JP7195180B2 - Stator and rotating electric machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator and a rotating electrical machine including the stator, and more particularly to a stator coil structure and a radial gap rotating electrical machine.

2. Description of the Related Art Rotating electric machines (motors) used as power sources for industrial machines and driving sources for automobiles are required to have high efficiency. In order to increase the efficiency of a motor, it is necessary to reduce the loss of the motor, and a design method is generally adopted to reduce the coil copper loss and the iron core iron loss, which are the two major factors of motor loss. Mechanical loss is uniquely determined when the output characteristics (rotational speed and torque) of the specifications required for the motor are determined, so it is important to design to reduce iron loss and copper loss.

Iron loss can be reduced by the soft magnetic material used. In general motors, magnetic steel sheets are used for the core, and the loss level varies depending on the thickness, Si content, and the like. As the soft magnetic material, high-performance materials such as iron-based amorphous metals, which have higher magnetic permeability and lower iron loss than magnetic steel sheets, and nanocrystalline materials, which can be expected to have high magnetic flux density, can be used. These high-performance materials have a thickness of 0.025 mm, which is very thin, and a Vickers hardness of 900, which is five times or more that of an electromagnetic steel sheet.

Copper loss is mainly determined by the relationship between the resistance value of the coil and the current, and can be reduced by reducing the current value by reducing the resistance value of the coil by cooling or suppressing the decrease in the residual magnetic flux density of the magnet. Furthermore, recent automobile drive motors and the like are designed to increase the ratio (space factor) of the conductor to the cross-sectional area of the slot of the stator core and reduce the resistance value to the theoretical limit. However, in the case of a coil composed of flat conductors that can increase the space factor in the slot, the conductor routing at the coil ends at both ends of the slot is complicated. , the volume (line length) of the coil end increases, and the resistance value increases slightly.

In Patent Document 1, two legs of a hairpin-shaped conductor segment are inserted into a stator core of a motor, and the conductor segment is bent at a coil end portion on the side opposite to the inserted side, and another coil is arranged in the circumferential direction. describes a method of manufacturing a stator by welding with bent portions of hairpin-shaped conductor segments to form toroidal coils. The method described in Patent Document 1 has the effect of increasing the slot space factor. and residual stress remains in the weld when bent. For this reason, there is a problem that it is difficult to ensure the reliability of welding joints, and there is room for improvement as a manufacturing method. In addition, since a space around the welded portion must be secured for welding, there is also a problem that the coil end portion on the welded side becomes large.

Patent Document 2 describes a stator that attempts to solve these problems. In the stator of Patent Document 2, a conductor segment that constitutes a coil has a plurality of parts divided by V-shaped end faces, and these parts are combined with each other in the axial direction at the end faces. These portions of the conductor segments are joined together with a conductive paste adhesive. In the stator disclosed in Patent Literature 2, since the coil end portions are not welded, the effect of reducing the resistance value of the coil can be expected by optimally designing the shape of the coil end portions. However, since it is necessary to apply an adhesive to each of the joints between the conductors to assemble the coil, there is a problem that the number of man-hours increases and it is difficult to ensure reliability. The V-shaped end faces can also be combined by simply fitting them without joining them with a conductive paste adhesive. However, it is difficult to ensure reliability only by fitting the V-shaped end faces. It is generally known that it is difficult to make contact with the V-shaped fitting part at the surface, and that some part of the V surface makes linear contact. Moreover, considering manufacturing variations, it is difficult to imagine that all of the linear contact portions are held in the same plane in the axial direction, and it is difficult to firmly connect (contact) all of the linear contact portions. It is believed that there is.

Patent Document 3 describes a stator in which two conductors divided in the axial direction are connected by a convex joint and a concave joint to form a coil. In the stator manufacturing method of Patent Document 3, in order to ensure connection reliability, after forming a coil by connecting conductors with the connecting portion exposed, split cores are joined in the circumferential direction to form a stator core. to form The stator of Patent Literature 3 also has the problem that the number of man-hours increases and it is difficult to ensure the reliability of the connection portion of the conductor.

Similarly to Patent Document 3, Patent Document 4 describes a stator in which a conductor having a convex joint and a conductor having a concave joint are connected to form a coil. In the stator manufacturing method of Patent Document 4, after the conductor is inserted into the slot, stress is applied to a part of the conductor to widen the width of the conductor in the slot, and a highly reliable connection is obtained by a crimping effect to improve conductivity. ensure If the width of the conductor is widened at all the connection portions of the conductor in order to ensure the reliability of the connection portion of the conductor, there is a problem that the number of man-hours increases.

In addition, as a method of manufacturing a stator, a method in which the connecting portion (tip portion) of two conductors that are connected to each other to form a coil is formed into a shape with a press-fitting tolerance, and these two conductors are mechanically and firmly joined. can be considered. In this method, a resin bobbin (cylindrical member) is used to securely secure an insertion area for the conductor, and stress is applied to the uneven connection portion to join, so a highly reliable connection can be expected.

JP 2011-239651 A JP 2015-23771 A JP 2013-208038 A JP 2016-187245 A

A coil made of a rectangular conductor can increase the space factor in the slots of the stator core. If a coil is composed of conductors in which two rectangular conductors are connected in the axial direction (the direction of the rotation axis of the rotor), when manufacturing the coil, stress must be applied to the thick and hard rectangular conductors to press them in the axial direction. , you need to connect the two conductors.

If the coil is composed of a conductor in a hairpin shape (a shape comprising two legs and a bent portion connecting them), applying an axial stress to the vertex of the bent portion will cause the two legs to It can be evenly axially stressed and inserted into the slot, and it can also axially connect two conductors.

