JP2002136002A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent efficiency deterioration due to increase of eddy current that break an electrical insulation at a welded part when pole-tooth sections of a stator divided into segments at every pole tooth and wound in order and connected by welding so as to form a ring shape. SOLUTION: A ring-shaped stator is formed of serrated sections of the stator that are wound in order and connected into a ring shape, wherein the tip of a caulking member 3 is inserted and connected to a fixing groove 2A formed at the external periphery of the stator. Since there is no welded part in the stator, an electrical insulation is not broken, deterioration of efficiency caused by the increased eddy current is prevented, and then a concentrated-wound stator capable of achieving a small-sized motor with a simple configuration, high efficiency and high performance can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a concentrated winding and a stator of a generator.

[0002]

2. Description of the Related Art Conventionally, as a stator provided with a field winding of a motor and a generator, there is a concentrated winding stator in which one stator pole tooth is wound with one phase winding. The concentrated winding stator has the advantage that the winding end (coil end part) can be particularly shortened, so that the motor can be downsized and the winding resistance is also reduced, so that copper loss caused by winding current and winding resistance is reduced. And the advantage of high efficiency is obtained. Further, by arranging the windings in a slot portion where the windings of the stator can be accommodated, the space factor of the windings in the slots can be increased and the winding resistance can be reduced, so that a highly efficient motor can be realized. As one method of realizing this, windings are aligned and wound on a stator divided for each stator pole tooth, and then these stator pole teeth are connected in a ring to form a stator. In this connection, the outer peripheral portions of the stator pole tooth joints are integrated by welding or the like.

[0003]

Generally, as a material for a stator, a plate having a surface thickness of 0.1 mm, whose surface is electrically insulated to reduce eddy currents.
Approximately 5 to 0.2 electromagnetic steel sheets are laminated.

[0004] However, the windings are aligned and wound on the stator divided for each stator pole tooth, and then the stator pole teeth are welded in a ring shape, thereby destroying the electrical insulation of the laminated electromagnetic steel sheets at the welded portion. As a result, there is a problem that the eddy current increases and the efficiency deteriorates.

[0005]

According to the present invention, there is provided a stator connecting member comprising a plurality of stator poles, each of which has a single phase winding wound on the stator pole teeth. Without welding to the outer periphery of the member, it is caulked and fixed with a caulking member and integrated, so the electrical insulation of the laminated electromagnetic steel sheet is destroyed at the welded portion, so that eddy current increases and efficiency does not deteriorate Another object of the present invention is to provide an electric motor having a concentrated winding stator capable of realizing a small, highly efficient and high-performance motor with a simple structure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is characterized by an electric motor in which a plurality of stator division members having pole teeth are annularly combined to form an annular stator, and the adjacent stator division members are caulked and fixed by caulking members. The crimping member is fixed by caulking and integrated, so that the electrical insulation of the laminated electromagnetic steel sheet is destroyed at the welded portion, which increases the eddy current and does not deteriorate the efficiency. , A high-performance motor can be realized. Further, the present invention is suitable for a case where one stator division member has only one teeth portion.

Further, in the stator of the present invention in which the stator divided member is connected by the caulking member, the outer peripheral edge of the stator and the rear surface of the caulking member coincide, or the rear surface of the caulking member is recessed from the outer peripheral edge of the stator. Thus, the size of the stator frame that holds the outer periphery of the stator can be made the same shape as that obtained by connecting the stator division members, and the stator frame and the stator can be easily combined. If a part of the caulked portion protrudes from the outer peripheral edge of the stator of the connected stator by the caulking member, when the stator frame is mounted on the stator, the protruding portion of the caulked portion hinders the assembling. The present invention is suitable when the outer periphery of the stator has an arc shape. In addition, the stator outer peripheral edge when the outer periphery is an arc shape refers to an arc drawn at the maximum distance between the stator center and the outer peripheral surface of the split member when the stator split members are combined.

Further, the present invention is characterized in that the stator dividing member is provided with a caulking fixing groove on the side surface of the stator, and the tip of the caulking member is inserted into the caulking fixing groove. I do.

Further, the present invention is characterized in that the caulking member has a U-shape, and both ends face the inside of the caulking member.

