TWI872960B - Motor stator wiring structure and manufacturing method thereof - Google Patents

Abstract

A motor stator wiring structure includes a plurality of bus bar terminals, an annular insulating clamping base and a plurality of three-phase and grounded enameled copper wires. The bus bar terminals are arranged in an annular and spaced apart manner, and each of the bus bar terminals has an L-shaped end welding portion. The annular insulating clamping base is formed by injection molding to secure the bus bar terminals. A plurality of three-phase and ground enameled copper wires are welded to corresponding L-shaped end welding portions of the bus bar terminals. The enameled copper wires are bent into a plurality of radial arc-shaped portions that are clamped with the bus bar terminals.

Description

Motor stator wiring structure and manufacturing method thereof

The present invention relates to a motor stator structure, in particular to a wiring structure and a manufacturing method of a motor stator.

The current motor stator has centralized winding, and the wiring method has evolved to a copper bar winding plate structure to meet the needs of automated assembly and increased rated current.

However, one of the disadvantages of the all-copper coil structure is that it produces too much copper waste, which makes it difficult to reduce the wiring cost of the motor stator. Therefore, how to reduce the wiring cost of the motor stator is an area that manufacturers are eager to improve.

In view of this, one purpose of the present invention is to provide a motor stator wiring structure and a manufacturing method thereof to solve the above-mentioned problems of the prior art.

To achieve the above-mentioned purpose, according to some embodiments of the present invention, a motor stator wiring structure includes a plurality of copper bar terminals, an annular insulating clamping seat, and a plurality of enameled copper wires for three phases and grounding. The copper bar terminals are arranged in annular intervals and separated, and the copper bar terminals have an L-shaped end welding portion. The annular insulating clamping seat is formed by injection molding to fix the copper bar terminals. The plurality of enameled copper wires for three phases and grounding are welded to the corresponding L-shaped end welding portions of the copper bar terminals, and the enameled copper wires are bent into a plurality of radial arc portions and clamped with the copper bar terminals to complete the wiring.

In some embodiments of the present invention, the copper bar terminal includes a hook portion for clamping the radial arc portion.

In some embodiments of the present invention, the hook portion includes a straight section and a bent section connected to each other, and the straight section and the bent section define an opening.

In some embodiments of the present invention, the opening faces downward and the bent section is located radially inward of the L-shaped terminal welding portion relative to the straight section.

In some embodiments of the present invention, the opening faces downward and the bent section is located radially outward of the L-shaped terminal welding portion relative to the straight section.

In some embodiments of the present invention, the opening faces upward and the bent section is located radially inward of the L-shaped terminal welding portion relative to the straight section.

In some embodiments of the present invention, the bent section of the hook portion has a U-shaped groove, and an opening of the U-shaped groove faces the straight section.

In some embodiments of the present invention, the hook portion clamps the corresponding radial arc portion to perform electric resistance welding.

In some embodiments of the present invention, the enameled copper wires are further bent along an axial direction of the motor to form a plurality of axial protrusions, which are welded to a plurality of corresponding current terminals.

In some embodiments of the present invention, the enameled copper wires are further bent into a plurality of circumferential arc portions along a circumferential direction of the motor, so that the enameled copper wires are disposed corresponding to at least one groove of the annular insulating clamping seat.

In some embodiments of the present invention, the hook is disposed toward an axis of the motor.

In some embodiments of the present invention, one end of the L-shaped terminal welding portion has a wire clamping groove, and the wire clamping groove is used to clamp and arc weld to the winding outlet wire end of a motor stator.

According to some embodiments of the present invention, the wire groove includes a welding flange formed by cutting and bending the L-shaped terminal welding portion.

According to some embodiments of the present invention, the L-shaped terminal welding portion further includes a stress release structure disposed adjacent to the wire clamping groove.

According to some embodiments of the present invention, a method for manufacturing a motor stator wiring structure includes: step (a) arranging a plurality of copper bar terminals in annular intervals along a circumferential direction of a motor, wherein each of the copper bar terminals has an L-shaped end welding portion; step (b) forming an annular insulating clamping seat by injection molding to fix the copper bar terminals; step (c) folding a plurality of enameled copper wires for three phases and grounding into a plurality of radial arc portions along a radial direction of the motor and clamping them with the copper bar terminals to complete wiring; and step (d) resistance welding the copper bar terminals on the corresponding L-shaped end welding portions.

According to some embodiments of the present invention, after completing step (c) and before performing step (d), the method further includes: fastening two semicircular ring fixtures around the assembled motor stator wiring structure.

According to some embodiments of the present invention, after completing step (d), the method further includes: removing the two semicircular ring fixtures, and taking out the finished product of the motor stator wiring structure.

In summary, the motor stator wiring structure of the present invention uses enameled copper wire bent into the required shape to replace the full round copper bar as the three-phase and grounding wiring structure, which can reduce copper waste in the process. For the U-phase, V-phase, W-phase and grounding wiring, the large current is changed to enter from the middle instead of the end, reducing the difference in current density between the inlet and outlet ends, and can offset the magnetic radiation interference caused by unidirectional entry. The method of using copper bars to clip enameled copper wires during resistance welding is easy to assemble and weld. The enameled copper wire itself is insulated and can be closer to the stator winding, which can reduce the height of the motor wiring.

