JP2012222970A - Coil terminal processing structure of stator in electric motor, and coil terminal processing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil terminal processing structure of a stator in an electric motor, and a coil terminal processing method of the same.SOLUTION: A coil terminal processing structure has: a stator 1 that is housed in a case 2 of an electric motor, and in which a coil 10 is distributed and wound around a slot of a stator core and lacing processing by binding threads is performed to a coil end of this coil 10; and a coil end cover 3 that is overlapped with the stator 1 to cover the coil end, and on whose plate surface a lead wire groove 32 for press-fitting a lead wire 7 is provided. The lead wire 7 introduced in the case 2 of the electric motor is press-fitted to the lead wire groove 32 of the coil end cover 3, and thereby, the lead wire 7 is arranged to a predetermined position and connected with a coil end 10a of the stator 1.

Description

  The present invention relates to a stator winding end processing structure in an electric motor and a winding end processing method thereof.

In a winding-type electric motor generally called distributed winding, after performing inserter winding, an operation of lacing that fixes and fixes a coil end with a thread is required (see, for example, Patent Document 1).
In the invention of Patent Document 1, the terminal block is raced and fixed together with the coil end.
Even when the terminal block as in Patent Document 1 is not used, a lead wire, a thermal protector, and the like are often raced together with the coil end. By doing so, it is possible to save the trouble of individually fixing the lead wire and the thermal protector.

Japanese Patent Laid-Open No. 10-014152

  However, in order to race the lead wire and the thermal protector together with the coil end, naturally, the coil end of the lead wire must be connected and the thermal protector must be installed before the racing operation. In the manufacturing process after racing, the stator with the lead wire and the thermal protector must be subjected to operations such as secondary molding of the coil end, impregnation, and insertion into the case.

If the secondary end of the coil end is formed on a stator with a lead wire or thermal protector, the shape of the part to be molded is complicated and local forces are easily applied. May cause problems.
In addition, the secondary forming jig must be provided with relief portions for lead wires and thermal protector wires, which complicates the shape of the jig.

  Similarly, a jig for depositing lead wires is also required in the impregnation step. Impregnation is a process of impregnating a coil with a resin such as varnish.

  Among these problems, the worst workability is most noticeable when the lead wire is inserted into the lead wire insertion hole after the stator is shrink-fitted into the case. Shrink fitting is a manufacturing method in which when the stator is inserted into the case, only the case is heated and expanded in advance, and then the stator is inserted into the case. When the case temperature decreases after shrink fitting, the case and the stator are firmly fixed.

  After shrink fitting, it is necessary to insert the lead wire into the lead wire insertion hole provided in the case. However, in the conventional method, one end of the lead wire is already connected to the winding end of the stator. In order to pass the lead wire through the lead wire insertion hole, the lead wire must be passed from the inside to the outside of the case. Since the distance between the coil end and the lead wire insertion hole is extremely short, the lead wire has to be bent and inserted through the hole, and the workability is extremely poor.

In addition to the above problems, there is also a problem of lead wire pullout strength.
The lead wire of an electric motor may be pulled with an unexpectedly strong force during installation.
Therefore, it is necessary to withstand a tensile force of about 10 kgf as the tensile strength of the lead wire so that no pull-out occurs even if it is pulled with a certain amount of force.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a winding terminal processing structure of a stator in an electric motor and a winding terminal processing method thereof.

