JP2010178583A - Claw-pole type motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a claw-pole type motor with high heat radiation. <P>SOLUTION: The claw-pole type motor 200 includes a first core 12 having a plurality of claws on a circumference thereof; a second core 16 arranged to face the first core 12; and a ring-shaped coil 14 sandwiched between the first core 12 and the second core 16. Further, the claw-pole type motor includes a first insulator 13 disposed between the first core 12 and the ring-shaped coil 14 and a second insulator 15 disposed between the second core 16 and the ring-shaped coil 14 as well as a wedge member for pressing the ring-shaped coil 14. By assembling the first core 12, the second core 16, the first insulator 13, the second insulator 15, the ring-shaped coil 14 and an inner ring 17, the inner ring 17 presses the ring-shaped coil 14 to press the insulator 13 or the second insulator 15 against the first core 12 or the second core 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for improving heat dissipation of a stator by devising a coil used for a claw pole type motor.

In recent years, motors for obtaining driving force of vehicles have been actively developed. This is because there is an increasing need to drive a vehicle by the driving force of a motor such as a hybrid vehicle or an electric vehicle.
However, in order to obtain the driving force of the car with a motor, the motor is required to have a high output. And in order to mount in-vehicle, miniaturization of a motor is essential. In particular, a hybrid vehicle is required to be miniaturized because a motor and an engine need to be arranged in an engine room.
Therefore, a small and high-power motor is eagerly desired. However, in order to reduce the size and increase the output of the motor, it is necessary to increase the current flowing through the coil.

Patent Document 1 discloses a technique regarding a stator structure of an electric motor.
By inserting a pressing member formed of a non-magnetic material such as resin that presses the coil into each slot of the stator, heat can be efficiently radiated from the coil.
Patent Document 2 discloses a technique related to an iron core coil of an electric motor.
After the iron core is inserted into the center of the coil bundle formed outside, the outer periphery of the coil bundle is constrained using a wall material for restraint, and the iron core is pressed and plastically deformed, and the coil bundle and the iron core Eliminate the gap between.
In this way, by deforming the iron core in accordance with the coil bundle, the iron core can be brought into close contact with the coil, and the space factor can be improved and the heat dissipation can be improved.

Patent Document 3 discloses a technique regarding a split stator structure.
After the conductive wire is wound around the split core and formed, the side surface of the coil is pressed using a molding die, and compression-molded into a tapered shape with high density.
By pressing, it is possible to increase the density of the coil and improve the space factor of the stator.

  Further, as shown in Patent Documents 1 to 3, improvement of the space factor of the stator is an important matter in order to reduce the size and increase the output of the motor. For this reason, in recent years, in order to increase the cross-sectional area of the conducting wire and reduce the gaps present in the coil, studies have been made on the use of a coil using a flat conductor as a stator.

JP 2005-192339 A JP 2006-042534 A JP 2006-204019 A

However, it is considered that the techniques disclosed in Patent Documents 1 to 3 have problems described below.
The stator of Patent Document 1 has a problem that the space factor of the stator is reduced as a result of inserting a pressing member formed of a magnetic material into the coil.
In the stator of Patent Document 2, it is not preferable to use a laminated steel plate in order to pressurize and plastically deform the iron core, which causes an eddy current problem. For this reason, there is a possibility of hindering high output.

In the stator of Patent Document 3, when the pressure is increased in order to increase the density when pressing the coil, the distance that the conductors move increases, and as a result, the possibility that the conductors rub against each other increases. If the conductive wires rub against each other, the insulation coating provided on the conductive wires may be damaged, which may cause a short circuit, which is not preferable. Therefore, it is difficult to increase the pressing force, and it is considered that pressing cannot be performed as the coil density is increased.
It is difficult to simply apply the methods of Patent Documents 1 to 3 to a stator using a flat conductor coil.

  Accordingly, an object of the present invention is to provide a claw-pole motor with high heat dissipation in order to solve such problems.