However, in the conventional stator, it is difficult to insert the lead conductors (terminal connection portions) of the coils well into the slots along the axial direction. The lead conductor is shaped with one leg having a portion parallel to the axial direction, and this leg is inserted into the slot. Even if an axial stress is applied during manufacture of the coil, not only the stress in the axial direction but also the stress in the direction that tilts the lead conductor from the axial direction is applied to the lead conductor. Therefore, it is difficult to insert the lead conductor into the slot along the axial direction. It is difficult to let

Further, in the conventional stator, the lead conductor protrudes from the slot at the same angle as the other conductors forming the coil end portion, and then extends parallel to the axial direction. Therefore, the lead conductor must be inserted into the slot at the same time as other conductors forming the coil end portion. At this time, it is necessary to simultaneously insert the conductors forming the coil into all of the slots arranged in the circumferential direction of the stator core. However, when the conductors forming the coil are inserted into the slots, as described above, the lead conductors are also subjected to a stress in a direction inclined to the axial direction, and the lead conductors are no longer parallel to the axial direction. For this reason, there is a risk of damaging the insulator, damaging the insulating coating of the conductors that form the coil, or deforming the conductors that form the coil, which may reduce the reliability of the stator.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable stator that can be easily assembled without increasing the number of man-hours, and a rotating electrical machine equipped with this stator.

A stator according to the present invention includes an annular stator core provided with slots, and coils provided with segment conductors accommodated in the slots and lead conductors forming lead wires. The lead-out conductor includes a first straight portion accommodated in the slot and parallel to the axial direction, and a second straight portion positioned at the coil end portion, the first straight portion axially extending from the segment conductor. are mated and connected. The first straight portion and the second straight portion are different in radial position.

According to the present invention, it is possible to provide a stator that is highly reliable and can be easily assembled without increasing the number of man-hours, and a rotating electrical machine that includes this stator.

1 is a perspective view of a stator according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing segment conductors housed in slots of the stator core; 2B is an axial view of the stator core and segment conductors shown in FIG. 2A; FIG. FIG. 3 is a diagram showing coils (segment conductors) housed in slots of a stator core; FIG. 11 is a perspective view showing a conventional stator; FIG. 4 is a schematic diagram showing stress applied to a segment conductor when a hairpin-shaped segment conductor having two legs is inserted into a slot; FIG. 4 is a schematic diagram showing stress applied to a lead conductor when the lead conductor having only one leg is inserted into a slot; FIG. 4 is a perspective view of an inner peripheral lead conductor; 3 is a trihedral view of an inner peripheral lead conductor; FIG. FIG. 4 is a perspective view of a stator core in which an inner peripheral lead conductor and an outer peripheral lead conductor are accommodated in slots; FIG. 4 is a top view of a stator core in which an inner peripheral lead conductor and an outer peripheral lead conductor are accommodated in slots; FIG. 4 is a perspective view of the stator core showing inner and outer conductors held by terminal connection plates; FIG. 4 is a top view of the stator core showing inner and outer conductors held by terminal connection plates; FIG. 3 is a connection diagram showing coil connection (1Y connection). FIG. 4 is a perspective view of the stator core showing inner and outer conductors held by terminal connection plates; FIG. 4 is a perspective view of a stator core showing inner and outer conductors held by terminal connection plates (only conductor portions are shown); FIG. 4 is a top view of the terminal connection plate, showing the surface of the terminal connection plate; It is a bottom view of a terminal connection board, and is a figure which shows the back surface of a terminal connection board. FIG. 4 is a connection diagram showing coil connections (2Y parallel connection). It is a figure which shows the stator and rotor of the rotary electric machine by a present Example. It is a figure which shows the rotary electric machine by a present Example. FIG. 11 is a perspective view showing another form of the outer circumference side lead-out conductor; FIG. 9B is a perspective view of a stator provided with the outer-peripheral lead conductors shown in FIG. 9A; It is a perspective view which shows another form of a stator. 10B is a diagram showing a state in which the inner peripheral lead conductor and the outer peripheral lead conductor are held by the terminal connection plate in the stator shown in FIG. 10A; FIG. FIG. 4 is a diagram (top view viewed along the axial direction) showing an example of a stator having a structure in which a rotor can be inserted into the inner peripheral side of the stator from both sides in the axial direction of the stator; FIG. 4 is a view (cross-sectional view along the circumferential direction) showing an example of a stator having a structure in which a rotor can be inserted from both sides in the axial direction of the stator to the inner peripheral side of the stator;

A rotating electric machine according to the present invention comprises a rotor and a stator according to the present invention. The rotor is installed on the inner peripheral side of the annular stator and rotates around the rotation axis. The direction in which the rotating shaft extends is called the "axial direction", the rotating direction of the rotating shaft is called the "circumferential direction", and the radial direction of the rotating shaft is called the "radial direction".

A stator according to the present invention includes a segment conductor in which a coil is housed in a slot, and a lead conductor constituting a lead wire. The lead-out conductor includes a first linear portion accommodated in the slot and parallel to the axial direction, and a second linear portion positioned at the coil end portion. A coil is constructed by axially connecting two conductors by applying a force to fit the ends of two conductors together. With such a configuration, the first straight portion of the lead conductor is axially fitted and connected to the segment conductor within the slot.

The first straight portion and the second straight portion have different positions in the radial direction. Among the lead conductors, in the inner circumference side lead conductor located on the inner circumference side of the coil end portion, the second straight portion is located radially inside the first straight portion. In the outer circumference lead conductor positioned on the outer circumference side of the coil end portion, the second straight portion is positioned radially outside the first straight portion. The second straight portion may be axially parallel (i.e., parallel to the first straight portion) and extending axially outwardly and perpendicular to the axial direction (i.e., perpendicular to the first straight portion). may be stretched radially outward.

A stator and a rotating electrical machine according to embodiments of the present invention will be described below with reference to the drawings. The following examples are examples that specifically show the content of the present invention. The present invention is not limited to these examples, and various changes and modifications are possible within the scope of the technical ideas disclosed in this specification. In the drawings used in this specification, the same or corresponding components are denoted by the same reference numerals, and repeated description of these components may be omitted.

1 is a perspective view showing a stator according to an embodiment of the present invention; FIG. A stator 50 shown in FIG. 1 is used, for example, in a radial gap type rotary electric machine. The stator 50 has a stator core 1 with slots 7 and coils housed in the slots 7 . The stator core 1 has an annular shape around the axial direction and is provided with slots 7 on the inner periphery. At least teeth portions of the stator core 1 are made of a soft magnetic material such as amorphous or nanocrystalline alloy. The coils of the stator 50 shown in FIG. 1 have a wave winding structure.