In order to solve the above-described conventional problems, the present invention is housed in a case of an electric motor, and windings are distributedly distributed in slots of a stator core, and the coil ends of the windings are laced by binding yarns. A lead that is introduced into the case of the electric motor, and includes a treated stator, a coil end cover that covers the coil end so as to overlap the stator and is provided with a lead wire groove for press-fitting a lead wire on the plate surface. The wire is press-fitted into the lead wire groove of the coil end cover to be disposed up to a predetermined position and connected to the winding end of the stator.
Further, the lead wire groove of the coil end cover is set to have a width smaller than the outer diameter of the lead wire.
Furthermore, the groove for the lead wire of the coil end cover is to change the direction in the circumferential direction after going from the vicinity of the lead wire insertion hole of the motor case to the center in the radial direction.
Furthermore, the angle formed between the lead wire grooves of the coil end cover when the direction is changed from the radial direction to the circumferential direction is an acute angle.
Another object of the present invention is to provide an upper cover that covers and covers the outside of the coil end cover and is pressed and fixed by a flange from the outside.
Furthermore, the coil end cover is provided with protrusions on both sides of the radial lead wire groove so that the lead wire is fixed by being deformed by a side surface of the flange and a bush relief portion.
Still further, the lead wire groove of the coil end cover is provided with a protrusion on the inner diameter side of the portion whose direction changes from the radial direction to the circumferential direction.
Further, the coil end cover is provided with a notch and a storage part for inserting a thermal protector into contact with the coil end and fixing it.
Further, the lead wire insertion hole of the electric motor case is provided with a bush having a smaller inner diameter from the outer side to the inner side of the electric motor case.
Furthermore, a stator in which the coil ends of the windings distributed in the slots of the stator core are laced is mounted in the motor case, the coil end cover is put on the coil ends, and the lead wires are inserted into the lead wire insertion holes of the motor case. The lead wire is press-fitted into a lead wire groove provided on the plate surface of the coil end cover, and its tip is connected to the winding end at a predetermined position.
Further, lead wires are inserted through the lead wire insertion holes of the motor case from the outside to the inside of the motor case, and then in the lead wire grooves formed in the radial direction on the plate surface of the coil end cover. Along the lead wire groove formed by bending the lead wire inward from the lead wire insertion hole and bending the tip of the lead wire at an acute angle from the middle of the lead wire groove formed in the radial direction Then, the lead wire is press-fitted into a lead wire groove formed in the circumferential direction on the plate surface of the coil end cover, and the tip of the lead wire is connected to the winding end. It is in connection processing.

According to the present invention, the following effects can be obtained.
According to the invention of claim 1, since it is not necessary to perform operations such as secondary molding of the coil end, impregnation, and insertion into the case for the stator with the lead wire as in the prior art, There is no need to make the jig shape complicated. In addition, since the lead wire is inserted into the motor case after the stator is housed in the motor case, the operation of passing the lead wire through the lead wire insertion hole of the motor case is facilitated. Since the lead wire can be held by press-fitting the lead wire into the groove of the coil end cover, the lead wire can be securely fixed.
According to the second aspect of the present invention, since the lead wire can be fixed by a line or a surface instead of a point, the fixing force is increased. Therefore, the lead wire pullout strength is increased.
According to the invention of claim 3, the pull-out strength can be increased by bending the lead wire.
According to the invention of claim 4, the lead-out strength can be further increased by sharpening the bending angle of the lead wire.
According to the invention of claim 5, since the upper cover is pressed by the motor flange and the upper cover presses the coil end cover, the lead wires arranged in the coil end cover can be more firmly fixed.
According to the sixth aspect of the present invention, the lead wire is pressed by the deformation of the coil end cover in the vicinity of the bush, so that the lead wire pull-out strength can be further increased.
According to the seventh aspect of the present invention, the lead wire groove of the coil end cover fixes the lead wire by the protrusion provided on the inner diameter side of the portion that changes the direction from the radial direction to the circumferential direction. Can be further enhanced.
According to invention of Claim 8, a thermal protector can be fixed very easily.
According to the ninth aspect of the present invention, the lead wire can be easily passed through the lead wire of the motor case from the outside toward the inside.
According to the invention of claim 10, the work of inserting the lead wire into the motor case and the work of connecting the lead wire and the winding end can be easily performed.
According to the eleventh aspect of the present invention, it is possible to more easily perform the operation of inserting the lead wire into the motor case, and it is possible to reliably hold the lead wire.