In order to achieve the above object, a claw pole type motor according to the present invention has the following characteristics.
(1) A first core having a plurality of claw portions on the circumference, a second core disposed to face the first core, and a ring-shaped coil sandwiched between the first core and the second core In a claw pole type motor having
A first insulator disposed between the first core and the ring-shaped coil; a second insulator disposed between the second core and the ring-shaped coil; and a wedge for pressing the ring-shaped coil. And the first core, the second core, the first insulator, the second insulator, the ring coil, and the wedge member are assembled, and the wedge member presses the ring coil. Then, the first insulator or the second insulator is pressed against the first core or the second core.

(2) In the claw pole type motor described in (1),
The wedge member is an annular member having a tapered surface disposed on the inner peripheral side of the ring-shaped coil, and the claw portion of the first core and the claw portion of the second core are the tapered surface. It is characterized by abutting on.

(3) In the claw-pole motor according to (1),
The ring-shaped coil is formed by winding a rectangular conductor in two strips so that the longitudinal direction thereof coincides with the axial direction, and the wedge member is inserted between the ring-shaped coils, whereby the first insulator or the first Two insulators are pressed against the first core or the second core.

With the claw pole type motor according to the present invention having such characteristics, the following operations and effects can be obtained.
The invention described in (1) above is sandwiched between a first core having a plurality of claw portions on the circumference, a second core disposed opposite to the first core, and the first core and the second core. In a claw pole type motor having a ring-shaped coil, a first insulator disposed between the first core and the ring-shaped coil, and a second insulator disposed between the second core and the ring-shaped coil; A wedge member that presses the ring-shaped coil, and the wedge member presses the ring-shaped coil by assembling the first core, the second core, the first insulator, the second insulator, the ring-shaped coil, and the wedge member. Then, the first insulator or the second insulator is pressed against the first core or the second core.

By pressing the ring-shaped coil against the first insulator, the first core, the second insulator, and the second core using the wedge member, the surface of the ring-shaped coil is brought into close contact with the first insulator and the second insulator.
In order to ensure heat dissipation, heat transfer between solids is preferable, and if an air layer exists between the solids, the air layer acts as a heat insulating material, resulting in the inhibition of heat transfer. Therefore, the ring-shaped coil is in close contact with the first insulator by the wedge member, and the first insulator is in close contact with the first core. The ring-shaped coil is in close contact with the second insulator, and the second insulator is in close contact with the second core. Thus, the adhesiveness of each member increases, so that the heat transfer property can be improved and the heat dissipation property of the stator can be improved.

The invention described in the above (2) is an annular member in which the wedge member has a tapered surface disposed on the inner peripheral side of the ring-shaped coil in the claw pole type motor described in (1). The claw portion of the first core and the claw portion of the second core are in contact with the tapered surface.
The wedge member is an annular member having a tapered surface, and the claw portions of the first core and the second core are brought into contact with the tapered surface, whereby the effect of pressing the ring-shaped coil to the outer peripheral side is obtained. As a result, the ring-shaped coil is pressed against the first insulator or the second insulator disposed on the outer peripheral surface side of the ring-shaped coil, and the first insulator or the second insulator is applied to the inner peripheral surface of the first core or the second core. Pressed.
As a result, the adhesiveness between the ring-shaped coil, the first insulator and the second insulator, the first core and the second core can be increased, heat transfer performance can be improved, and heat dissipation of the stator can be improved.

In the invention described in (3) above, in the claw pole type motor described in (1), the ring-shaped coil is wound in two strips so that the longitudinal direction of the rectangular conductor coincides with the axial direction. The member is inserted between the ring-shaped coils to press the first insulator or the second insulator against the first core or the second core.
As a result, what is present on the first insulator side with respect to the wedge-shaped member of the ring-shaped coil is present on the first insulator and the first core, and what is present on the second insulator side with respect to the wedge-shaped member is the second insulator and Pressed against the second core.
As a result, the adhesiveness between the ring-shaped coil, the first insulator and the second insulator, the first core and the second core is increased, the heat transfer property is improved, and the heat dissipation property of the stator can be improved.

