8, and P10 are the second stator small teeth 25 in the circumferential direction.
And salient pole portions P2, P4, P
The center lines of 6, P8 and P10 are (360 / k) in the circumferential direction.
m), i.e., 72 degrees, at equal pitches, and each of the salient pole portions has six second stator small teeth 25.
Are arranged symmetrically with respect to the center line of each salient pole portion.

FIG. 5 shows that each stator iron plate 30 is rotated twice, that is, twice the equal pitch angle (72 degrees) of the salient pole portions P2, P4, P6, P8 and P10, that is, every 144 degrees. Salient poles 11, 12, 1 formed when laminated
3, ... 20 first and second stator teeth 24, 25
This is the state (shape) seen from the moving element 2 side. The hatched portions indicate the tooth tips 24a and 25a, and the non-hatched portions indicate the tooth bottom portions 24b, 25b.

By the way, the number of small teeth Zr of the mover 2 in the circumferential direction is Zr = k (mb + a), where b is 1
The above integer, a, is an odd number that satisfies 1 ≦ a <2m when m is an even number, and 1 ≦ a <m or m <when m is an odd number.
When the condition that an integer satisfying a <2m is satisfied, the salient pole portions P2, P4, P6, P8, P10 of the stator iron plate 30 having the second stator small teeth 25 in the circumferential direction.
Since they can be evenly arranged as described above, they can be rotationally laminated at an angle of an integral multiple of 72 degrees.

Then, the second stator small teeth 25 of the salient pole 12
Is exactly opposite to the rotor small tooth 26 in the circumferential direction,
The second stator small teeth 25 of the salient poles 14 are offset by 2/5 of the tooth pitch τ with respect to the mover small teeth 26, and the second stator small teeth 25 of the salient poles 16 are 4 / of the tooth pitch τ. 5 offset, salient pole 1
The second stator small tooth 25 of No. 8 is displaced by 6/5 of the tooth pitch τ, that is, 1/5, and the second stator small tooth 25 of the salient pole 20 is
Is 8/5 of the tooth pitch τ, that is, 3/5. Therefore, as shown in FIG. 6, the stator winding W2 is the A phase, the stator winding W8 is the B phase, the stator winding W4 is the C phase, and the stator winding W1.
0 is the D phase and the stator winding W6 is the E phase, the basic step angle is 1/10 of the tooth pitch τ, that is, 0.
A 5-degree rotary 5-phase stepping motor can be constructed.

Further, the thickness of the stator iron plate 30 is set to t ₀ , and the iron plates 30 are rotationally laminated at 144 degrees as described above, so that the stator salient poles 11, 13,
15, 17, 19 are formed with first axial stator small teeth 24 having an axial tooth pitch of m · t _0, that is, 5t ₀ and a tooth tip 24a having a tooth thickness of 2t ₀ . Moreover, when the salient pole 11 is used as a reference, the deviation of the first stator small teeth 24 of the salient pole 13 is 2/5 of the tooth pitch, and the deviation of the small tooth 24 of the salient pole 15 is 4/5 of the tooth pitch. The shift of the small teeth 24 of the salient pole 17 is 6/5, that is, 1/5 of the tooth pitch, and the shift of the small teeth 24 of the salient pole 19 is 8/5, that is, 3/5 of the tooth pitch. Therefore, as shown in FIG. 6, the stator winding W1 is A phase, the stator winding W7 is B phase, the stator winding W3 is C phase, the stator winding W9 is D phase, and the stator winding W5 is E. with phase, it can be constructed of a basic amount of movement t _0/2 linear five-phase stepping motor.

Therefore, the linear / rotary composite type five-phase stepping motor can be constructed, and each of them can be individually driven and controlled.

Further, the stator core 10 can be formed as follows instead of the stator iron plates 30 being rotationally laminated by 144 degrees. That is, FIG.
(E) shows salient pole portions P1, P3, P5, P7, in which the first stator small teeth 24 are formed in the axial direction of the stator core 10.
Stator iron plates 30a, 30b, 30c, 30 having P9
3 shows an example of d and 30e. Here, the salient pole portion P
Second stator small teeth 25 are formed in the circumferential direction on each of P2, P4, P6, P8, and P10. Figure 7 (a)
In (e), the stator iron plates 30a, 30b, ... 3
The tip of each salient pole portion P1, P3, P5, P7, P9 of 0e is built in a punching die (not shown), and is provided so that each salient pole portion P1, P3 ,. With the movable punch, the iron plate is punched out as shown in FIG.
(B), (c), (d), (e), (a), (b),
(C) is punched out in a cyclically repeating order so as to have the shape shown in FIG.
The tip 24 of the first stator small tooth 24 is provided at the tip of P9.
a or the bottom part 24b is formed.