1 is a side view showing a stator winding terminal processing structure in an electric motor according to an embodiment of the present invention with a part of the case of the electric motor cut away. It is a top view which shows the lead wire which removed the flange and upper cover of FIG. 1, and was introduce | transduced into the case. It is a perspective view which decomposes | disassembles and shows the component in the case of the electric motor of FIG. FIG. 4 is a perspective view showing a state where the stator and the coil end cover of FIG. 3 are housed in an electric motor case. FIG. 4 is a perspective view showing the stator in a state where a second upper cover is assembled to the first coil end cover of FIG. 3. FIG. 2 is a conceptual cross-sectional view showing a part of the motor case, a stator, a first coil end cover, and a second upper cover in FIG. It is a conceptual diagram which shows an example of the structure of the lead wire groove | channel arrange | positioned in the coil end cover of FIG. 2, and the lead wire routing structure. It is a conceptual diagram which shows the modification of the coil end cover of FIG. It is a conceptual perspective view which shows the modification of the coil end cover and upper cover of FIG. It is a conceptual diagram which shows another modification of the coil end cover of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 7 are views showing a stator winding terminal processing structure in an electric motor according to an embodiment of the present invention. 1 to 7, reference numeral 1 denotes a stator drawn out from the case 2 of the electric motor. The stator 1 is housed in the motor case 2 by assembling the first coil end cover 3 and the second upper cover 4 and covering the flange 5. In the stator 1, a first coil end cover 3 and a second upper cover 4 are assembled to a stator core 11 around which a coil winding 10 is wound. On the axis of the stator 1, a rotor 6 supported by bearings 21 and 22 in a motor case 2 is disposed. As the support structure of the rotor 6, for example, the rotating shaft 6 a is rotatably supported by bearings 21 and 22 assembled to the main body portion 20 of the case 2, and the bearing 21 is supported by the flange 5, and the main body portion. The bearing 22 is supported by 20 boss portions 20a.

The first coil end cover 3 is provided with a cylindrical portion 30a on the outer periphery of a ring-shaped main body 30 by resin molding, and axial ribs 31 are arranged at regular intervals in the circumferential direction on the outer peripheral surface of the cylindrical portion 30a. In several places. The first coil end cover 3 is held in pressure contact with the inner wall surface of the case 2 of the motor by the ribs 31. A plurality of lead wire grooves 32 in which, for example, 2 to 5 lead wires 7 introduced from the outside are disposed are formed on the plate surface 30b of the upper portion of the main body 30 in the figure. In the illustrated example, two arc-shaped lead wire grooves 32 for wiring the two lead wires 7 are formed along the periphery. The lead wire groove 32 is formed to be slightly thinner than the thickness of the lead wire 7, and is formed so that the lead wire 7 can be prevented from being pulled out by being pushed in.
FIG. 7 shows a specific example of the lead wire groove 32 in which the drawing is divided into left and right parts. The example on the left side of the figure shows a vertical groove 32a formed in the radial direction of the plate surface 30b and the vertical groove 32a. The inclined groove 32b is formed by bending at an acute angle, and the arc groove 32c is formed in a semicircular shape along the circumferential direction from the inclined groove 32b. The longitudinal groove 32a formed in the radial direction of the plate surface 30b is led out to the outside of the coil end cover 3, and the lead wire 7 is inserted into the case 2 from the insertion hole 2a formed in the case 2 of the electric motor. Wiring is provided along the grooves 32 a to 32 b and 32 c and the lead wire groove 32, and is connected to the lead wire 10 a from the coil winding 10. The example on the right side of FIG. 7 shows a case where the inclined groove 32b is omitted and the groove 32a is directly connected to the arc groove 32c. 2 to 4 show an example in the case of connecting to the arc groove 32c directly from the groove 32a.
In this embodiment, the lead wire 10a is drawn out to the grooves 32d and 32e of the plate surface 30b by the concave portions 30c and 30d formed along the axial direction on the inner and outer peripheral surfaces of the cylindrical portion 30a. It is connected.

Thus, the upper ends of the recessed portions 30c and 30d are connected to the arc groove 32c via the introduction grooves 32d and 32e formed radially on the inner diameter side and the outer diameter side of the plate surface 30b. Note that the lead wire 10a can be pulled out directly into the arc groove 32c by making a hole directly in the plate surface 30b instead of the concave portions 30c and 30d. The connecting portion between the lead wire 10a and the core wire 7a of the lead wire 7 may be covered with an insulating tube.
FIG. 7 shows a case of connecting to an arc groove 32c formed in a semicircular shape through an inclined groove 32b formed by bending at an acute angle shown on the left side, and a groove formed in the radial direction shown on the right side. The case where it connects directly to the circular arc groove 32c from 32a is shown. Actually, it is possible to select a method of providing the inclined grooves 32b on both the left and right sides, or connecting directly to the circular arc grooves 32c from the vertical grooves 32a as shown in FIGS.
A rubber bush 8 formed of an elastic material such as rubber is assembled in the insertion hole 2 a formed in the case 2. The rubber bush 8 can be easily inserted into the lead wire 7 by increasing the outer inner diameter and decreasing the inner inner diameter.