It is a disassembled perspective view of the U-phase stack of 1st Embodiment. It is a perspective view of the state assembled to the middle of the U phase stack of a 1st embodiment. It is a perspective view of a U phase stack of a 1st embodiment. It is sectional drawing of the U-phase stack of 1st Embodiment. It is an exploded perspective view of a claw pole type motor of a 1st embodiment. It is a disassembled perspective view of the U-phase stack of 2nd Embodiment. It is a perspective view of the U phase stack of a 2nd embodiment. It is sectional drawing of the U-phase stack of 2nd Embodiment. It is sectional drawing of the U-phase stack of 3rd Embodiment.

First, a first embodiment of the present invention will be described.
(First embodiment)
FIG. 1 shows an exploded perspective view of the U-phase stack of the first embodiment. FIG. 2 is a perspective view showing a state in which the U-phase stack is assembled partway. FIG. 3 shows a perspective view of the U-phase stack. FIG. 4 shows a cross-sectional view of the U-phase stack. 4 is a cross-sectional view taken along the line AA in FIG.
The U-phase stack 10 includes a first core 12, a first insulator 13, a ring coil 14, a second insulator 15, a second core 16, and an inner ring 17.

The first core 12 is provided with 12 outer circumferential rings 12A and 12 claw portions 12B, which are claw-shaped projections, projecting toward the inner circumferential side of the outer circumferential ring 12A. The claw portion 12B is formed so as to protrude in the axial direction of the outer peripheral ring 12A. Specifically, the inner peripheral wall surface 12Bb provided so as to be orthogonal to the claw portion bottom surface 12Ba and the tapered surface 12Bc intersect with each other to form an intersection on the opposite side of the claw portion bottom surface 12Ba and to be provided on the outer ring 12A. The claw portions 12B are provided on the outer ring 12A alternately with the recesses 12C.
For the first core 12, a powder magnetic core made of a material obtained by finely pulverizing a magnetic material such as iron powder or permalloy and a resin is used. By using such a powder magnetic core, iron loss that occurs when the U-phase stack 10 is assembled to the stator 100 and used as a motor can be reduced.

A first cutout portion 12a and a second cutout portion 12b are provided on the surface of the outer peripheral ring 12A on the side where the claw portion 12B protrudes.
The second core 16 has substantially the same shape as the first core 12 and is disposed so as to face the first core 12.
The second core 16 is also provided with a claw portion 16B and a concave portion 16C on the inner peripheral side of the outer peripheral ring 16A, and is provided with a first cutout portion 16a and a second cutout portion 16b. The outer ring 16A corresponds to the outer ring 12A, the claw 16B corresponds to the claw 12B, the recess 16C corresponds to the recess 12C, and the first notch 16a and the second notch 16b correspond to the first notch 12a and the second notch 12b. To do.
The 1st insulator 13 is formed in cyclic | annular form with the resin which has insulation. The cross section is U-shaped, and as shown in FIG. 3, a groove portion 13 </ b> A serving as a groove in which the ring-shaped coil 14 is accommodated is formed.

The second insulator 15 is formed in substantially the same shape as the first insulator 13 and includes a groove portion 15A. In addition, the surface which the 1st insulator 13 and the 2nd insulator 15 oppose and contact is formed in the shape cut diagonally, and the 2nd insulator 15 and the 1st insulator 13 contact | abut the surface cut diagonally. Designed. By being configured in this way, it contributes to earning an insulation creepage distance between the first insulator 13 and the first core 12 or the second core 16.
The first insulator 13 and the second insulator 15 are made of a material having high insulating properties, high elastic force, and excellent heat resistance. Although the thickness is set to about 0.3 mm, the thickness is such that the first core 12, the second core 16, and the ring coil in a state where the first insulator 13 and the second insulator 15 are assembled to the stator 100. The thickness is set to such a degree that 14 insulation can be secured.

