JP7793365B2 - reactor - Google Patents

Description

The present invention relates to a reactor.

A reactor primarily consists of a coil and a core. When current is passed through the coil, it generates magnetic flux according to the number of turns. Hereinafter, the coil that functions as an inductive reactance by generating magnetic flux when current is passed through it from the outside is referred to as the main coil. The core forms a closed magnetic circuit that passes the magnetic flux generated by the coil with a magnetic permeability higher than that of a vacuum. In other words, a reactor is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it.

Such reactors are used in a wide variety of applications. Typical reactors include boost reactors, series reactors, parallel reactors, current-limiting reactors, starting reactors, shunt reactors, neutral reactors, and arc-suppression reactors.

Boost reactors are incorporated into onboard boost circuits, such as those found in the drive systems of hybrid and electric vehicles. Series reactors are connected in series to motor circuits to limit current during short circuits. Parallel reactors stabilize current sharing between parallel circuits. Current-limiting reactors limit current during short circuits and are connected to them. Starting reactors are connected in series to motor circuits to protect the machine and limit starting current. Shunt reactors are connected in parallel to transmission lines to compensate for leading reactive power and suppress abnormal voltages. Neutral reactors are connected between the neutral point and the ground to limit the ground fault current that flows in the event of a ground fault in the power system. Arc-suppression reactors automatically extinguish the arc that occurs when a single-phase ground fault occurs in a three-phase power system.

In such reactors, an auxiliary winding may be provided to detect the reactor's state. The auxiliary winding receives the magnetic flux generated by the main coil and passes a current corresponding to the magnetic flux. By detecting the current value of this auxiliary winding, it can be used, for example, as a sensor to measure the magnetic flux generated by the reactor.

Patent No. 5267802

In recent years, progress in miniaturization of circuits and integration of electrical components has led to a demand for smaller reactors. A reactor consists of a coil attached to a core. To form a closed magnetic circuit, the core has a leg on which the coil is attached, other legs parallel to this leg, and a yoke that sandwiches the legs from both sides to form a closed ring shape. To make reactors smaller, the spacing between the legs is becoming narrower. Furthermore, the core is coated with insulating resin to insulate it from the coil. Therefore, the distance between the resin-coated legs is becoming even narrower.

As reactors become smaller, the task of inserting the auxiliary winding into such a narrow space, wrapping it around the legs, and then pulling it out is becoming more difficult, and there is a risk that the auxiliary winding will not be able to be properly installed without bending.

The present invention was proposed to solve the above problems, and its purpose is to provide a high-quality reactor that allows for easy installation of auxiliary windings.

To achieve the above objective, a reactor according to an embodiment of the present invention comprises a main coil through which current flows from the outside, a core containing a magnetic body and to which the main coil is attached, a core coating resin that coats the core and is interposed between the core and the main coil, an auxiliary winding into which magnetic flux from the main coil enters to generate current, and an auxiliary winding support member separate from the core coating resin that supports the auxiliary winding and is installed in the core coating resin so that the auxiliary winding fits into the core.

The core may have a closed ring shape including multiple legs and a yoke portion connecting the legs, the core coating resin may have a yoke housing portion that covers the yoke portion, and the auxiliary winding may be sandwiched between the yoke housing portion and the auxiliary winding support.

The auxiliary winding support may have annular inner and outer frames and a groove between the inner and outer frames, and the auxiliary winding may be wired in the groove.

The outer frame of the auxiliary winding support may have corners spaced apart from the auxiliary winding.

The auxiliary winding may have a lead wire drawn from the auxiliary winding support and a curved region 180 degrees opposite the lead wire, and the outer frame of the auxiliary winding support may have a wall portion that faces the curved region of the auxiliary winding and regulates the position of the curved region.

This invention allows for easy installation of auxiliary windings, resulting in higher reactor quality.