The coil includes a segment conductor 3 and lead conductors 5 and 6 forming lead wires (terminal connecting portions). A portion of the segment conductor 3 protruding axially from the slot 7 constitutes a coil end portion. The segment conductors 3 at the coil end portions are also called coil end conductors. The lead conductors 5 and 6 include six inner circumference lead conductors 5 positioned on the inner circumference of the coil end and six outer circumference lead conductors 6 positioned on the outer circumference of the coil end. The inner peripheral lead conductor 5 is accommodated in the inner peripheral portion of the slot 7 and extends linearly in parallel with the axial direction. The outer conductor 6 is housed in the outer circumference of the slot 7 and extends linearly parallel to the axial direction. That is, the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6 are located at different radial positions and extend linearly in parallel to each other. The inner peripheral lead conductor 5 may be accommodated in the innermost peripheral portion of the slot 7 , and the outer peripheral lead conductor 6 may be accommodated in the outermost peripheral portion of the slot 7 .

Conductors 3, 5, and 6 forming a coil are housed in a slot 7 using an insulating bobbin 2, which is a tubular member made of resin.

2A, 2B, and 2C are diagrams illustrating the arrangement of coils (segment conductors 3) in the stator 50. FIG. In this embodiment, 48 slots 7 are arranged in the stator core 1 at a pitch of 7.5 degrees in the circumferential direction, and six segment conductors 3 are arranged in the radial direction in each slot 7. show.

2A is a diagram showing segment conductors 3 accommodated in slots 7 of stator core 1. FIG. The segment conductor 3 has a hairpin shape (a U-shape having two legs and a bent portion connecting them), the opening angle of the two legs is 45 degrees, and the insulating bobbin installed in the slot 7 It is housed in 2.

FIG. 2B is an axial view of the stator core 1 and segment conductors 3 shown in FIG. 2A. Segment conductors 3 are accommodated in slots 7 .

2C is a diagram showing coils (segment conductors 3) housed in slots 7 of stator core 1. FIG. The coil is composed of a hairpin-shaped segment conductor 3a having a bent portion in one axial direction and a hairpin-shaped segment conductor 3b having a bent portion in the other axial direction. The segment conductor 3a has a convex portion at the other end in the axial direction of the two legs. The segment conductor 3b has a concave portion at one end in the axial direction of two legs. The segment conductors 3 a and 3 b are axially connected to each other by fitting the projections and recesses of the ends of the legs in the slots 7 . The segment conductors 3a and 3b are axially coupled to each other in this manner to form a wave-wound coil.

FIG. 2B represents a circumferential quarter of the stator core 1 . The twelve slots 7 shown in FIG. 2B are numbered from (1) to (12). The radial positions of the six segment conductors 3 accommodated in the slots 7 are represented by A to F. Position A is the innermost peripheral portion (first layer) of the slot 7 , and position F is the outermost peripheral portion (sixth layer) of the slot 7 .

FIG. 2B shows three hairpin-shaped segment conductors 3 arranged in the radial direction. One leg of the radially innermost segment conductor 3 is placed at the position A of the (5) slot, and the other leg is housed at the position B of the (11) slot. One leg of the radially outermost segment conductor 3 is placed at the position E of the (5) slot, and the other leg is housed at the position F of the (11) slot. One leg of the segment conductor 3 between these segment conductors 3 is placed in the position C of the (5) slot and the other leg is housed in the position D of the (11) slot.

The segment conductors 3 axially connected to these three segment conductors 3 are arranged so that the segment conductors 3 form a wave-wound coil, as shown by the segment conductors 3a and 3b in FIG. 2C.

As can be seen from FIGS. 2A and 2B, in order to insert the hairpin-shaped segment conductors 3 into the slots 7, all the segment conductors 3 are combined in the same state as when they are housed in the slots 7, and then placed in this state. It is necessary to insert the segment conductors 3 as they are into the slots 7 (insert all the segment conductors 3 into the slots 7 at the same time). For example, after placing three segment conductors 3 in slot 7 as shown in FIG. Therefore, the segment conductor 3 cannot be inserted into the position A of the (6) slot. Therefore, in order to insert the segment conductors 3 constituting the coil of the wave winding structure into the slots 7, the segment conductors 3 combined in the same state as when stored in the slots 7 are moved in parallel in the axial direction. It must be inserted into slot 7.

In the stator 50 shown in FIG. 1, it can be seen that the hairpin-shaped segment conductors 3 are housed in the slots 7 so as to overlap each other in the radial direction to form a coil.

As shown in FIG. 1, the six inner peripheral lead conductors 5 bend radially inward at the portion immediately after exiting the slot 7 and do not contact the segment conductors 3 (coil end conductors) at the coil end portions. It has a shape. The six outer circumference lead conductors 6 are bent radially outward at a portion immediately after coming out of the slot 7 so as not to come into contact with the coil end conductors. The inner peripheral lead conductor 5 is accommodated in the radially innermost part of the slot 7 and positioned in the radially innermost part of the coil end portion. The six outer circumference lead conductors 6 are accommodated in the radially outermost part of the slot 7 and are located in the radially outermost part of the coil end portion. The lead conductors 5 and 6 are thus arranged to avoid interference with the coil end conductors.

Here, a conventional stator will be described.

FIG. 3A is a perspective view showing a conventional stator 51. FIG. In the conventional stator 51, the lead conductor 4 of the coil has a part that protrudes from the slot 7 at the same angle as the segment conductor 3 and constitutes the coil end part, and a lead wire (terminal connection part) that extends parallel to the axial direction. ). The segment conductor 3 has a hairpin shape with two legs. The lead conductor 4 has only one leg and lacks stability when inserted into the slot 7 .

FIG. 3B is a schematic diagram showing stress applied to the segment conductor 3 when the hairpin-shaped segment conductor 3 having two legs is inserted into the slot 7 . When a stress Fs is applied along the axial direction to the bent portion (top portion) of the segment conductor 3, the stress Fs is almost evenly distributed to the two legs. Therefore, the segment conductor 3 can be inserted into the slot 7 by applying a force parallel to the axial direction.