Further, according to the present invention, a caulking fixing groove is provided on an outer peripheral portion of a width of a yoke portion which is a joining portion of a stator dividing member and which is parallel to an inner diameter portion of a slot. And a high-performance motor having no adverse effect on the magnetic saturation of the stator can be realized without obstructing the effective dimensions of the motor.

In the present invention, the caulking member has a U-shape, and both ends are inclined inside the caulking member.

Further, according to the present invention, since the swaging member has a spring property, it is possible to firmly fix the adjacent stator divided members, and when the stator is annularly connected, it is impossible to apply a force to the inner diameter side of the stator. Since a large load is not applied, the inner diameter of the split core stator whose inner diameter is more likely to be distorted than that of the integral core is improved.

Further, according to the present invention, the stator dividing member is provided with a caulking fixing hole in the rotation axis direction, and the caulking member is inserted into the caulking fixing hole, so that the fixing is performed by inserting the caulking member in the axial direction. Since an unreasonable load is not applied to the inner diameter side of the stator when the stators are annularly joined, the inner core has a feature that the inner diameter distortion of the split core stator whose inner diameter is easily distorted as compared with the integral core is not increased.

Further, in the present invention, the conductive winding may be concentratedly wound around the stator pole teeth to form the coil portion.

Further, according to the present invention, since the caulking member is made of a non-magnetic material, generation of an eddy current in the caulking member can be suppressed, and an increase in iron loss does not occur. It has features that can be realized.

Further, according to the present invention, the total of the axial dimensions of the caulking member is made shorter than the axial dimension of the stator.
The constituent materials can be reduced.

Further, according to the present invention, a plurality of caulking members are arranged at the joint portion of the adjacent stator division members, and are arranged so as to be staggered so that at least a part thereof overlaps in the axial section. Even when viewed in the axial section, the swaging member is always inserted into all the stator split members, so that the annular connection of the stator split members is strong.

Further, according to the present invention, a plurality of stator division members having a pole tooth portion are arranged around a positioning member, and a tip end surface of the pole tooth portion of the stator division member contacts an outer periphery of the positioning member. In this state, by caulking and fixing the adjacent stator division members with a caulking member, when inserting the caulking member into the caulking fixing groove of the stator, regardless of the axial direction or the radial direction, the inner diameter of the division core is adjusted. Accuracy can be improved.

Further, according to the present invention, a compact, high-efficiency, high-performance compressor can be realized by using a small, high-efficiency motor for the compressor.

[0020]

EXAMPLES (Example 1) Hereinafter, the present invention will be described based on preferred embodiments. FIG. 1 is a sectional view of a motor using the concentrated winding stator of the first embodiment. In the stator 1, a plurality of stator divided members 2 having pole teeth formed by concentrating windings 4 via insulators 5 are combined in a ring shape and fixed by a caulking member 3.

The rotor 6 is a so-called embedded magnet type motor in which a permanent magnet 7 is disposed inside a core. In this example, the motor is an embedded magnet type motor. However, the present invention can be applied to a surface magnet type motor in which permanent magnets are arranged on the rotor core surface, a switch reluctance motor using a concentrated winding stator, and the like. Not limited to slots.

The annular connection of the present stator will be described with reference to the stator sectional view of FIG. For explanation, the insulator 5 and the winding 4 are not shown. The stator dividing member 2 has two caulking fixing grooves 2A on the outer periphery of the stator. An annular stator is formed by inserting and connecting the tip of the caulking member 3 to the caulking fixing groove 2A.

According to the present invention, one phase winding is aligned and wound on the stator pole teeth divided for each pole tooth, and these stator division members are connected in a ring shape, and the adjacent stator division member outer peripheral portion is formed. Is crimped and fixed by a caulking member, so that electric insulation is broken at the welded portion without welding the outer periphery of each tooth joint to the annular connection of the stator pole teeth as in the conventional example. Thus, the eddy current increases and the efficiency does not deteriorate. An object of the present invention is to provide a concentrated winding stator capable of realizing a small, highly efficient, high-performance motor with a simple structure.

(Embodiment 2) FIG. 3 is a partially enlarged view of a stator connecting portion showing a second embodiment. The present invention is characterized in that the stator outer peripheral portion 12B is provided with a caulking fixing groove 12A at a width Y of a yoke portion, which is a joining portion of the stator division member, which is shown in oblique lines, and is smaller than a dimension parallel to the slot inner diameter portion. By arranging the caulking fixing groove 12A at such a position, the minimum required dimension Y of the stator yoke can be secured, and the effective dimension of the stator is not impaired by the caulking fixing groove 12A. A high-performance motor having no adverse effect on the magnetic saturation of the stator can be realized.