  An upper cover 4 serving as a second coil end cover is assembled to the outside of the first coil end cover 3. The upper cover 4 is made of a thin ring-shaped resin, and the second upper cover 4 has a protruding piece 41 extending in the axial direction on the periphery of the ring-shaped main body 40, and the first coil end cover 3. In order to avoid the ribs 31 formed on the outer peripheral surface of the cylindrical portion 30a, the cylindrical portion 30a is formed at a plurality of locations at regular intervals in the circumferential direction. An engaging claw 41a is formed at the tip of the protruding piece 41, and the engaging claw 41a is formed on the outer peripheral surface of the cylindrical portion 30a of the first coil end cover 3 (see FIG. (Not shown), or engaged with the lower end edge. The lead wire 7 arranged on the plate surface of the coil end cover 3 is pressed and held by assembling the second upper cover 4 to the first coil end cover 3.

  The flange 5 is a disc-like lid that closes the open end of the case 2 of the electric motor. The flange 5 rotatably supports one end of a rotating shaft 6a that supports the rotor 6 of the electric motor, and an output shaft at one end of the rotating shaft 6a. Is provided in the plate surface. The flange 5 presses the rubber bush 8 by being assembled to the case 2 of the electric motor, thereby bringing the rubber bush 8 into close contact with the lead wire 7. Since the inner diameter of the rubber bush 8 is gradually reduced from the outside to the inside of the case 2 of the electric motor, the lead wire 7 can be reliably held by the assembly of the flange 5.

Next, the stator winding terminal processing method in the above-described electric motor will be described. The coil winding 10 is distributedly wound in the slots of the stator core 11, and the stator 1 in which the coil end of the coil winding 10 is laced with a binding thread. Is inserted into the case 2 of the electric motor through a shrink fitting process. Then, the first coil end cover 3 is inserted into the case 2 of the electric motor (see FIG. 4). The first coil end cover 3 is held in a state of being pressed against the inner surface of the case 2 of the motor by a plurality of axial ribs 31 formed on the outer peripheral surface of the cylindrical portion 30a.
The lead wire 10a from the winding 10 wound around the slot of the stator core 11 is formed by the concave portions 30c and 30d formed along the axial direction on the inner peripheral surface and the outer peripheral surface of the cylindrical portion 30a. The upper surface of the first coil end cover 3 is drawn out from the introduction grooves 32d and 32e to the arc groove 32c.

  On the other hand, the rubber bush 8 is inserted into the insertion hole 2a formed in the case 2 and assembled. Next, a plurality of lead wires 7 are inserted into the case 2 from the outside of the case 2 through the insertion hole 2a in which the rubber bush 8 is mounted. As shown in FIG. 7, the lead wire 7 is routed in the center direction along the groove 32a, and when the inclined groove 32b is not formed, the lead wire 7 is routed directly to the arc groove 32c. When the inclined groove 32b is provided, the lead wire 7 is bent at an acute angle and routed along the inclined groove 32b, and then routed to the arc groove 32c. Next, the core wire 7a of the lead wire 7 and the lead wire 10a are connected and connected, and are fixed by soldering or the like. The connection portion between the core wire 7a and the lead wire 10a can be more reliably insulated from the outside by being inserted into a rubber or resin tube.

  Next, the upper cover 4 serving as the second coil end cover is assembled on the first coil end cover 3. The upper cover 4 is assembled by engaging an engaging claw 41 a provided at the tip of the projecting piece 41 with a lower side edge of the first coil end cover 3. Thus, the lead wire 7 routed in the lead wire groove 32 of the first coil end cover 3 is held, and the lead wire groove 32 is prevented from coming off. Finally, the upper cover 4 is pressed against the first coil end cover 3 by fixing the flange 5 on the opening end of the case 2 of the electric motor, and the lead wire 7 is connected to the first coil end cover 3. The upper cover 4 is sandwiched and fixed, and the rubber bush 8 is brought into close contact with the lead wire 7 to complete the winding terminal processing of the stator of the motor.