FIG. 2 is a perspective view showing the main configuration of a reactor. FIG. FIG. 2 is a perspective view showing the entire configuration of the reactor. FIG. 2 is an exploded view of the core coating resin. FIG. 10 is a perspective view of an auxiliary winding support; FIG. 10 is a perspective view showing a state in which the auxiliary winding is set on the auxiliary winding supporter. FIG. 2 is an exploded perspective view of an auxiliary winding support body on which an auxiliary winding is wired, a core coating resin, and a main coil. FIG. 10 is a perspective view of the auxiliary winding support and the core-coating resin assembly.

The reactor according to an embodiment of the present invention will be described below with reference to the drawings. In each drawing, thickness, dimensions, positional relationships, ratios, shapes, etc. may be exaggerated for ease of understanding, but the present invention is not limited to such exaggeration.

Figure 1 is a perspective view showing the main configuration of the reactor of this embodiment. The reactor 1 is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it. The reactor 1 includes a main coil 2, a core 3, and an auxiliary winding 4. The main coil 2 and auxiliary winding 4 are fitted into the core 3. For example, the reactor 1 has three main coils 2 and three auxiliary windings 4 for one core 3.

The main coil 2 is an inductor that generates magnetic flux when current flows from the circuit in which the reactor 1 is incorporated, introducing inductive reactance into the circuit. The main coil 2 is a cylindrically wound body of conductive wire with an insulating coating such as enamel, and is formed by winding it in a spiral shape while shifting the winding position for each turn along the winding axis. The main coil 2 is, for example, a rectangular wire, and is a spiral edgewise coil formed by winding the conductive wire so that the wide surface of the conductive wire extends in a direction perpendicular to the winding axis of the main coil 2. A flatwise coil, for example, can also be used as the main coil 2.

Lead wires 21 are drawn out from the beginning and end of the main coil 2. The lead wires 21 are connected to bus bars (not shown). Bus bars are connecting conductors for connecting to other devices in the circuit, and are long plates with conductors such as copper drawn out. Each lead wire 21 is connected to each bus bar by welding or other means. By connecting the terminals of other devices in the circuit to these bus bars, current can be supplied to the main coil 2 from outside.

To detect the state of the reactor 1, the auxiliary winding 4 receives the magnetic flux generated by the main coil 2 and passing through the core 3, generating an electromotive force corresponding to the magnetic flux and passing a current through an external device connected to the auxiliary winding 4, such as a magnetic sensor. The auxiliary winding 4 is a wound body in which conductive wire is wound approximately 360 degrees for one or more turns, with lead wires 41 at the beginning and end of the winding extending side by side. The auxiliary winding 4 is a round wire with an insulating coating such as enamel coating. The auxiliary windings 4 are arranged in one-to-one correspondence with the main coils 2, and are arranged near the flux-exiting end face of the corresponding main coil 2 to obtain magnetic flux that is less affected by magnetic flux leakage.

The core 3 contains a magnetic material and forms a closed magnetic circuit through which the magnetic flux generated by the main coil 2 passes with a magnetic permeability higher than that of a vacuum. Examples of magnetic materials include powder magnetic cores, ferrite cores, metal composite cores, and laminated steel plates. Powder magnetic cores are annealed compacts made by compressing magnetic powder. Magnetic powders are primarily iron-based, and examples include pure iron powder, iron-based permalloy (Fe-Ni alloy), Si-containing iron alloy (Fe-Si alloy), sendust alloy (Fe-Si-Al alloy), amorphous alloy, nanocrystalline alloy powder, and mixtures of two or more of these powders. Metal composite cores are made by mixing and molding magnetic powder and resin.

Figure 2 is a perspective view of the core 3, with some of the main coils 2 omitted for ease of explanation. The core 3 is a vertical lattice-shaped closed magnetic circuit equipped with a yoke portion 31, fitting legs 32, and connecting legs 33. The yoke portion 31 extends perpendicular to the winding axes of the main coil 2 and auxiliary winding 4, and has a length sufficient to encompass the entire main coil 2. The core 3 is equipped with a pair of yoke portions 31. The pair of yoke portions 31 sandwich the entire main coil 2 from both end faces perpendicular to the winding axis of the main coil 2.