FIG. 3C is a schematic diagram showing the stress applied to the lead conductor 4 when the lead conductor 4 having only one leg is inserted into the slot 7 . When a stress Fs is applied to one end of the lead conductor 4 along the axial direction, the lead conductor 4 receives not only a force parallel to the axial direction but also a force in a direction that tilts the lead conductor 4 from the axial direction. Therefore, it is difficult to insert the lead conductor 4 into the slot 7 along the axial direction, and the lead wire may not be parallel to the axial direction. As a result, the lead conductor 4 may damage the insulator (insulating bobbin 2) provided in the slot 7, damage the insulating coating of the segment conductor 3, or deform the lead conductor 4 to insert it into the slot 7. It can happen that you can't.

A plurality of lead conductors 4 are provided in the circumferential direction of the stator core 1 and are inserted into the slots 7 in combination with the segment conductors 3 , which may cause frequent manufacturing defects of the stator 51 . In addition, when the coil is configured by fitting the ends of two segment conductors 3a and 3b together and connecting them in the axial direction as shown in FIG. 2C, a large force is required for fitting. However, the lead-out conductor 4 is not suitable for a configuration in which the connection is made by fitting with a large force. Even if the coil is composed of segment conductors 3 that are elongated in the axial direction and two segment conductors do not have to be connected to each other, if the lead conductor 4 is long and the insertion resistance into the slot 7 is large, the lead conductor 4 damage and deformation of the lead conductor 4 may occur.

The lead conductors 5 and 6 of the stator 50 according to this embodiment will be described.

FIG. 4A is a perspective view of the inner peripheral lead conductor 5. FIG. The inner peripheral lead conductor 5 includes a first straight portion 5a and a second straight portion 5b located axially outside the first straight portion 5a. The first straight portion 5a and the second straight portion 5b extend linearly in parallel to the axial direction, and their positions in the radial direction are different from each other. The first linear portion 5 a is accommodated in the slot 7 of the stator core 1 . The second straight portion 5b is positioned at the coil end portion and constitutes a lead wire (terminal connection portion). The shape of the connecting portion between the first straight portion 5a and the second straight portion 5b is arbitrary.

In the inner peripheral lead conductor 5, the second straight portion 5b is located radially inside the first straight portion 5a.

The first linear portion 5a has a convex portion at its tip in the axial direction. By fitting the convex portion into the concave portion at the tip of the leg portion of the segment conductor 3b in the slot 7, the inner peripheral side lead conductor 5 and the segment conductor 3 are connected to each other in the axial direction.

4B is a trihedral view of the inner peripheral lead conductor 5. FIG.

The front view is a view of the inner circumference side lead conductor 5 viewed along the radial direction, and shows that the inner circumference side lead conductor 5 extends linearly along the axial direction.

The left side view is a view of the inner peripheral lead conductor 5 viewed along the circumferential direction. and the second linear portion 5b are different from each other in the radial direction. When the thickness of the inner peripheral lead conductor 5 is represented by w, and the radial distance between the first straight portion 5a and the second straight portion 5b is represented by d, the distance d is greater than the thickness w. That is, the second linear portion 5b is separated from the first linear portion 5a by a distance d equal to or greater than the thickness w, and positioned radially inward of the first linear portion 5a.

The top view is a view of the inner peripheral lead conductor 5 viewed along the axial direction, and the radial positions of the first straight portion 5a and the second straight portion 5b are different from each other (the second straight portion 5b is located radially inward of the first straight portion 5a).

Like the inner circumference lead conductor 5, the outer circumference lead conductor 6 also has a first straight section and a second straight section located axially outside the first straight section. The first linear portion and the second linear portion extend linearly in parallel to the axial direction, and their positions in the radial direction are different from each other. However, in the outer circumference side lead-out conductor 6, the second straight portion is located radially outside the first straight portion. That is, in the outer peripheral lead conductor 6 , the second straight portion is separated from the first straight portion by a distance d equal to or greater than the thickness w, and positioned radially outside the first straight portion.

In the outer circumference side lead conductor 6 as well, the first linear portion has a convex portion at the tip portion in the axial direction. By fitting the convex portion into the concave portion at the tip of the leg portion of the segment conductor 3b in the slot 7, the outer peripheral side lead-out conductor 6 and the segment conductor 3 are connected to each other in the axial direction.

In the stator 50 according to the present embodiment, the segment conductors 3 are accommodated in the slots 7 after the inner peripheral lead conductors 5 and the outer peripheral lead conductors 6 are accommodated in the slots 7 when the stator 50 is assembled.

5A and 5B are views showing the stator core 1 in which the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 are accommodated in the slots 7. FIG.

5A is a perspective view of the stator core 1. FIG. In the inner peripheral lead conductor 5, the second straight portion 5b is located radially inside the first straight portion 5a (not shown in FIG. 5A). In the outer circumference lead conductor 6, the second straight portion 6b is located radially outside the first straight portion 6a (not shown in FIG. 5A).

FIG. 5B is a top view of the stator core 1 (a view of the stator core 1 viewed along the axial direction).

In the stator 50 according to this embodiment, the stator core 1 has 48 slots 7 . If the number of magnetic poles of the rotor of the rotary electric machine provided with the stator 50 is eight, the distributed winding coil straddle has an angle of 45 degrees, and the coils arranged at the positions A and B of the slots 7 are rotated. One series coil is configured by making two turns in the direction. By connecting this coil in series with the coils at positions C and D and the coils at positions E and F, a coil connected from position A (first layer) to position F (sixth layer) can be configured, Lead wires can be arranged on the innermost peripheral portion (first layer) and the outermost peripheral portion (sixth layer) of the coil.

Therefore, as shown in FIG. 5A, six inner peripheral lead conductors 5 are arranged at the position A of the slot 7 (first layer), and six outer peripheral lead conductors 6 are arranged at the position F of the slot 7 (sixth layer). ) are arranged.

As described above, in the inner peripheral lead conductor 5, the second straight portion is located radially inside the first straight portion, and in the outer peripheral lead conductor 6, the second straight portion is positioned radially inward of the first straight portion. It is located radially outside the straight portion. That is, the radial positions of the second straight portions of the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 are different from the radial positions of the segment conductors 3 accommodated in the slots 7 . For this reason, in the stator 50 according to this embodiment, the second straight portions 5b and 6b forming the lead wires of the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 correspond to the segment conductors 3 (coil end portions) of the coil end portions. conductor).