In the stator iron plate 30a shown in FIG. 7 (a), the movable punches 5 and 9 associated with the salient pole portions P5 and P9 are inactivated, and are associated with the other salient pole portions P1, P3 and P7. This is a case where the movable punches 1, 3, 7 are punched out in an operating state, and the tooth tips 24a are formed at the tips of the salient pole portions P5, P9, and the tooth bottom portions are formed at the tips of the salient pole portions P1, P3, P7. Two
4b is formed.

In the stator iron plate 30b shown in FIG. 7 (b), the movable punches 1 and 5 associated with the salient pole portions P1 and P5 are inactivated, and are associated with the other salient pole portions P3, P7 and P9. This is a case where the movable punches 3, 7, 9 are punched out in an operating state, and the tooth tips 24a are formed at the tips of the salient pole portions P1, P5, and the tooth bottoms are formed at the tips of the salient pole portions P3, P7, P9. Two
4b is formed.

Thereafter, similarly, FIG. 7 (c) and FIG.
(D), the stator iron plates 30c, 30d shown in FIG. 7 (e),
30e, as shown in the figure, each salient pole portion P1, P
The movable punches 1, 3, ... 9 related to P3, ... P9 are selectively punched out in the inactive state or the active state, and the predetermined teeth are attached to the tips of the salient pole portions P1, P3 ,. The tip portion 24a or the tooth bottom portion 24b is formed.

Therefore, when the stator core 10 is formed, the stamped stator iron plates 30a, 30b,
By stacking 30c, 30d, and 30e in this order, 1
The first stator small teeth 24 corresponding to the pitch are attached to the salient pole portions P1, P
3, ... Can be formed at the tip of P9.

Next, referring to FIG. 8 to FIG. 10, the stator iron plates 30a and 30 are formed to form the stator iron plate 10.
A procedure for punching b, 30c, 30d and 30e with a punching die and sequentially stacking them will be described.

FIG. 8 is a configuration diagram for controlling the movable punch of the punching die. In the figure, the salient pole portions P1, P2, P5 of the stator iron plate 30 forming the stator core 10 are formed.
... P9 is built in the punching die 31 so as to form the tooth tip portion 24a or the tooth bottom portion 24b of the first stator small tooth 24, and the salient pole portions P1, P3, P5 ...
... The movable punches 1, 3, 5, ... 9 which are capable of projecting and retracting for each P9, that is, capable of projecting and returning, selectively drive each solenoid in the order shown in Fig. 9 by the punch control device 32. , Appearance control. In addition, 32a is a connection electric wire.

FIG. 9 shows the stator iron plates 30a, 30b, 3
9 is a chart showing the relationship between the order of punching and stacking 0c, 30d, 30e and the control state of the movable punches 1, 3, 5 ,. 9
Regarding the operation of, the  mark shows the punching operation state (out) for forming the tooth bottom portion 24b, and the ◯ mark shows the punching operation state (depression) for forming the tooth tip portion 24a.

FIG. 10 shows each of the movable punches 1, 3, 5,
10A is an explanatory diagram for clearly showing the control state of the movable punch 33, which is one of 9 in FIG.
Shows its operating state (out), and FIG. 10 (b) shows its inactive state (since). In FIG. 10, the movable punch 33 is arranged in the punching die 31 so as to be movable in the vertical direction in the figure, and a cam 33 a is formed on the upper surface thereof. It is in contact with a cam member 35 that is driven to the right in the figure.

An ON signal from the punch controller 32 is
When input to the solenoid 34, the solenoid 34
Is urged to drive the cam member 35 to the right. When the ridges of the cam member 35 and the cams 33a of the movable punch 33 come into contact with each other by the driving of the cam member 35, the movable punch 33 projects from the surface of the punching die 31 as shown in FIG. ) The operating state becomes as shown in.