Further, similarly to the first embodiment, one phase winding is aligned and wound on the stator pole teeth divided for each pole tooth, and these stator division members are connected in a ring shape to form the adjacent stator teeth. Since the outer peripheral portion of the stator divided member is fixed by caulking with a caulking member and integrated, the outer peripheral portion of each stator magnetic pole tooth joint portion is not welded to the annular connection of the stator pole teeth as in the conventional example. The eddy current increases due to the breakdown of the electrical insulation at,
Efficiency does not suffer. An object of the present invention is to provide a concentrated winding stator capable of realizing a small, highly efficient, high-performance motor with a simple structure. The stator rear surface 14 is
The outer periphery of the stator, and the inside of the slot 15 is the bottom of the slot.

(Embodiment 3) FIG. 4 is a perspective view of a stator showing a third embodiment. For explanation, the insulator and the winding are not shown. The caulking member 23A is inserted into the caulking fixing groove 22A of the stator dividing member 22 from the axial direction and connected to form an annular stator. By inserting the caulking member 23A in the axial direction, an excessive load is not applied to the inner diameter side of the stator when the stator is annularly connected, so the inner diameter of the split core stator whose inner diameter is easily distorted compared to the integral core is reduced. It has the feature of being able to improve accuracy.

According to the present invention, one-phase windings are aligned and wound on stator pole teeth divided for each pole tooth, and these stator division members are connected in a ring shape to form an outer peripheral portion of the adjacent stator division members. The eddy current is increased by breaking the electrical insulation at the weld without welding the outer periphery of the tooth joint to each annular connection of the stator pole teeth because the It is another object of the present invention to provide a concentrated winding stator capable of realizing a small-sized, high-efficiency, high-performance motor with a simple structure without deteriorating efficiency.

In this embodiment, the axial dimension of the stator and the axial dimension of the caulking member are made substantially equal. However, even if the length is changed as long as the strength for connecting the stator divided members in a ring shape can be obtained, they are the same. The effect of is obtained.

(Embodiment 4) FIG. 5 is a perspective view of a stator showing a fourth embodiment. For explanation, the insulator and the winding are not shown. A plurality of caulking members 33B are inserted into the caulking fixing grooves 32A of the stator split member 32 and connected to form an annular stator.

By using a plurality of caulking members 33B having a shorter dimension than the axial dimension of the stator, the number of constituent materials can be reduced. FIG. 7 shows a core sheet 9 which is a stator constituent member. FIG. 7 shows a core sheet 9A having no crimp fixing groove 32A, a core sheet 9B having two crimp fixing grooves 32A, a core sheet 9C having only the right crimp fixing groove 32A, and a core sheet 9D having only the left crimp fixing groove 32A. FIG.
The portion indicated by B is formed by laminating the core sheets 9B, and is a portion for inserting the tip of the caulking member 33B and connecting the stator dividing member.

Similarly, the portion indicated by A is the core sheet A
And is a portion where the caulking member 33B is not inserted. In this way, by providing the crimp fixing grooves 32A only at the necessary minimum positions, the stator can be used more effectively than when all the core sheets are constituted by the core sheet 9B having the two crimp fixing grooves 32A, and the magnetic flux density is reduced. It is possible to obtain the effect of reducing the power consumption and improving the motor characteristics and efficiency. According to the present invention, a winding of one phase is aligned and wound on a stator pole tooth divided for each pole tooth, these stator division members are connected in a ring shape, and an outer peripheral portion of the adjacent stator division member is caulked. The crimping is fixed and integrated, so that the outer periphery of the tooth joint is not welded to each annular connection of the stator pole teeth, and the electrical insulation is destroyed at the welded portions, increasing the eddy current and increasing the efficiency It is intended to provide a concentrated winding stator capable of realizing a small-sized, high-efficiency, high-performance motor with a simple structure without deterioration of the motor.

(Embodiment 5) FIG. 6 is a perspective view of a stator showing a fifth embodiment. Similarly, for the sake of explanation, the insulator and the winding are not shown. The difference from the fourth embodiment is that
That is, the insertion positions of the plurality of caulking members 43B are arranged alternately. As shown in the figure, the adjacent stator is formed by appropriately laminating the core sheet BCD,
Can be realized. Even when viewed in an arbitrary axial section, the swaging member 43B is always inserted into all the stator split members, so that the annular connection of the stator split members is strong.