As shown in FIG. 5B, when the stator core 1 in which the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 are accommodated in the slots 7 is viewed along the axial direction, all of the slots 7 accommodating the segment conductors 3 can be seen. holes are visible. Therefore, when assembling the stator 50 , the segment conductors 3 can be accommodated in the slots 7 without contacting the inner peripheral lead conductors 5 and the outer peripheral lead conductors 6 accommodated in the slots 7 . That is, the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6 constituting the lead wire are arranged so as not to interfere with the segment conductor 3 which is accommodated in the slot 7 after these lead conductors 5 and 6 are accommodated in the slot 7. It can be arranged in the stator core 1 .

Furthermore, since the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6 are linear and extend along the axial direction, when the lead conductors 5 and 6 are inserted into the slot 7, a sufficiently large diameter parallel to the axial direction is required. A force can be applied to the lead conductors 5,6. Therefore, even if the lead conductors 5 and 6 are connected to the segment conductor 3 in the axial direction by fitting the first straight portions 5a and 6a to the segment conductor 3, a large force required for fitting is applied. The lead conductors 5 and 6 can be inserted into the slot 7 in parallel with the axial direction, and the first straight portions 5a and 6a can be fitted and connected to the segment conductor 3 in the axial direction.

Therefore, the lead conductors 5 and 6 do not damage the insulator (insulating bobbin 2) provided in the slot 7, damage the insulation coating of the segment conductor 3, or deform the segment conductor 3. The reliability of the stator 50 can be improved. In addition, since the stator 50 can attach the coil to the stator core 1 by applying a large force parallel to the axial direction to the segment conductors 3 and the lead conductors 5 and 6, it can be easily assembled and the number of man-hours can be reduced. Reliability can be improved without increasing it.

Since the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 are inserted into the slot 7 as described above, they are housed in the slot 7 with high positional accuracy. The lead wire (terminal connection part) of the coil is composed of the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6. Since the shape is simple and linear, the positional accuracy of the terminal part is high, and the terminal connection plate can hold.

6A and 6B are diagrams showing the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 held by the terminal connection plate 8. FIG. 6A is a perspective view of the stator core 1. FIG. FIG. 6B is a top view of the stator core 1 (a view of the stator core 1 viewed along the axial direction). The terminal connection plate 8 is provided axially outside the coil end portions of the stator 50 so as to cover the coil end portions.

The terminal connection plate 8 includes an annular insulating member and three types of conductor portions 9a, 9b, and 9c provided on the insulating member. The conductor portions 9a, 9b, and 9c are provided with holes through which the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 penetrate, and perform terminal connection of the coil. The terminal connection plate 8 holds the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 in the holes of the conductor portions 9a, 9b, and 9c, and connects the lead conductors 5 and 6 together. The conductor portion 9 c includes the input terminals 10 of the stator 50 .

The coils shown in FIGS. 6A and 6B are three-phase coils, and conductors forming the coils are connected by 1Y connection (star connection). Three conductor portions 9a and 9c are provided, and one conductor portion 9b is provided.

In FIGS. 6A and 6B, three-phase coils of U-phase, V-phase, and W-phase are arranged at regular intervals in the circumferential direction. That is, the three-phase coils are arranged at intervals of 120 mechanical degrees. Therefore, the inner circumference lead conductor 5 and the outer circumference lead conductor 6 of each phase are equally spaced apart from the other two phase inner circumference lead conductors 5 and outer circumference lead conductors 6 in the circumferential direction by 120 degrees. are placed. (The U-phase inner lead conductor 5 and the V-phase inner lead conductor 5 are arranged at equal intervals of 120 degrees in the circumferential direction, and the U-phase outer lead conductor 6 and the V-phase outer lead conductor The side lead conductors 6 are arranged at regular intervals of 120 degrees in the circumferential direction (the same applies to the V-phase and W-phase, and the W-phase and U-phase).
FIG. 6C is a connection diagram showing coil connection (1Y connection). (1) The inner circumference lead conductor 5 of the No. slot and the inner circumference lead conductor 5 of the (7) slot are connected, and the inner circumference lead conductor 5 of the (17) slot and the inner circumference lead conductor 5 of the (23) slot are connected. The inner circumference lead conductor 5 of the (33) slot and the inner circumference lead conductor 5 of the (39) slot are connected (pattern 1). Furthermore, the three neutral points, the outer conductor 6 of the (14) slot, the outer conductor 6 of the (30) slot, and the outer conductor 6 of the (46) slot are connected. (Pattern 2). The outer conductor 6 of the (8) slot, the outer conductor 6 of the (24) slot, and the outer conductor 6 of the (40) slot are each connected to the input terminal 10 (pattern 3 ).

FIG. 6B shows that these three types of wiring patterns for connecting the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 are arranged on the terminal connection plate 8 . On the terminal connection plate 8, three types of wiring patterns are arranged on one plane for connecting the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 by means of conductor portions 9a, 9b, and 9c. The conductor portion 9a comprises a member for connecting the pattern 1, that is, a member for connecting the inner circumference lead conductor 5 of the (1) slot and the inner circumference lead conductor 5 of the (7) slot, and (17) A member that connects the inner peripheral lead conductor 5 of the slot and the inner peripheral lead conductor 5 of the (23) slot, and the inner peripheral lead conductor 5 of the (33) slot and the inner peripheral side of the (39) slot. It is a member that connects with the lead conductor 5 . The conductor portion 9b is a member that connects the pattern 2, that is, the outer conductor 6 of the (14) slot, the outer conductor 6 of the (30) slot, and the outer conductor 6 of the (46) slot. It is a member that connects The conductor portion 9c is a member that connects the pattern 3, that is, a member that connects the outer conductor 6 of the (8) slot and the input terminal 10, and the outer conductor 6 of the (24) slot and the input terminal. 10 and a member for connecting the input terminal 10 of the outer conductor 6 of the (40) slot.