The main coil 2 and auxiliary winding 4 are fitted into the fitting leg portions 32. The fitting leg portions 32 extend between the yoke portions 31 at intervals equal to the number of pairs of main coils 2 and auxiliary windings 4. These fitting leg portions 32 are hollow-core legs within the main coil 2 and consist of a protrusion 32a and a discontinuous area 32b. The protrusions 32a extend from each yoke portion 31 and are made of the same type of magnetic material molded integrally with the yoke portion 31. The auxiliary winding 4 is hung on them and extends into the vicinity of the entrance to the annular surface of the main coil 2. The discontinuous area 32b is between the pair of protrusions 32a; in other words, the fitting leg portions 32 are discontinuous between the protrusions 32a. The connecting legs 33 extend on both sides of the fitting leg portions 32 and connect the pair of yoke portions 31.

However, the fitting leg portion 32 is not limited to this and may extend continuously between the yoke portions 31 without interruption. Furthermore, the fitting leg portion 32 may bridge between the yoke portions 31 and have a magnetic gap that prevents a decrease in inductance. The magnetic gap may be made of a non-magnetic material, ceramic, non-metal, resin, carbon fiber, or a composite material of two or more of these, gap paper, or an air gap.

Figure 3 is a perspective view showing the entire structure of the reactor 1. The core 3 is covered with core coating resin 5, and the main coil 2 and auxiliary winding 4 are attached to the core 3 from above the core coating resin 5. The auxiliary winding 4 is attached to the core 3 by first fixing it to an auxiliary winding support 6, which is separate from the core coating resin 5, and then attaching the auxiliary winding support 6 to the core coating resin 5. An auxiliary winding stopper 55 extends from the core coating resin 5, and engages the lead wire 41 drawn from the attached auxiliary winding 4 to prevent it from coming loose. The auxiliary winding stopper 55 extends in a hook shape, reducing the diameter of the coating layer of the auxiliary winding 4 and fitting it in.

This core coating resin 5 protects the core 3 from mechanical shock and covers at least the areas where the main coil 2 and auxiliary winding 4 are close to the core 3, insulating the core 3 from the main coil 2 and auxiliary winding 4. The auxiliary winding support 6 makes it easy to attach the auxiliary winding 4. Materials for the core coating resin 5 and auxiliary winding support 6 include, for example, epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or a composite of these. The core coating resin 5 is insulating and heat-resistant. A thermally conductive filler may be mixed into the core coating resin 5 and auxiliary winding support 6.

The reactor 1 also includes a terminal block (not shown) for securing the busbar and fastening the busbar to the terminals of an external device. The reactor 1 also includes a case (not shown) that houses the reactor body, which consists of a core 3 covered with a core coating resin 5, and a main coil 2 and auxiliary winding 4 fitted into the core 3. The case is made of a lightweight metal with high thermal conductivity, such as an aluminum alloy, and has heat dissipation properties. The case has a roughly box-like shape with an open top and a closed bottom.

The gap between the reactor body and the case may be filled with a solidified filler. A relatively soft, highly thermally conductive resin is suitable for the filler, in order to ensure the heat dissipation performance of the main coil 2 and core 3 and to reduce vibration transmission from the main coil 2 and core 3 to the case. It is also preferable for the filler to have insulating properties. Examples of such fillers include silicone resin, urethane resin, epoxy resin, and acrylic resin.

Figure 4 is an exploded view of the core coating resin 5. As shown in Figure 4, the core coating resin 5 is composed of a short-leg resin portion 51 and a long-leg resin portion 56. The short-leg resin portion 51 has a yoke housing portion 52 that covers the yoke portion 31. A main coil insertion portion 53 extends from the yoke housing portion 52, covering the fitting leg portion 32 and into which the main coil 2 fits. Furthermore, a connection leg housing portion 54 extends from the yoke housing portion 52, covering the connection leg portion 33.