When an OFF signal is input from the punch control device to the solenoid 34, the solenoid 3
4 is deenergized, and the cam member 35 is returned to the left by the returning means (not shown). When the cam member 35 is returned, the peaks of both cams are disengaged from each other, and the movable punch 33 is pulled in from the surface of the punching die 31 by a not-shown returning means to be in the inoperative state shown in FIG. 10 (b). Become.

The stator core 10 has the stator iron plates 30a, 30b, 30 punched out as described above.
c, 30d, 30e according to the stacking order shown in FIG.
It can be formed by sequentially stacking.

Next, in another embodiment of the linear rotary composite type stepping motor of the present invention, the stator core 10 will be described.
FIG. 11 shows an example of the stator iron plate 40 that forms the. Figure 1
1, in the stator iron plate 40, the number of phases of the linear motor part is m = 2, and the number of phases of the rotary motor part is n = 2.
(M + n) = 8 salient pole portions P41, P42, P43, ...
... P48 are arranged at an equal pitch angle of 45 degrees.

In the stator iron plate 40, the salient pole portion P
41 and P42 and P45 and P46 are salient pole portions that form a pair, respectively, and form salient pole portions in which the second stator small teeth 25 are formed in the circumferential direction, and the salient pole portions P43 and P44,
P47 and P48 are salient pole portions that form a pair, and form salient pole portions in which the first stator small teeth 24 are formed in the axial direction. The angle formed by the centers of the second stator small teeth 25 formed on the salient pole portions P41 and P42 is 46.8 degrees, and the angle of the second stator small teeth 25 formed on the salient pole portions P42 and P45 is small. The angle formed by the centers is 131.4 degrees. Also, salient pole P45
And the angle formed by the centers of the second stator small teeth 25 formed on P46 is 46.8 degrees. Further, the number of small teeth Zr of the moving element arranged in the circumferential direction of the moving element (not shown) is 50.

Therefore, assuming that the second stator small tooth 25 of the salient pole portion P41 and the mover small tooth 26 of the mover just face each other, the small tooth 25 of the salient pole portion P42 and the mover small tooth. There is a 2/4 deviation of the tooth pitch (7.2 degrees) from the tooth 26,
When the stator windings wound around the salient pole portions P41 and P42 are energized, they can be connected so as to have polarities different from each other to form one phase. Further, the small teeth 25 of the salient pole portion P45 and the small teeth 26 of the mover are displaced by 1/4 of the tooth pitch, and the small teeth 25 of the salient pole portion P46 and the small teeth 26 of the mover have a tooth pitch of 3 / 4 offset, small teeth 25 of salient poles P45 and P46
The gap between them is 2/4 of the tooth pitch. Therefore, when the stator windings wound around the salient pole portions P45 and P46 are energized, they are connected so as to have polarities different from each other to form one phase, and the structure of the mover is configured as shown in FIGS. By doing so, a two-phase hybrid rotary stepping motor having a basic step angle of 1.8 degrees can be constructed.

FIG. 12 shows the salient pole portion P of the stator iron plate 40.
The tip portions of 43, P44, P47, and P48 are punched so as to become a salient pole portion that periodically forms a tooth tip portion 24a or a salient pole portion that forms a tooth tip portion 24b when the stator iron plate 40 is punched. Each salient pole portion P43, P4 built in the die
The salient poles 41 and 42 formed when punching and stacking the movable punches corresponding to 4, P47, and P48 under the control of the punch control device 32 so as to be in a state of operating as a punch or a state of not operating as a punch. , 4
3, the appearance (shape) of the first and second stator small teeth 24, 25 of the stator 48 is seen from the side of the mover 2.

The hatched portions indicate the respective tooth top portions 24a and 25a, and the unhatched portions indicate the respective tooth bottom portions 24b and 25b. The stator iron plate 4
By setting the thickness of ₀ as t ₀ and stacking as described above, the stator salient poles 43, 44, 47, 48 have a tooth pitch of 2 mt _{0 in the} axial direction, that is, 4 t ₀ , and a tooth thickness of 2 t ₀ . Axial first stator tines 24 are formed. Moreover, when the salient pole 43 is used as a reference, the deviation of the small tooth 24 of the salient pole 44 is 2/4 of the tooth pitch, and the deviation of the small tooth of the salient pole 47 is 1 /.
4. The deviation of the small teeth 24 of the salient pole 48 is 3/4 of the tooth pitch. Therefore, as shown in FIG. 13, the stator winding W41,
By connecting W42, W43, ... W48, a two-phase hybrid linear stepping motor having a basic movement amount t ₀ can be constructed.