7A and 7B are diagrams showing the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 held by the terminal connection plate 8. The conductors constituting the coil are connected in 2Y parallel (double star connection or parallel star connection). FIG. 10 is a diagram showing coils connected by wire connection);

7A and 7B are perspective views of the stator core 1. FIG. The inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 are held by a terminal connection plate 8 . The terminal connection plate 8 includes an annular insulating member and two types of conductor portions 9d and 9e provided on the insulating member. The conductor portions 9d and 9e are arranged side by side in the axial direction. One conductor portion 9d is provided on the axially inner surface (back surface) of the insulating member, and three conductor portions 9e are provided on the axially outer surface (front surface) of the insulating member. Note that FIG. 7B shows only the conductor portions 9d and 9e of the terminal connection plate 8, and does not show the insulating member.

The conductor portion 9d has an annular shape and connects the six lead conductors 5 and 6, which are neutral points, to each other. The conductor portion 9e connects the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 to the input terminal 10 one by one.

FIG. 7C is a top view of the terminal connection plate 8 (a view of the terminal connection plate 8 viewed along the axial direction), showing the surface of the terminal connection plate 8. FIG. Three conductor portions 9 e are installed on the surface of the terminal connection plate 8 .

FIG. 7D is a bottom view of the terminal connection plate 8 (a view of the terminal connection plate 8 viewed along the axial direction), showing the back surface of the terminal connection plate 8. FIG. A conductor portion 9 d is provided on the back surface of the terminal connection plate 8 .

FIG. 7E is a connection diagram showing the wire connection (2Y parallel connection) of the coils shown in FIGS. 7A and 7B. (1) Inner circumference lead conductor 5 of No. slot, Outer circumference lead conductor 6 of (14) slot, Inner circumference lead conductor 5 of (17) slot, and Outer circumference lead conductor 6 of (30) slot The inner peripheral lead conductor 5 of the (33) slot and the outer peripheral lead conductor 6 of the (46) slot are connected. In addition, the inner peripheral lead conductor 5 of the (7) slot and the outer peripheral lead conductor 6 of the (8) slot are connected to the input terminal 10, and the inner peripheral lead conductor 5 and (24) of the (23) slot are connected to the input terminal 10. ) is connected to the input terminal 10, and the inner conductor 5 of the (39) slot and the outer conductor 6 of the (40) slot are connected to the input terminal 10. be.

FIG. 8A is a diagram showing the stator 50 and rotor 60 of the rotary electric machine according to this embodiment. The rotating electric machine according to this embodiment is of a radial gap type, and includes a stator 50 and a rotor 60 installed on the inner peripheral side of the stator 50 . The rotor 60 includes a shaft 11, a rotor core 13, and magnets 12 embedded in the rotor core 13, and rotates around the shaft 11 as a rotation axis. The rotor 60 is rotatably installed on the inner peripheral side of the stator 50 with a slight magnetic gap provided between the rotor 60 and the stator 50 .

FIG. 8B is a diagram showing the rotating electrical machine 70 according to the present embodiment, and is a cross-sectional view of the rotating electrical machine 70. As shown in FIG. A rotor 60 is installed on the inner peripheral side of the stator 50 with a small gap therebetween. The inner peripheral side lead conductor 5 of the stator 50 has the second straight portion 5b radially inside the first straight portion 5a so as not to contact the segment conductor 3 (coil end conductor) of the coil end portion. position (see FIG. 5B). Therefore, the position of the second straight portion 5b of the inner circumference lead conductor 5 is located inside the position of the outer circumference of the rotor 60 in the radial direction. That is, the inner diameter of the coil end portion of the stator 50 where the inner peripheral lead conductors 5 are provided is smaller than the outer diameter of the rotor 60 .

Therefore, when the rotor 60 is installed on the inner circumference side of the stator 50, the inner circumference of the stator 50 is moved from the coil end portion where the inner circumference lead conductor 5 of the stator 50 is provided (from the right side in FIG. 8B). The rotor 60 cannot be inserted into the inner peripheral side of the stator 50 (from the left side in FIG. 8B) from the coil end portion where the inner peripheral lead conductor 5 is not provided.

FIG. 9A is a perspective view showing another form of the outer circumference side lead conductor 6. FIG. In the outer circumference lead conductor 6 shown in FIG. 9A, the second straight portion 6b extends linearly outward in the radial direction. The second straight portion 6b may extend perpendicular to the axial direction (that is, perpendicular to the first straight portion 6a).

FIG. 9B is a perspective view of the stator 50 including the outer peripheral lead conductors 6 shown in FIG. 9A. In the inner peripheral lead conductor 5, the second straight portion 5b is positioned radially inside the first straight portion 5a (not shown in FIG. 9B) and extends linearly parallel to the axial direction. . In the outer peripheral lead conductor 6, the second straight portion 6b is located radially outside the first straight portion 6a (not shown in FIG. 9B) and extends linearly outward in the radial direction. do. In the stator 50 provided with the outer circumference side lead conductor 6 shown in FIG. 9A, the lead wire (terminal connection portion) of the coil formed by the inner circumference side lead conductor 5 extends along the axial direction, and the outer circumference side lead conductor The lead wire of the coil formed by 6 extends along the radial direction.

Even if the outer conductor 6 shown in FIG. 9A is used, a sufficiently large force can be applied to insert the conductors 5 and 6 into the slot 7 in parallel with the axial direction. The reliability of the stator 50 can be improved without damaging the insulator, damaging the insulating coating of the segment conductor 3, or deforming the segment conductor 3. 9A, the coil can be attached to the stator core 1 by applying a large force parallel to the axial direction to the segment conductors 3 and the lead conductors 5 and 6. Therefore, the assembly can be easily performed, and the reliability can be improved without increasing the number of man-hours.

FIG. 10A is a perspective view showing another form of the stator 50. FIG. In the stator 50 shown in FIG. 10A, the circumferential positions of the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 are different from the positions shown in FIGS. 5A, 6A, and 7A. In FIGS. 5A, 6A, and 7A, three-phase coils of U-phase, V-phase, and W-phase are arranged at regular intervals in the circumferential direction. That is, the three-phase coils are arranged at mechanical angle intervals of 120 degrees, and the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 of each phase correspond to the inner circumference side lead conductor 5 and the outer circumference side lead conductor 5 of the other two phases. They are arranged at regular intervals of 120 degrees in the circumferential direction with respect to the side lead conductors 6 .