The long-leg resin part 56 also has a yoke housing part 57 that covers the yoke part 31. A main coil insertion part 58 extends from the yoke housing part 57, covering the fitting leg part 32 and into which the main coil 2 fits. Furthermore, a connection leg housing part 59 extends from the yoke housing part 57, covering the connection leg part 33. In the short-leg resin part 51 and the long-leg resin part 56, the main coil insertion part 53 and connection leg housing part 54 of the short-leg resin part 51 are shorter than the main coil insertion part 58 and connection leg housing part 59 of the long-leg resin part 56.

In the short-leg resin portion 51, main coil insertion portions 53 and connection leg insertion portions 54 are alternately arranged along the extension direction of the yoke insertion portion 52. Furthermore, in the long-leg resin portion 56, main coil insertion portions 58 and connection leg insertion portions 59 are alternately arranged along the extension direction of the yoke insertion portion 57. The short-leg resin portion 51 covers one yoke portion 31 from which the protrusion 32a protrudes with the yoke insertion portion 52 and main coil insertion portion 53. The long-leg resin portion 56 covers the other yoke portion 31 from which the protrusion 32a protrudes with the yoke insertion portion 57 and main coil insertion portion 58. Furthermore, the long-leg resin portion 56 covers the connection leg 33 with the connection leg insertion portion 59. The connection leg 33 is exposed from the tip of the connection leg insertion portion 59 of the long-leg resin portion 56 by the same length as the connection leg insertion portion 54 of the short-leg resin portion 51.

The main coil 2 is then attached to the main coil insertion portion 58 of the long-leg resin portion 56. Next, the main coil insertion portion 53 is butted against the main coil insertion portion 58, and the connection leg portion 33 exposed from the connection leg housing portion 59 is inserted into the connection leg housing portion 54 while the connection leg housing portion 54 is butted against the connection leg housing portion 59, thereby assembling the core 3 into a closed loop. Here, the auxiliary winding 4 passes between the main coil insertion portion 53 of the short-leg resin portion 51 and one of the adjacent connection leg housing portions 54, makes a circuit around the main coil insertion portion 53, and is then pulled out from this main coil insertion portion 53 and the other adjacent connection leg housing portion 54, quickly and with high quality and without slack. The installation process for this auxiliary winding 4 is simplified by using the auxiliary winding support 6.

Figure 5 is a perspective view of the auxiliary winding support 6. As shown in Figure 5, the reactor 1 is equipped with an auxiliary winding support 6 to quickly install the auxiliary winding 4 with high quality and without sagging. The auxiliary winding support 6 is a resin plate separate from the core coating resin 5, which houses the auxiliary winding 4 and is attached to the core coating resin 5 by fitting.

The auxiliary winding support 6 has a flat portion 63, an inner frame 61, an outer frame 62, and a canopy portion 68. The flat portion 63 is a ring-shaped flat plate that is open on the inside. The inner frame 61 rises endlessly around the entire periphery along the inner edge of the flat portion 63, extending perpendicularly from the flat portion 63. The height of the inner frame 61 from the flat portion 63 is at least equal to or greater than the wire diameter of the auxiliary winding 4. The inner frame 61 is roughly rectangular with chamfered edges, and mating claws 67 are formed on part of the wall surface. The mating claws 67 are mating claws that fit into the core coating resin 5 and are elastically deformable and disconnected from the other wall surfaces of the inner frame 61.