  The ring coil 14 is formed by winding a flat conductor having an insulating coating such as enamel on its surface. As shown in FIG. 1, the ring-shaped coil 14 is formed by winding a flat rectangular conductor by edgewise bending. Therefore, one end of the flat conductor is in a state of facing both end faces of the ring coil 14. The first coil end portion 14 </ b> A and the second coil end portion 14 </ b> B, which are the ends of the flat conductor, have a shape protruding toward the outer peripheral side of the ring-shaped coil 14. The conductor used for the ring coil 14 is preferably a highly conductive material such as copper or aluminum.

The inner ring 17 is a wedge member disposed on the inner peripheral side of the ring-shaped coil 14 and is formed using a member such as a resin that can ensure insulation. The inner ring 17 requires a function of pressing the first insulator 13, the ring-shaped coil 14, and the second insulator 15, and therefore requires a predetermined hardness.
The inner ring 17 includes an outer peripheral surface 17 a that contacts the first insulator 13 and the second insulator 15 on the outer peripheral side of the cylindrical shape. Further, on the inner peripheral side of the cylindrical shape, the first inner peripheral tapered surface 17b that contacts the tapered surface 12Bc formed on the first core 12 and the second inner peripheral surface that contacts the tapered surface 16Bc formed on the second core 16 are provided. A tapered surface 17c is provided.

A U-phase stack 10 as shown in FIG. 2 is formed by combining the first core 12, the first insulator 13, the ring coil 14, the second insulator 15, and the second core 16 in the order shown in FIG.
Since the V-phase stack 20 and the W-phase stack 30 have the same configuration as that of the U-phase stack 10, the description thereof is omitted here.

FIG. 5 shows an exploded perspective view of the claw pole type motor.
In this way, the U-phase stack 10, the V-phase stack 20, and the W-phase stack 30 are stacked as shown in FIG. 4 and sandwiched between the first bracket 61 and the second bracket 62, and the first fixing bolt 63A to the third fixing bolt 63C. The stator 100 is formed by fixing.
The 1st bracket 61 and the 2nd bracket 62 are annular plates, and are provided with the hole which penetrates the 1st fixing bolt 63A, the 2nd fixing bolt 63B, and the 3rd fixing bolt 63C in the outer peripheral part, and the hole to fasten. The first fixing bolt 63A is fastened to the first fastening hole 62A formed in the second bracket 62, the second fixing bolt 63B is fastened to the second fastening hole 62B, and the third fixing bolt 63C is fastened to the third fastening hole 62C. . Thus, the stator 100 is configured.
A rotor 50 and an output shaft 40 connected thereto are provided on the inner peripheral side of the stator 100 and function as a claw pole type motor 200.

Since the claw pole type motor 200 of the present embodiment is configured as described above, the following operations and effects are achieved.
First, the heat dissipation of the claw pole type motor 200 of the first embodiment can be improved.
The claw pole type motor 200 according to the first embodiment includes a first core 12 having a plurality of claw portions on a circumference, a second core 16 disposed to face the first core 12, a first core 12, In the claw pole type motor 200 having the ring-shaped coil 14 sandwiched between the second cores 16, the first insulator 13 disposed between the first core 12 and the ring-shaped coil 14, and the second core 16 and the ring-shaped motor A second insulator 15 disposed between the coil 14 and a wedge member that presses the ring-shaped coil 14, and includes a first core 12, a second core 16, a first insulator 13, a second insulator 15, and a ring; By assembling the coil 14 and the inner ring 17, the inner ring 17 presses the ring coil 14 and the first insulator 13 or the second insulator 15 is pressed. It is intended to press the first core 12 or the second core 16.