The three-phase coils can also be arranged at intervals of 120 electrical degrees. That is, if the number of magnetic poles of the rotor 60 is M, the U-phase, V-phase, and W-phase coils can also be arranged at intervals of 240/M degrees in the circumferential direction. With such an arrangement, the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 of each phase are arranged 240/240/240 in the circumferential direction with respect to the inner circumference side lead conductor 5 and the outer circumference side lead conductor 6 of the other two phases. They are placed M degrees apart. (The U-phase inner circumference lead conductor 5 and the V-phase inner circumference lead conductor 5 are arranged 240/M degrees apart in the circumferential direction, and the U-phase outer circumference lead conductor 6 and the V-phase outer circumference lead conductor 6 are arranged 240/M degrees apart in the circumferential direction.The same is true for V phase and W phase, and W phase and U phase.)
The angle at the pair of poles is 360/(M/2) degrees. If the three-phase coils are arranged at intervals of 120 electrical degrees, the angle α (=360/(M/2)/3 degrees) obtained by dividing this angle 360/(M/2) degrees into three equal parts is the three-phase coil. It becomes the interval of the mechanical angle of the coil. Since the angle α is 240/M degrees, the three-phase coils are circumferentially spaced apart from each other by 240/M degrees.

For example, as shown in FIG. 10A, when the number of magnetic poles of the rotor 60 is eight (M=8), and three-phase coils are arranged at intervals of 120 electrical degrees, the three-phase coils are spaced 30 degrees apart in mechanical angle. Therefore, the inner circumference lead conductor 5 and the outer circumference lead conductor 6 of each phase are arranged 30 degrees apart in the circumferential direction from the inner circumference lead conductor 5 and the outer circumference lead conductor 6 of the other two phases. . (The U-phase inner circumference lead conductor 5 and the V-phase inner circumference lead conductor 5 are arranged 30 degrees apart in the circumferential direction, and the U-phase outer circumference lead conductor 6 and the V-phase outer circumference lead conductor 6 , are arranged 30 degrees apart in the circumferential direction. The same applies to the V phase and the W phase, and the W phase and the U phase.)
By arranging them in this manner, the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6 can be arranged in about half of the coil end portion in the circumferential direction. Even with such an arrangement, the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6 have high positional accuracy at the terminal portions, similar to the lead conductors 5 and 6 shown in FIGS. 5A, 6A, and 7A. It can be held by the terminal connection plate 8 .

10B is a diagram showing a state in which the inner peripheral lead conductor 5 and the outer peripheral lead conductor 6 are held by the terminal connection plate 8 in the stator 50 shown in FIG. 10A. Unlike the terminal connection plate 8 shown in FIG. 6A, the terminal connection plate 8 shown in FIG. 10B has a semi-annular shape and is installed only in about half of the stator 50 in the circumferential direction.

As shown in FIG. 10B , the terminal connection plate 8 may have a shape that protrudes radially inward from the coil end portions of the stator 50 . The semi-circular terminal connection plate 8 shown in FIG. 10B has a smaller area than the terminal connection plate 8 shown in FIG. It is possible. Therefore, in order to obtain an area necessary for installing a wiring pattern that connects the inner peripheral side lead conductor 5 and the outer peripheral side lead conductor 6, the terminal connection plate 8 is radially inside the stator 50 coil end portion. may protrude into By increasing the area of the terminal connection plate 8 in this way, the degree of freedom of wiring on the terminal connection plate 8 is increased.

However, if the terminal connection plate 8 has such a shape, when the rotor 60 is installed on the inner peripheral side of the stator 50, the coil end portion where the terminal connection plate 8 is not provided (the lower side in FIG. 10B ), it is necessary to insert the rotor 60 into the inner peripheral side of the stator 50 .

As described with reference to FIGS. 8B and 10B, in assembling the rotating electric machine 70, when the rotor 60 is installed on the inner peripheral side of the stator 50, only one axial direction of the stator 50 (that is, the inner peripheral It is necessary to insert the rotor 60 into the inner peripheral side of the stator 50 from only the coil end portion where the side lead-out conductors 5 are not provided.

In the following, when the rotor 60 is installed on the inner peripheral side of the stator 50 in the assembly of the rotating electric machine 70, the rotor 60 is inserted into the inner peripheral side of the stator 50 from both sides in the axial direction of the stator 50. An example of the stator 50 having a configuration that can be used will be described.

11A and 11B are diagrams showing an example of a stator 50 having a configuration in which rotors 60 can be inserted into the inner peripheral side of stator 50 from both sides in the axial direction of stator 50. FIG. FIG. 11A is a top view of the stator core 1, the segment conductors 3, and the inner peripheral lead conductors 5 viewed along the axial direction. FIG. 11B is a cross-sectional view of the stator core 1, the segment conductors 3, and the inner peripheral lead conductors 5 viewed along the circumferential direction. Rotor core 13 of rotor 60 is also shown in FIG. 11B.

In the stator 50 shown in FIGS. 11A and 11B, the second straight portions 5b of the inner circumference lead conductors 5 are located outside the outer circumference of the rotor 60 in the radial direction. That is, the inner diameter of the coil end portion of the stator 50 where the inner peripheral lead conductors 5 are provided is larger than the outer diameter of the rotor 60 .

The slot 7 has a gap 20 on the inner circumference where the segment conductor 3 and the inner circumference lead conductor 5 are not arranged. The first straight portion 5 a of the inner peripheral lead conductor 5 is located radially outside the gap 20 of the slot 7 . Therefore, the second straight portion 5 b of the inner circumference side lead conductor 5 is located radially outside the inner circumference of the stator 50 . Therefore, the second linear portion 5b is located radially outside the outer circumference of the rotor 60. As shown in FIG.