The outer frame 62 rises perpendicularly from the flat portion 63 along the outer edge of the flat portion 63 and extends in the same direction as the inner frame 61. The height of the outer frame 62 from the flat portion 63 is at least equal to or greater than the wire diameter of the auxiliary winding 4. The outer frame 62 rises to surround the outer edge of the flat portion 63 on three sides, forming a roughly U-shape. That is, the outer frame 62 has opposing, parallel side walls 621 and a linear U-shaped bottom side wall 622 that extends between the side walls 621 at the ends of the side walls 621 and is perpendicular to the side walls 621. The side walls 621 and the U-shaped bottom side wall 622 are connected by chamfered curved corners 623.

The auxiliary winding support 6 has a groove 64 defined by a flat portion 63, an inner frame 61, and an outer frame 62. The groove 64 has a U-shaped cross section, with the flat portion 63 as the bottom, and one end forming an exposed surface 65 that allows the auxiliary winding 4 to be inserted. A coil stopper 66 that prevents the inserted auxiliary winding 4 from falling out protrudes from the top of the outer frame 62, with the flat portion 63 as its base end. The coil stopper 66 abuts onto the groove 64 from three sides, for example, from two side wall portions 621 and the U-shaped bottom side wall portion 622, protrudes toward the inner frame 61, and extends parallel to the flat portion 63. The coil stopper 66 protrudes enough to allow the auxiliary winding 4 to be inserted between the coil stopper 66 and the inner frame 61 due to the temporary diameter reduction of the auxiliary winding 4.

The eaves portion 68 is a plate surface that crosses the open end of the outer frame 62, which extends in a U-shape along the flat portion 63. This eaves portion 68 rises from the remaining outer edge of the flat portion 63 other than the portion from which the outer frame 62 extends. The eaves portion 68 rises higher than the inner frame 61 and outer frame 62, extends longer than the U-shaped bottom side wall portion 622 of the outer frame 62, and protrudes outward beyond both side wall portions 621 of the outer frame 62. A gap greater than the diameter of the conductor of the auxiliary winding 4 is provided between the inner frame 61 and the eaves portion 68, allowing the auxiliary winding 4 to be wired.

Figure 6 is a perspective view showing the auxiliary winding 4 set on the auxiliary winding support 6. As shown in Figure 6, the auxiliary winding 4 is pushed into the groove 64 from the exposed surface 65 of the auxiliary winding support 6, past the coil stopper 66. Then, starting from the eaves 68 side, the auxiliary winding 4 is wound around the inner frame 61 once, tightening the inner frame 61, creating an annular curved region 42 in the auxiliary winding 4. Because the inside and outside of the outer frame 62 are separated by the curved corners 623, the curved region 42 of the auxiliary winding 4 does not deviate from the corner of the outer frame 62 to the outside of the outer frame 62, accidentally passing through the U-shaped bottom sidewall 622 and the outer surface, preventing the winding radius of the auxiliary winding 4 from expanding.

The lead wire 41 is pulled out from the canopy portion 68 side. 180 degrees opposite this lead wire 41, the curved region 42 of the auxiliary winding 4 attempts to expand toward the outer frame 62, but the U-shaped bottom side wall 622 prevents the curved region 42 from expanding. Therefore, the auxiliary winding 4 is wound at a specified radius and is prevented from expanding radially.

Figure 7 is an exploded perspective view of the auxiliary winding support 6, on which the auxiliary winding 4 is wired, the core covering resin 5, and the main coil 2. As shown in Figure 7, the auxiliary winding support 6 is attached to the main coil insertion portion 53 with the exposed surface 65 on which the auxiliary winding 4 is exposed facing the yoke housing portion 52 of the short-leg resin portion 51. The main coil 2 is also attached to the main coil insertion portion 53 of the short-leg resin portion 51 and the main coil insertion portion 58 of the long-leg resin portion 56. The core 3 is then assembled into a closed loop with the main coil insertion portion 53 of the short-leg resin portion 51 facing the main coil insertion portion 58 of the long-leg resin portion 56, and the connecting leg housing portion 54 of the short-leg resin portion 51 facing the connecting leg housing portion 59 of the long-leg resin portion 56.