The inner ring 17 is an annular member having a first inner peripheral tapered surface 17b and a second inner peripheral tapered surface 17c disposed on the inner peripheral side of the ring-shaped coil 14, and the claws of the first core 12 are included. The portion 12B and the claw portion 16B of the second core 16 are in contact with the first inner peripheral tapered surface 17b and the second inner peripheral tapered surface 17c.
For this reason, when the 1st core 12, the 1st insulator 13, the ring-shaped coil 14, the 2nd insulator 15, the 2nd core 16, and the inner ring 17 are assembled | attached, the 1st insulator 13 and the 2nd insulator 15 which use the resin material. Will be crushed.
Since the inner ring 17 is disposed on the inner peripheral side of the ring-shaped coil 14, the tapered surface 12Bc of the claw portion 12B abuts on the first inner peripheral tapered surface 17b of the inner ring 17, and the tapered surface 16Bc of the claw portion 16B is As a result, the outer peripheral surface 17a presses the first core 12 and the second insulator 15 together with the ring-shaped coil 14 toward the outer peripheral side.
For this reason, the 1st core 12, the 1st insulator 13, and the ring-shaped coil 14 will contact | adhere, and the ring-shaped coil 14, the 2nd insulator 15, and the 2nd core 16 will also contact | adhere.

Therefore, heat generated from the ring-shaped coil 14 generated by energizing the claw pole type motor 200 is radiated to the outside through the first core 12 and the second core 16.
The ring-shaped coil 14 is wound so that the longitudinal direction coincides with the axial direction. That is, since the end portion of the flat conductor is in contact with the first insulator 13 and the second insulator 15, heat can be efficiently released.
Since high output of the claw pole type motor 200 is demanded, securing heat dissipation will be an important problem in the future. By quickly transferring heat to the first core 12 and the second core 16, heat is taken away by the first core 12 and the second core 16 having a larger heat capacity than the ring coil 14, and the ring coil 14 is cooled. The

Next, a second embodiment of the present invention will be described.
(Second Embodiment)
Although the second embodiment has substantially the same configuration as the second embodiment, since the shape of the wedge member and the form of the ring-shaped coil 14 are different, different points will be described below.
FIG. 6 shows an exploded perspective view of the U-phase stack of the second embodiment. FIG. 7 shows a perspective view of the U-phase stack. FIG. 8 shows a cross-sectional view of the U-phase stack. FIG. 8 is a BB cross section of FIG.
The ring-shaped coil 14 incorporated in the U-phase stack 10 is formed by winding a rectangular conductor having an insulating coating such as enamel on its surface. As shown in FIG. 1, the ring-shaped coil 14 is wound so that the longitudinal direction of the flat conductor coincides with the axial direction.

A coil wedge 18 is used as the wedge member. As shown in FIG. 8, the coil wedge 18 is inserted between the ring coils 14. The coil wedge 18 is an insulating material and is relatively hard.
After being assembled as shown in FIG. 7, the coil wedge 18 is inserted from between the claw portion 12 </ b> B of the first core 12 and the claw portion 16 </ b> B of the second core 16. A plurality of coil wedges 18 are prepared and inserted into a plurality of locations between the ring coils 14.

Since the U-phase stack 10 of the second embodiment has the above-described configuration, the following operations and effects are achieved.
First, the heat dissipation of the claw pole type motor 200 of the second embodiment can be improved.
The claw pole type motor 200 of the second embodiment includes a first core 12 having a plurality of claw portions on the circumference, a second core 16 disposed to face the first core 12, the first core 12, In the claw pole type motor 200 having the ring-shaped coil 14 sandwiched between the second cores 16, the first insulator 13 disposed between the first core 12 and the ring-shaped coil 14, and the second core 16 and the ring-shaped motor A second insulator 15 disposed between the coil 14 and a wedge member that presses the ring-shaped coil 14, and includes a first core 12, a second core 16, a first insulator 13, a second insulator 15, and a ring; By assembling the coil-shaped coil 14 and the coil wedge 18, the coil wedge 18 presses the ring-shaped coil 14, and the first insulator 13 or the second insulator 15 is moved to the first core. 12 or those pressed against the second core 16.