By arranging the inner circumference side lead conductors 5 at such a position, when the rotor 60 is installed on the inner circumference side of the stator 50, the coil end portion where the inner circumference side lead conductors 5 are provided. Even if the rotor 60 is inserted into the inner peripheral side of the stator 50 , the rotor 60 can be prevented from coming into contact with the inner peripheral lead conductors 5 . That is, in assembling the rotating electrical machine 70, when the rotor 60 is installed on the inner peripheral side of the stator 50, the stator 50 does not interfere with the rotor 60 from either side of the stator 50 in the axial direction. Moreover, the rotor 60 can be inserted into the inner peripheral side of the stator 50 .

It is known that coils of the stator 50 of the rotary electric machine 70 experience higher-frequency eddy current loss in coils closer to the rotor 60 . Therefore, in the rotating electric machine 70 that rotates at high speed, it is desirable to provide the gap 20 in the inner peripheral portion (on the rotor side) of the slot 7 of the stator 50 . The stator 50 shown in FIGS. 11A and 11B not only gives flexibility in assembling the rotating electric machine 70 but also reduces eddy current loss generated in the coils.

In the stator 50 according to the present embodiment, it is necessary to apply an axial stress to the conductors (segment conductors 3, inner circumference side lead conductor 5, outer circumference side lead conductor 6) constituting the coils when assembled. Even if an axial stress is applied to the conductors that form the coils, the conductors that form the coils are extremely unlikely to damage the insulating member and the stator core 1 compared to the conventional stator 51 . The stator core 1 is sensitive to stress, and some core losses increase when stress is applied. The stator 50 according to this embodiment can prevent an increase in iron loss even if the stator core 1 is made of a low-loss material such as a high-grade magnetic steel sheet or an amorphous material. In addition, in the stator 50 according to the present embodiment, when the rotor 60 is inserted into the inner peripheral side of the stator 50, damage to the coil, insulator, and stator core 1, deformation of the coil, etc. can be prevented. The types of coils can be reduced, and the necessary assembly jigs and equipment investment can also be reduced. Furthermore, since the assembly process of the rotating electrical machine 70 can be simplified, the manufacturing cost of the rotating electrical machine 70 can be expected to be reduced.

It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the above embodiments have been described in detail in order to facilitate understanding of the present invention, and the present invention is not necessarily limited to aspects having all the described configurations. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to delete a part of the configuration of each embodiment, or to add or replace another configuration.

DESCRIPTION OF SYMBOLS 1... Stator core 2... Insulating bobbin 3, 3a, 3b... Segment conductor 4... Lead conductor 5... Inner circumference side lead conductor 5a... First straight part 5b... Second straight part 6 Outer circumference lead conductor 6a First straight portion 6b Second straight portion 7 Slot 8 Terminal connection plate 9a, 9b, 9c, 9d, 9e Conductor 10 Input terminal DESCRIPTION OF SYMBOLS 11... Shaft, 12... Magnet, 13... Rotor core, 20... Gap, 50... Stator, 51... Conventional stator, 60... Rotor, 70... Rotary electric machine.

Claims (10)

a toric stator core with slots;
a coil comprising a segment conductor housed in the slot and a lead conductor constituting a lead wire;
with
The lead-out conductor includes a first straight portion accommodated in the slot and parallel to the axial direction, and a second straight portion positioned at the coil end portion, the first straight portion axially extending from the segment conductor. is mated and connected to
the first straight portion and the second straight portion are different in radial position,
The lead conductor includes an inner circumference lead conductor accommodated in the inner circumference of the slot and an outer circumference lead conductor accommodated in the outer circumference of the slot,
wherein the second straight portion of the inner peripheral lead conductor is located radially inside the first straight portion ;
The outer circumference side lead conductor has the second linear portion located radially outside the first linear portion ,
A stator characterized by: The stator of claim 1;
a rotor installed on the inner peripheral side of the stator;
A rotating electric machine, comprising: The second straight portion is parallel to the axial direction,
The rotary electric machine according to claim 2. The second straight portion of the inner peripheral side lead conductor and the outer peripheral side lead conductor does not contact the segment conductor,
The rotary electric machine according to claim 2 . a stator;
a rotor installed on the inner peripheral side of the stator;
with
The stator is
a toric stator core with slots;
a coil comprising a segment conductor housed in the slot and a lead conductor constituting a lead wire;
with
The lead-out conductor includes a first straight portion accommodated in the slot and parallel to the axial direction, and a second straight portion positioned at the coil end portion, the first straight portion axially extending from the segment conductor. is mated and connected to
the first straight portion and the second straight portion are different in radial position,
The lead conductor includes an inner circumference lead conductor accommodated in the inner circumference of the slot and an outer circumference lead conductor accommodated in the outer circumference of the slot,
the second straight portion of the inner peripheral lead conductor is parallel to the axial direction,
In the outer circumference side lead conductor, the second straight portion is perpendicular to the axial direction,
A rotating electrical machine characterized by: the stator includes terminal connection plates axially outside the coil end portions,
The terminal connection plate includes a conductor portion that holds and connects the lead conductor,
The rotary electric machine according to claim 2. The stator includes the three-phase coils,
The lead conductors of each phase are arranged at regular intervals in the circumferential direction with respect to the lead conductors of the other two phases.
The rotary electric machine according to claim 6 . The stator includes the three-phase coils,
The number of magnetic poles of the rotor is M,
The lead conductors of each phase are arranged 240/M degrees apart in the circumferential direction from the lead conductors of the other two phases,
The rotary electric machine according to claim 6 . a stator;
a rotor installed on the inner peripheral side of the stator;
with
The stator is
a toric stator core with slots;
a coil comprising a segment conductor housed in the slot and a lead conductor constituting a lead wire;
with
The lead-out conductor includes a first straight portion accommodated in the slot and parallel to the axial direction, and a second straight portion positioned at the coil end portion, the first straight portion axially extending from the segment conductor. is mated and connected to
the first straight portion and the second straight portion are different in radial position,
The lead conductor includes an inner circumference lead conductor accommodated in the inner circumference of the slot and an outer circumference lead conductor accommodated in the outer circumference of the slot,
The position of the second straight portion of the inner circumference side lead conductor is radially inside the position of the outer circumference of the rotor.
A rotating electrical machine characterized by: In the inner peripheral side lead conductor, the position of the second straight portion is outside the position of the outer circumference of the rotor in the radial direction.
The rotary electric machine according to claim 2 or 5 .

Images