As described above, a two-phase linear rotary composite type stepping motor can be constructed in this embodiment. Then, as described above, the adjacent salient poles 41, 4
2; 43, 44; 45, 46; 47, 48 respectively 1
By configuring the phases, the magnetic circuits of each phase can be made independent, and at the same time, the magnetic circuits of the linear motor part and the rotary motor part can be made independent of each other, and the coupling between the phase windings can be reduced. You can

Although the two embodiments described above are for a hybrid type stepping motor, the present invention can be similarly implemented for a VR type stepping motor. The technique of the present invention is not limited to the technique in the above-described embodiment, and may be implemented by means of another aspect having the same function. Further, the technique of the present invention may be modified in various ways within the scope of the above configuration. Can be added.

[0049]

As is apparent from the above description, according to the linear rotary composite type stepping motor of the present invention, the stator iron core is m of the linear rotary motor.
When each phase number, k is an integer of 1 or more,
2 km of the salient poles arranged at equal pitch angles toward each other
And the salient pole has an axially formed first stator tooth.
And a second stator tooth in the circumferential direction.
The salient poles are alternately arranged and the first stator small
Stator iron plate so that teeth are formed on the inner peripheral surface of the salient pole
Is determined by the number of phases, the number of salient poles, and the predetermined arrangement.
By rotating and laminating at an angle that is an integer multiple of the equal pitch angle of
Movement formed in the circumferential direction of the mover core
The number Zr of small child teeth is configured so as to satisfy a predetermined relationship.
Therefore, the length in the axial direction does not become long, and it is linear.
Stator iron plate and mover iron core of motor and rotary motor
The effect that the and can be shared.

In the stator core, m is a linear motor.
Where n is the number of phases in the rotary motor,
2 (m + n) of the salient poles arranged inward
The salient pole has a phase in which the first stator teeth are formed.
The number of salient pole pairs consisting of two adjacent salient poles is m
Of two adjacent salient poles with small stator teeth
The salient pole pair consists of n pairs, and the inner peripheral surface of the salient pole is
An iron plate forming the iron core by a punching die in order to form the first stator small teeth, is built in the punching die at a predetermined cycle for each punching of the iron plate, and the movable punch provided so as to be retractable in each collision very your capital, bread
Punching while selectively appearing and disappearing control by the controller
Since it formed which are sequentially stacked, an effect that does not become the length in the axial direction is long, yet can be shared and a stator iron plates and the mover iron core of the linear motor portion and the rotary motor
Play.

Therefore, the workability of assembling the entire stepping motor is improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a linear / rotary composite type stepping motor of the present invention.

FIG. 2 is a vertical sectional view taken along line II-II of FIG.

FIG. 3 is a development view of a movable element small tooth formed on the outer peripheral surface of the movable element as viewed from the stator side.

FIG. 4 is a view of a stator iron plate forming a stator core, and FIG.
4A is a plan view thereof, and FIG. 4B is an enlarged view of a portion A in FIG. 4A.

5 is a first and second stator small formed when the stator iron plates of FIG. 4 are rotationally laminated by 144 degrees or the stator iron plates of FIG. 7 are sequentially laminated in the lamination order shown in FIG. It is the development view which saw the tooth from the mover side.

FIG. 6 is a connection diagram of a stator winding of the 5-phase linear rotary composite type stepping motor in FIG.

FIG. 7 is a plan view of each stator iron plate forming the stator core, and includes FIGS. 7 (a), 7 (b), 7 (c), and 7 (d).
And FIG.7 (e) is a figure which shows the example which the tooth top part or tooth bottom part which forms a stator small tooth was formed in the front-end | tip of each salient pole part.

FIG. 8 is a configuration diagram for controlling a movable punch contained in a punching die of a stator iron plate.

9 is a chart showing the relationship between the punching stacking order of the stator iron plates used in the control of FIG. 8 and the control state of each movable punch.

10 is an explanatory view showing a control state of a movable punch incorporated in a punching die, FIG. 10 (a) is an operation state diagram thereof, and FIG.
0 (b) is the inactive state diagram.

FIG. 11 is a plan view of a stator iron plate forming a stator core according to another embodiment of the present invention.