Then, the ring-shaped coil 14 is wound with two pieces of a rectangular conductor so that the longitudinal direction thereof coincides with the axial direction, and the coil wedge 18 is inserted between the ring-shaped coils 14, whereby the first insulator 13. Alternatively, the second insulator 15 is pressed against the first core 12 or the second core 16.
The coil wedge 18 is inserted between the two ring-shaped coils 14 provided to push the ring-shaped coil 14 toward the first insulator 13 or the second insulator 15.
The first insulator 13 is pressed against the first core 12, and the second insulator 15 is pressed against 16.

The ring-shaped coil 14 is pressed against and closely contacts the first insulator 13 and the first core 12, and the ring-shaped coil 14 is pressed against and closely contacts the second insulator 15 and the second core 16. When these are in close contact, heat generated from the ring-shaped coil 14 is transmitted to the first core 12 or the second core 16.
Heat transfer may be hindered by the presence of an air layer between the ring-shaped coil 14 and the first insulator 13 and the first core 12 or between the second insulator 15 and the second core 16. However, the use of the coil wedge 18 increases the adhesion, thereby reducing the air layer and improving the heat transfer performance. As a result, the heat dissipation of the stator 100 provided in the claw pole motor 200 is achieved. It is possible to improve the property.

Next, a third embodiment of the present invention will be described.
(Third embodiment)
The configuration of the third embodiment is substantially the same as that of the second embodiment. However, the shape of the wedge member is different.
FIG. 9 shows a cross-sectional view of the U-phase stack corresponding to FIG.
The wedge member used for the U-phase stack 10 is a flat disk plate 19. The disk plate 19 is an elastic member having an insulating property. A disc plate 19 is disposed between the ring-shaped coils 14 wound in two strips, and then incorporated into the U-phase stack 10.
The relationship between the first core 12 and the second core 16 and the ring-shaped coil 14 is that the ring-shaped coil 14 sandwiches the disc plate 19 and the first insulator 13 and the second insulator 15 are assembled together. The two cores 16 are formed, and the thickness is set to be slightly larger than the height of the recess for housing the ring-shaped coil 14.

For this reason, when the first core 12 to the second core 16 are assembled, the disk plate 19 is inevitably crushed, and the ring-shaped coil 14 is connected to the first core 12 and the first insulator 13 side by the elastic force. It is pressed against the insulator 15 and the second core 16 side.
By doing so, the adhesiveness of the first core 12 to the second core 16 is increased by the effect of the wedge member as in the second embodiment, and the heat dissipation of the stator 100 can be improved.

Next, a fourth embodiment of the present invention will be described.
(Fourth embodiment)
The fourth embodiment has almost the same configuration as the second embodiment. However, the materials of the first insulator 13 and the second insulator 15 and the procedure for assembling the stator 100 are slightly different. Different points will be described below.
The first insulator 13 and the second insulator 15 are made of thermoplastic elastomer as the material. In the fourth embodiment, a polyester-based thermoplastic elastomer is used.

Then, similarly to the stator 100 of the second embodiment, the U-phase stack 10, the V-phase stack 20, and the W-phase stack 30 are assembled, the stator 100 is heated using a method such as electromagnetic induction, and the first insulator 13 is heated. And in the state which made the 2nd insulator 15 soft, it fixes with the 1st fixing bolt 63A, the 2nd fixing bolt 63B, and the 3rd fixing bolt 63C.
At this time, a method may be employed in which the U-phase stack 10, the V-phase stack 20, and the W-phase stack 30 are heated in advance and assembled while the first insulator 13 and the second insulator 15 are soft.