Figure 8 is a perspective view after the auxiliary winding support 6 and core coating resin 5 have been assembled. As shown in Figure 8, the auxiliary winding 4 is sandwiched between the yoke housing portion 52 of the core coating resin 5 and the auxiliary winding support 6, and the lead wire 41 is held in the auxiliary winding stopper 55 formed on the core coating resin 5. Being sandwiched between the yoke housing portion 52 and the auxiliary winding support 6 prevents the auxiliary winding 4 from slackening. Furthermore, the U-shaped bottom sidewall portion 622 of the auxiliary winding support 6 restricts the auxiliary winding 4 from expanding beyond the U-shaped bottom sidewall portion 622, preventing the reactor 1 from becoming bulky in a direction perpendicular to the axis of the auxiliary winding 4.

Because the auxiliary winding 4 is located closer to the yoke housing portion 52 of the core coating resin 5 than the main coil 2, the busbar extends above the auxiliary winding 4 and is drawn out to the outside of the reactor 1. However, the auxiliary winding 4 is housed in the auxiliary winding support 6, and the eaves portion 68 of the auxiliary winding support 6 hangs over the auxiliary winding 4. Therefore, the eaves portion 68 isolates the auxiliary winding 4 from the busbar, ensuring insulation between the auxiliary winding 4 and the busbar.

As such, the reactor 1 of this embodiment comprises a main coil 2, a core 3, a core coating resin 5, an auxiliary winding 4, and an auxiliary winding support 6. An external current flows through the main coil 2. The core 3 contains a magnetic material and has the main coil 2 attached to it. The core coating resin 5 coats the core 3 and is located between the core 3 and the main coil 2. The auxiliary winding 4 generates current when magnetic flux from the main coil 2 enters it. The auxiliary winding support 6 supports the auxiliary winding 4 and is installed in the core coating resin 5 so that the auxiliary winding 4 fits into the core 3; it is a separate body from the core coating resin 5.

This eliminates the need to precisely push or pull the auxiliary winding 4 into narrow spaces within the complex core coating resin 5. With this reactor 1, the auxiliary winding 4 is installed on the auxiliary winding support 6, which is separate from the core coating resin 5 and has a simple structure, and installation of the auxiliary winding 4 in the reactor 1 is completed by the simple task of attaching the auxiliary winding support 6 to the core coating resin 5. This makes installation of the auxiliary winding 4 easier and reduces the risk of the auxiliary winding 4 bending, resulting in a higher quality reactor 1.

The auxiliary winding support 6 also has an annular inner frame 61 and outer frame 62, and a groove 64 between the inner frame 61 and outer frame 62. The auxiliary winding 4 is wired in the groove 64. This makes it easy to install the auxiliary winding 4 on the auxiliary winding support 6, as it is only necessary to wind the auxiliary winding 4 around the inner frame 61 while applying tension. This makes installation of the auxiliary winding 4 even easier.

The core 3 has a closed loop shape including multiple legs, such as fitting legs 32 and connecting legs 33, and a yoke portion 31 connecting these legs, and the core coating resin 5 has a yoke housing portion 52 that covers the yoke portion 31. The auxiliary winding 4 is sandwiched between the yoke housing portion 52 and the auxiliary winding support 6. This reduces the risk of the auxiliary winding 4 becoming loose, eliminates the need for a complicated winding method to prevent the auxiliary winding 4 from becoming loose, and enables the auxiliary winding 4 to capture magnetic flux with high precision.

The outer frame 62 of the auxiliary winding support 6 also has curved corners 623 that are spaced apart from the auxiliary winding 4. This prevents the auxiliary winding 4 from protruding from the corners of the outer frame 62 and passing outside the U-shaped bottom sidewall 622 while being wound around the auxiliary winding support 6. This prevents the auxiliary winding 4 from becoming loose. Furthermore, the winding diameter of the auxiliary winding 4 does not increase, preventing the reactor 1 from becoming bulky.