12 is formed when the stator iron plates of FIG. 11 are punched in a predetermined order while stacking the movable punches by a punching die in which movable punches are built in for each salient pole portion, and stacked. It is the development view which looked at the 1st and 2nd stator small teeth from the mover side.

13 is a wiring diagram of a stator winding of the two-phase linear rotary composite type stepping motor in FIG.

[Explanation of symbols]

1 Stator 2 Mover 10 Stator core 11, 12, 13, ... 20, 41, 42, 43, ...
48 salient pole 21 shafts 22a, 22b magnetic pole iron core (mover iron core) 23 permanent magnet 24 first stator small teeth 24a, 25a, 26a tooth tip portions 24b, 25b, 26b, 26c tooth bottom portion 25 second stator small Teeth 26 Mover small teeth 30, 30a, 30b, ... 30e, 40 Stator iron plates P11, P12, P13, ... P20, P41, P4
2, P43, ... P48 Salient pole portion W1, W2, W3, ... W10 Stator winding

Continuation of the front page (56) Reference JP-A-54-161008 (JP, A) JP-A-63-310359 (JP, A) JP-A-64-19959 (JP, A) JP-A-58-108948 (JP , A) JP 63-228945 (JP, A) JP 4-229063 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 41/00 H02K 37/00

Claims (2)

(57) [Claims] 1. A plurality of salient poles radially arranged toward the inside, the salient poles having a plurality of first stator small teeth formed in the axial direction on the inner peripheral surface thereof. 2 and a salient pole formed with a plurality of second stator small teeth in the circumferential direction.
A stator having a stator core of any type, and a stator that is axially movable in the stator and rotatable in the rotational direction, and has the first and second outer surfaces on its outer peripheral surface. And a moving element having a moving element core having a plurality of moving element teeth formed at equal pitches in the axial direction and the circumferential direction, respectively, facing the stator small tooth, and the stator core is m is that of a linear rotary motor
Number of each phase, when k is an integer of 1 or more, go inward
2 km of the salient poles arranged at an equal pitch angle
The salient poles are salient poles on which the first stator teeth are formed.
And the salient poles on which the second stator small teeth are formed alternate
And the first stator teeth are arranged on the salient poles.
As formed on the inner peripheral surface, the stator iron plate and collision electrode to form a collision-poles and tooth bottom portion forming the addendum portion of the small teeth are predetermined arranged, the number of phases, the number of salient poles and the predetermined The above depends on the placement
Formed by rotating and laminating at an angle that is an integral multiple of the equal pitch angle of the salient poles, and is formed in the circumferential direction of the mover core.
The number of small teeth Zr of the mover is configured to satisfy the following relationship.
Linear rotary compound type stepping motor characterized by being Zr = k (mb + a), where b is 1 or less
The above integer, a satisfies 1 ≦ a <2m when m is an even number
It is an odd number, and when m is an odd number, 1 ≦ a <m or m <a <
An integer that satisfies 2m 2. A plurality of salient poles radially arranged toward the inside, the salient poles having a plurality of first stator small teeth formed in the axial direction on the inner peripheral surface thereof. 2 and a salient pole formed with a plurality of second stator small teeth in the circumferential direction.
A stator having a stator core of any type, and a stator that is axially movable in the stator and rotatable in the rotational direction, and has the first and second outer surfaces on its outer peripheral surface. And a moving element having a moving element core having a plurality of moving element teeth formed at equal pitches in the axial direction and the circumferential direction, respectively, facing the stator small tooth, and the stator core is m is the number of phases in the linear motor, and n is
When facing the number of phases of the rotary motor, it is arranged inward.
2 (m + n) of the salient poles, the salient poles
Two adjacent salient poles on which the first stator small teeth are formed
M pairs of salient poles are formed to form the second stator small teeth.
There are n pairs of salient poles consisting of two adjacent salient poles.
And an iron plate forming the iron core by a punching die for forming the first stator small teeth on the inner peripheral surface of the salient pole. Is formed in the punching die so as to form a tooth tip portion or a tooth bottom portion of the first stator small tooth at a predetermined cycle for each punching, and is capable of projecting and retracting at each salient pole portion. A linear-rotary composite type stepping motor, characterized in that the movable punch provided is punched while selectively protruding and retracting by a punch control device, and is sequentially laminated.