Since the fourth embodiment is configured as described above, the following effects are achieved.
The polyester-based thermoplastic elastomer has a softening temperature as high as about 160 ° C. and does not melt again with the heat generated from the ring-shaped coil 14 while the claw pole motor 200 is driven. In addition, since the insulating property is relatively high, it is also possible to ensure insulation between the ring-shaped coil 14 and the first core 12 and the second core 16, which is the basic performance of the first insulator 13 and the second insulator 15.

By heating the first insulator 13 and the second insulator 15 and assembling them as the stator 100 in a soft state, the first insulator 13, the first core 12, the ring coil 14, the second insulator 15, the ring coil 14, and the first The degree of adhesion with the two cores 16 can be increased.
In the fourth embodiment, the ring-shaped coil 14 is pressed against the first core 12 and the second core 16 by the coil wedge 18 as in the second embodiment. However, it is possible to further increase the degree of adhesion by softening the first insulator 13 and the second insulator 15 when the stator 100 is assembled.

  In the fourth embodiment, the same configuration as that of the second embodiment is described for convenience of explanation. However, the same effect can be obtained by the configurations of the first embodiment and the third embodiment. That is, by using thermoplastic elastomer as the material of the first insulator 13 and the second insulator 15 and heating the stator 100 when assembled to soften the first insulator 13 and the second insulator 15, The second insulator 15 can be adapted to the ring-shaped coil 14, the first core 12, and the second core 16.

  Even when the inner ring 17, the coil wedge 18, and the disk plate 19 are not used, the ring-shaped coil 14 has a thickness that accommodates the ring-shaped coil 14 formed by the first core 12 and the second core 16. Even if it is made slightly thicker than the depth of the same, the same effect can be obtained. However, in this case, there is a problem that the manufacturing accuracy of the first core 12, the second core 16, and the ring-shaped coil 14 becomes severe. Therefore, it is considered that the use of the wedge member can secure the adhesion more easily. It is done.

Although the invention has been described according to the present embodiment, the invention is not limited to the embodiment, and by appropriately changing a part of the configuration without departing from the spirit of the invention. It can also be implemented.
For example, the exemplified materials can be changed, and the structure can be changed within the scope of the design change. For example, although the wedge member is described as a resin material, a rubber material or the like can be used instead. Further, although the dust core is used for the first core 12 and the second core 16 as well, it does not prevent the use of an alternative material.

10 U-phase stack 12 1st core 12A Outer peripheral ring 12B Claw part 12C Recess 13 First insulator 13A Groove part 13B Outer wall surface 14 Ring-shaped coil 14A First coil end part 14B Second coil end part 15 Insulator 15A Groove part 15B Outer wall surface 16 Second core 16A Outer ring 16B Claw portion 16C Recess 20 V-phase stack 30 W-phase stack 40 Output shaft 50 Rotor 61 First bracket 62 Second bracket 70 Grasping means 100 Stator 200 Claw pole type motor

Claims (3)

A claw having a first core having a plurality of claw portions on the circumference, a second core disposed opposite to the first core, and a ring coil sandwiched between the first core and the second core In the pole type motor,
A first insulator disposed between the first core and the ring coil;
A second insulator disposed between the second core and the ring coil;
A wedge member for pressing the ring-shaped coil,
By assembling the first core, the second core, the first insulator, the second insulator, the ring coil, and the wedge member,
The claw pole type motor, wherein the wedge member presses the ring-shaped coil to press the first insulator or the second insulator against the first core or the second core. The claw pole type motor according to claim 1,
The wedge member is an annular member having a tapered surface disposed on the inner peripheral side of the ring-shaped coil;
A claw pole type motor, wherein a claw portion of the first core and a claw portion of the second core abut on the tapered surface. The claw pole type motor according to claim 1,
The ring-shaped coil is wound in two strips so that the longitudinal direction coincides with the axial direction of the rectangular conductor, and the wedge member is inserted between the ring-shaped coils, so that the first insulator or the second A claw pole type motor, wherein an insulator is pressed against the first core or the second core.

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