  FIG. 8 shows a modification of the coil end cover 3 of FIG. 7, and the same portions are denoted by the same reference numerals and description of the same portions is omitted. In this case, a protrusion 33 such as a pin is provided at the radially inner end of the groove 32a following the arc groove 32c, and the lead wire 7 passed through the groove 32a is protruded through the insertion hole 2a formed in the case 2 of the electric motor. It abuts on the part 33 and divides into both sides, and is formed so as to follow the arc groove 32c. The lead wire 7 can be divided into two by the projection 33 and can be guided to the left and right arc grooves 32c. Other structures are the same as those of the coil end cover 3 described with reference to FIG.

  FIG. 9 shows a modification of the coil end cover 3 and the upper cover 4 of FIG. 7 as in FIG. 8, and in this case, protrusions 34a, 34b, and 34c are provided on both sides of the groove 32a of the coil end cover 3, respectively. It is set. On the other hand, the upper cover 4 is formed with holes 42a, 42b, 42c through which the protrusions 34a, 34b, 34c are passed. In this way, the protrusions 34a, 34b, 34c are inserted and assembled into the holes 42a, 42b, 42c, and the protrusions 34a, 34b, 34c are used as flange 5 side surfaces 5b and bush relief portions formed on the back surface of the flange 5. The protrusions 34a, 34b, 34c are deformed by being pressed by the recess 5c, and the lead wire 7 can be held by this deformation. Other structures are the same as those of the coil end cover 3 described with reference to FIG.

10 shows a modification of the coil end cover 3 of FIG. 7 as in FIG. 8. In this case, an arc groove 32c is formed halfway on the plate surface 30b of the upper surface of the coil end cover 3, and the plate surface A cutout 35 is formed in a part of 30b. The thermal protector 9 is inserted into the storage portion 36 through the notch 35 and is fixed in contact with the coil end. The storage portion 36 is slightly higher than the plate surface 30b. In this case, a notch 43 is formed in the upper cover 4 as shown in FIG. Then, the storage portion 36 and the cutout 43 have the same dimensions, and the cutout 43 is placed on the storage portion 36, thereby preventing the position of the upper cover 4 from being raised by the storage portion 36.
Also in this case, the other structure is the same as that of the coil end cover 3 described in FIG.

  According to the above embodiment, the stator 1 is inserted into the case 2 of the electric motor through the shrink fitting process. Then, after inserting the first coil end cover 3 into the case 2 of the electric motor, the lead wire 7 is inserted into the case 2 of the electric motor through the insertion hole 2a, and the lead wire 7 passed through the groove 32a is inserted. Since the core wire 7a of the lead wire 7 and the lead wire 10a from the coil winding are connected by holding through the arc groove 32c, the work of inserting the lead wire 7 into the case 2 of the motor is easy and can be easily bundled. Work can be done. Since the lead wire 7 is press-fitted into the arc groove 32c and is held by the arc groove 32c, the lead wire 7 can be prevented from coming off during the operation. Moreover, the lead wire 7 can be routed in the center direction along the groove 32a, and when the inclined groove 32b is not formed, it can be directly routed in the arc groove 32c. In the case where the inclined groove 32b is provided, the lead wire 7 can be bent at an acute angle and routed along the inclined groove 32b before being arranged in the arc groove 32c. When arranging the arc groove 32c via the inclined groove 32b, the lead wire 7 can be held more reliably. Furthermore, the lead wire 7 can press the rubber bush 8 by assembling the flange 5 to the case 2 of the electric motor by the side surface 5b of the flange 5 and the concave portion 5c as a bush escape portion formed on the back surface of the flange 5. Therefore, the lead wire 7 can be clamped by the rubber bush 8.

  When projecting portions 34 a, 34 b, 34 c are erected on both sides of the longitudinal groove 32 a of the coil end cover 3, they are pressed by the flange 5 side surface 5 b and the recess 5 c as a bush relief portion formed on the back surface of the flange 5. By doing so, the projecting portions 34a, 34b, and 34c are deformed, and the lead wire 7 can be held by this deformation.