Further, by providing the crimp fixing grooves 32A only at necessary places, all the core sheets can be crimped.
Can effectively utilize the stator as compared with the structure constituted by the core sheet 9B having two portions, reduce the magnetic flux density, and improve the motor characteristics and efficiency. According to the present invention, a winding of one phase is aligned and wound on a stator pole tooth divided for each pole tooth, these stator division members are connected in a ring shape, and an outer peripheral portion of the adjacent stator division member is caulked. Since it is fixed by crimping and integrated, without welding the outer periphery of the stator magnetic pole tooth joint to each annular connection of the stator pole teeth,
Provide a concentrated winding stator that can realize a compact, high-efficiency, high-performance motor with a simple structure without increasing the eddy current due to the breakdown of the electrical insulation at the welded portion and reducing the efficiency. Is what you do.

(Embodiment 6) FIG. 8 is a partially enlarged view of a stator connecting portion showing a sixth embodiment. Stator split member 52
Has two caulking fixing grooves 52A on the outer periphery of the stator. The swaging member 60 is characterized by having spring properties. Hereinafter, the annular connection of the stator division members will be described. In order to insert the caulking member 60 into the caulking fixing groove of the stator, the caulking member tip 61 is bent and held so as to be parallel to the insertion direction as shown in 60A, and the outer periphery of the caulking member is fixed to the caulking fixing groove of the stator. Insert and fix in the radial direction from the side. Since the caulking member 60 has a spring property, the adjacent stator division members can be firmly fixed.

By applying the present invention to the fourth and fifth embodiments, an excessive load is not applied to the inner diameter side of the stator when the stator is annularly connected. It has the feature that the inside diameter can be made accurate. According to the present invention, a winding of one phase is aligned and wound on a stator pole tooth divided for each pole tooth, these stator division members are connected in a ring shape, and an outer peripheral portion of the adjacent stator division member is caulked. The crimping is fixed and integrated, so that the outer periphery of the tooth joint is not welded to each annular connection of the stator pole teeth, and the electrical insulation is destroyed at the welded portions, increasing the eddy current and increasing the efficiency It is intended to provide a concentrated winding stator capable of realizing a small-sized, high-efficiency, high-performance motor with a simple structure without deterioration of the motor. In this example, the axial dimension of the stator and the axial dimension of the caulking member are made substantially equal, but the same effect can be obtained even if the length is changed as long as the strength for connecting the stator divided members in a ring is obtained. can get.

By using a non-magnetic material for the caulking member, generation of eddy current in the caulking member can be suppressed, and an increase in iron loss does not occur, so that a highly efficient motor can be realized. .

[0037]

According to the present invention, there is provided an annular connection of a stator divided member in which one phase winding is aligned and wound on a stator pole tooth divided for each pole tooth, and an outer peripheral portion of the adjacent stator divided member. Simple structure without crimping with a caulking member and integrating without welding, so that the electrical insulation of the laminated electromagnetic steel sheets at the welds is destroyed, increasing eddy currents and reducing efficiency The present invention provides an electric motor having a concentrated winding stator capable of realizing a small, highly efficient and high-performance motor.

Further, by providing a caulking fixing groove on the outer peripheral portion rather than a dimension parallel to the inner diameter portion of the slot with the width of the yoke portion which is the joining portion of the stator dividing member, the effective size of the stator is obtained by the caulking fixing groove. , And a high-performance motor having no adverse effect on the magnetic saturation of the stator can be realized.

Further, since the caulking member has a spring property, the adjacent stator divided members can be firmly fixed, and when the stator is annularly connected, an excessive load is applied to the inner diameter side of the stator. Since it is not applied, the inner diameter of the split core stator whose inner diameter is more likely to be distorted than that of the integral core can be improved with high accuracy.

Further, the stator dividing member is provided with a caulking fixing hole in the rotation axis direction, and the stator is annularly inserted by inserting the caulking member in the axial direction with an electric motor having the caulking member inserted into the caulking fixing hole. Since an unreasonable load is not applied to the inner diameter side of the stator at the time of coupling, the inner diameter of the split core stator whose inner diameter is more likely to be distorted than that of the integral core can be improved.