The auxiliary winding 4 also has a lead wire 41 drawn out from the auxiliary winding support 6 and a curved region 42 180 degrees opposite the lead wire 41. The outer frame 62 of the auxiliary winding support 6 faces the curved region 42 of the auxiliary winding 4 and has a U-shaped bottom sidewall 622 that regulates the position of the curved region 42. As a result, even if the curved region 42 attempts to expand toward the outer frame 62, it is prevented by the U-shaped bottom sidewall 622. Therefore, the auxiliary winding 4 is wound at a specified radius and is prevented from expanding in the radial direction, preventing the reactor 1 from becoming bulky.

The above-described embodiments of the present invention are presented as examples and are not limited to the above-described embodiments. The above-described embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. The embodiments and their modifications are included within the scope of the present invention.

REFERENCE SIGNS LIST 1 Reactor 2 Main coil 21 Lead wire 3 Core 31 Yoke portion 32 Fitting leg portion 32a Protrusion portion 32b Disconnection region 33 Connection leg portion 4 Auxiliary winding 41 Lead wire 42 Curved region 5 Core coating resin 51 Short leg resin portion 52 Yoke accommodating portion 53 Main coil insertion portion 54 Connection leg accommodating portion 55 Auxiliary winding stopper 56 Long leg resin portion 57 Yoke accommodating portion 58 Main coil insertion portion 59 Connection leg accommodating portion 6 Auxiliary winding support 61 Inner frame 62 Outer frame 621 Side wall portion 622 U-shaped bottom side wall portion 623 Curved corner portion 63 Flat portion 64 Groove portion 65 Exposed surface 66 Coil stopper 67 Fitting claw 68 Eaves portion

Claims (4)

a main coil to which an external current is applied;
a core including a magnetic material and on which the main coil is mounted;
a core coating resin that coats the core and is interposed between the core and the main coil;
an auxiliary winding into which the magnetic flux of the main coil enters to generate a current;
an auxiliary winding support member separate from the core coating resin, the auxiliary winding being supported by the core coating resin and being disposed in the core coating resin so that the auxiliary winding fits into the core;
Equipped with
The auxiliary winding support includes:
an annular inner frame and an outer frame;
a groove portion between the inner frame and the outer frame;
and
the auxiliary winding is wired in the groove,
the outer frame of the auxiliary winding support has corners spaced apart from the auxiliary winding;
A reactor characterized by the above. a main coil to which an external current is applied;
a core including a magnetic material and on which the main coil is mounted;
a core coating resin that coats the core and is interposed between the core and the main coil;
an auxiliary winding into which the magnetic flux of the main coil enters to generate a current;
an auxiliary winding support member separate from the core coating resin, the auxiliary winding being supported by the core coating resin and being disposed in the core coating resin so that the auxiliary winding fits into the core;
Equipped with
The auxiliary winding support includes:
an annular inner frame and an outer frame;
a groove portion between the inner frame and the outer frame;
and
The auxiliary winding is
Wiring is provided in the groove portion,
a lead wire drawn out from the auxiliary winding support;
a curved region 180 degrees opposite to the lead wire;
and
the outer frame of the auxiliary winding support has a wall portion that faces the curved region of the auxiliary winding and regulates the position of the curved region;
A reactor characterized by the above. The auxiliary winding is
a lead wire drawn out from the auxiliary winding support;
a curved region 180 degrees opposite to the lead wire;
and
the outer frame of the auxiliary winding support has a wall portion that faces the curved region of the auxiliary winding and regulates the position of the curved region;
The reactor according to claim 1 , the core has a closed annular shape including a plurality of legs and a yoke portion connecting the legs,
the core coating resin has a yoke housing portion that covers the yoke portion,
the auxiliary winding is sandwiched between the yoke housing portion and the auxiliary winding support;
The reactor according to any one of claims 1 to 3, characterized in that