  The present invention is not limited to the above-described embodiment. For example, the first coil end cover 3 is formed by forming arc grooves 32c on the entire circumference in two rows shown in FIG. Although the form has been described, three or four rows of arc grooves 32c may be formed. Further, the number of the protrusions 34a, 34b, and 34c in FIG. 9 is not necessarily three, and two may be used. Further, as in the modification of FIG. 10, the arc groove 32c can be formed in a part of the circumference. Further, as for the shape of the upper cover 4, the protruding piece 41 extending in the axial direction is formed on the peripheral edge of the ring-shaped main body 40, but any shape can be used as long as it can be assembled to the first coil end cover 3. Needless to say, it can also be used.

DESCRIPTION OF SYMBOLS 1 Stator 2 Motor case 2a Insertion hole 3 1st coil end cover 3
4 Second upper cover 4
5 Motor flange 6 Rotor 7 Lead wire 7a Core wire 8 Rubber bushing 10 Coil winding 10a Lead wire 11 Stator core 30 Ring-shaped main body 30a Tubular portion 30b Plate surface 30c, 30d Recessed portion 31 Rib 32 Lead wire groove 32a Vertical groove 32b Inclined groove 32c Arc groove 32d, 32e Introducing groove 33 Protruding part 34a, 34b, 34c Protruding part 40 Ring-shaped main body 41 Protruding piece 41a extending in the axial direction Engaging claw

Claims (11)

The stator is housed in the case of the electric motor, and the winding is distributed in the stator core slots, and the coil end of this winding is laced with a binding thread,
A coil end cover that is overlaid on the stator, covers the coil end, and is provided with a lead wire groove on the plate surface for press-fitting a lead wire;
In the electric motor, wherein the lead wire introduced into the case of the electric motor is disposed to a predetermined position by press-fitting into the lead wire groove of the coil end cover and connected to the winding end of the stator. Stator winding end processing structure.   2. The stator winding terminal processing structure according to claim 1, wherein a width of the lead wire groove of the coil end cover is set smaller than an outer diameter of the lead wire.   3. The electric motor according to claim 1, wherein the lead wire groove of the coil end cover changes in the circumferential direction after going from the vicinity of the lead wire insertion hole of the electric motor case to the center in the radial direction. Winding terminal processing structure of stator.   4. The stator winding terminal processing structure according to claim 3, wherein an angle formed by the lead wire groove of the coil end cover when the direction of the lead wire groove changes from the radial direction to the circumferential direction is an acute angle. .   5. The stator winding terminal processing structure according to claim 1, further comprising an upper cover that is overlapped and covered on the outside of the coil end cover and is pressed and fixed by a flange from the outside.   The protrusion part which press-deforms by the side surface of the said flange and a bush escape part, and fixes the said lead wire in the both sides of the groove | channel for radial direction lead wires of the said coil end cover is characterized by the above-mentioned. Winding terminal processing structure of a stator in an electric motor.   6. The stator winding terminal processing structure according to claim 5, wherein a lead wire groove of the coil end cover is provided with a protrusion on an inner diameter side of a portion whose direction is changed from the radial direction to the circumferential direction. .   8. A stator winding terminal in an electric motor according to claim 1, wherein the coil end cover is provided with a notch and a storage portion for inserting a thermal protector into contact with the coil end and fixing the coil end cover. Processing structure.   9. A stator winding terminal processing structure according to claim 1, wherein the lead wire insertion hole of the motor case is provided with a bush having a smaller inner diameter from the outside to the inside of the motor case. . The stator with the coil end of the winding wound distributed in the stator core slots is laced in the motor case,
Cover the coil end with a coil end cover,
Insert the lead wire into the lead wire insertion hole of the motor case,
A method for processing a winding end of a stator in an electric motor, wherein the lead wire is press-fitted into a lead wire groove provided on a plate surface of the coil end cover, and a tip end of the lead wire is connected to the winding end at a predetermined position. .   The lead wire is inserted into the lead wire insertion hole of the motor case from the outside to the inside of the motor case, and then along the lead wire groove formed in the radial direction on the plate surface of the coil end cover. The lead wire is routed inward from the lead wire insertion hole, and the lead wire tip is arranged along the lead wire groove formed by bending the lead wire groove at an acute angle from the middle of the lead wire groove formed in the radial direction. Then, the lead wire is press-fitted into the lead wire groove formed in the circumferential direction on the plate surface of the coil end cover and arranged, and the tip of the lead wire is connected to the winding end. The stator winding end processing method for an electric motor according to claim 10.

Images