The caulking member is made of a non-magnetic material, so that the generation of an eddy current in the caulking member can be suppressed, and an increase in iron loss does not occur, so that a highly efficient motor can be realized.

Further, the total length of the caulking member in the axial direction is shorter than the axial size of the stator, so that the number of constituent materials can be reduced.

Also, a plurality of caulking members are arranged at the joints of the adjacent stator division members, and are arranged so as to be staggered so that at least a part thereof overlaps in the axial cross section. Since the swaging member is always inserted into all the stator split members, the annular connection of the stator split members is strong.

Further, a plurality of stator splitting members having pole teeth are arranged around the positioning member, and the stator tooth splitting member comes into contact with the outer periphery of the positioning member when the tip end surface of the pole tooth contacts the outer periphery of the positioning member. By caulking and fixing the matching stator dividing member by a caulking member, when the caulking member is inserted into the caulking fixing groove of the stator, regardless of the axial direction or the radial direction, the inner diameter of the divided core can be improved accurately. It has features that can be.

Further, by using a small and highly efficient motor for the compressor, a small, highly efficient and high performance compressor can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of a motor using a concentrated winding stator according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a stator according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged view of a stator connecting portion showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a stator showing a third embodiment of the present invention.

FIG. 5 is a perspective view of a stator showing a fourth embodiment of the present invention.

FIG. 6 is a perspective view showing a stator according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of the stator component.

FIG. 8 is a partially enlarged view of a stator connection portion showing a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Stator division member 3, 60 Caulking member 4 Winding 5 Insulator 6 Rotor 7 Permanent magnet 8 Axis 9 Core sheet 61 Caulking member tip

Continuation of the front page F term (reference) 5H002 AA03 AA07 AB04 AB06 AC01 AC06 AE08 5H621 GA01 GA04 GA12 GA14 HH01 JK05 5H622 CA02 CA14 CB05

Claims (16)

[Claims] 1. An electric motor in which a plurality of stator division members having pole teeth are annularly combined to form an annular stator, and the adjacent stator division members are caulked and fixed by caulking members. 2. The electric motor according to claim 1, wherein one stator division member has only one teeth portion. 3. The stator in which the stator dividing members are connected by the caulking member, wherein the outer peripheral edge of the stator and the rear surface of the caulking member coincide, or the rear surface of the caulking member is recessed from the outer peripheral edge of the stator. An electric motor as described. 4. The electric motor according to claim 1, wherein the stator dividing member has a caulking fixing groove on a rear surface of the stator, and a tip of the caulking member is inserted into the caulking fixing groove. 5. The space between the inner diameter of the slot and the bottom of the caulking fixing groove is wider than the width Y of the yoke portion, which is the joining portion of the stator split members. Electric motor. 6. The electric motor according to claim 4, wherein the caulking member has a U-shape, and both ends are inclined inside the caulking member. 7. The electric motor according to claim 6, wherein the caulking member has a spring property. 8. The electric motor according to claim 1, wherein the stator dividing member has a caulking fixing hole in the rotation axis direction, and the caulking member is inserted into the caulking fixing hole. 9. The electric motor according to claim 1, wherein the conductive winding is concentratedly wound around the stator pole teeth to form a coil portion. 10. The electric motor according to claim 1, wherein the caulking member is made of a non-magnetic material. 11. The electric motor according to claim 1, wherein the sum of the axial dimensions of the caulking member is shorter than the axial dimension of the stator. 12. The electric motor according to claim 1, wherein a plurality of caulking members are arranged at a joint portion between adjacent stator division members, and are arranged so as to be staggered at least partially in an axial cross section. 13. The electric motor according to claim 4, wherein when the caulking member is inserted into the caulking fixing groove, the caulking member is inserted in the axial direction of the motor. 14. The electric motor according to claim 4, wherein when the caulking member is inserted into the caulking fixing groove, the caulking member is inserted in a radial direction of the motor. 15. A plurality of stator splitting members having pole teeth are arranged around a positioning member, and the stator tooth splitting member is positioned adjacent to the outer periphery of the positioning member with its tip end surface in contact with the outer periphery of the positioning member. A method for manufacturing a stator, in which the matching stator division members are caulked and fixed by caulking members. 16. A compressor using the electric motor according to claim 1.