In order to make the description of the present invention more detailed and complete, reference may be made to the attached drawings and various embodiments described below. The elements in the drawings are not drawn to scale and are provided only for the purpose of illustrating the present invention. Many practical details are described below to provide a comprehensive understanding of the present invention. However, a person skilled in the art should understand that the present invention can be implemented without one or more of the practical details, and therefore, these details should not be used to limit the present invention.

Please refer to Figures 1 to 3, the motor stator wiring structure 100 is composed of a copper bar portion and a copper wire winding coil portion. A plurality of copper bar terminals 108 are arranged in annular intervals and separated along the circumferential direction CD of the motor, and an annular insulating clamping seat 102 is formed by winding to fix the copper bar terminals 108, thereby forming the copper bar portion. The copper wire winding coil portion includes a plurality of enameled copper wires 110, and the enameled copper wires 110 include a plurality of enameled copper wires corresponding to the U phase, V phase, W phase and ground. The enameled copper wire 110 is bent to form a circumferential arc portion 110b extending along the circumferential direction CD of the motor, a radial arc portion 110c extending along the radial direction of the motor, and an axial protrusion 110a extending along the axial direction AD of the motor. The radial arc portion 110c extending along the radial direction is used for welding (such as resistance welding or laser welding) on the L-shaped end welding portion 109a of the copper bar terminal 108. With this design, since the enameled copper wire 110 itself is insulated, it can be closer to the stator winding, which can reduce the height of the motor connection. The one with the largest axial height among the plurality of axial protrusions 110a can be used as the current input/output end, that is, the input/output terminal (106a, 106b, 106c) of the motor is used to be welded to the axial protrusion 110a of the enameled copper wire 110. With this design, the large current enters from the middle of the copper wire winding coil composed of the enameled copper wire 110 instead of the known end, thereby reducing the current density difference between the input end and the output end, and offsetting the magnetic radiation interference caused by unidirectional entry. The circumferential arc portion 110 b makes the enameled copper wire 110 correspond to the groove of the insulating clamping seat 102 , so that the enameled copper wire 110 is arranged in the insulating clamping seat 102 to form a copper wire winding drum.

In the first embodiment, the copper bar terminal 108 includes two forms, namely, the copper bar terminal 108a and the copper bar terminal 108b. The copper bar terminal 108a includes an L-shaped end welding portion 109a and a wire clamping groove 109b, but does not have the hook portion of the following embodiments. The wire clamping groove 109b is used for arc welding on the winding outlet wire end of a motor stator (for example, the winding wire end 209 in Figure 4). In the first embodiment, the wire clamping groove 109b includes a welding flange 109c, and one end of the L-shaped end welding portion 109a is cut and bent to simultaneously form the welding flange 109c and the wire clamping groove 109b. The stator winding outlet wire end can be placed in the wire clamping groove 109b and contact the welding flange 109c to facilitate arc welding. The copper bar terminal 108b is different from the copper bar terminal 108a in that the L-shaped terminal welding portion 109a is slightly bent to correspond to the position of the winding outlet terminal.

Please refer to Figures 4 to 6, the motor stator wiring structure 200 is composed of a copper bar portion and a copper wire winding coil portion. A plurality of copper bar terminals 208 are arranged in annular intervals and separated along the circumferential direction CD of the motor, and an annular insulating clamping seat 202 is formed by winding to fix the copper bar terminals 208, thereby forming the copper bar portion. The copper wire winding coil portion includes a plurality of enameled copper wires 210, and the enameled copper wires 210 include U-phase, V-phase, W-phase and grounded enameled copper wires. The enameled copper wire 210 is bent to form a circumferential arc portion 210b extending along the circumferential direction CD of the motor, a radial arc portion 210c extending along the radial direction RD of the motor, and an axial protrusion 210a extending along the axial direction AD of the motor. The radial arc portion 210c extending along the radial direction is used to be welded to the copper bar terminal 208. With this design, since the enameled copper wire 210 itself is insulated, it can be closer to the stator winding, which can reduce the height of the motor connection. The axial protrusion 210a with the maximum axial height can be used as a current input terminal, and the input/output terminals (206a, 206b, 206c) are used to be welded to the axial protrusion 210a of the enameled copper wire 210. In the second embodiment, the bottom end of the input/output terminal (206a, 206b, 206c) has a buckle 207 for clamping the axial protrusion 210a of the enameled copper wire 210 to facilitate resistance welding. This design allows the large current to enter the middle of the copper wire winding drum composed of the enameled copper wire 210 instead of the known end, reducing the current density difference between the entry end and the exit end, and offsetting the magnetic radiation interference caused by unidirectional entry. The circumferential arc portion 210b makes the enameled copper wire 210 correspond to the groove of the insulating clamping seat 202, so that the enameled copper wire 210 is arranged on the insulating clamping seat 202 to form a copper wire winding drum.

In the second embodiment, the copper bar terminal 208 includes a single copper bar terminal 208a. The copper bar terminal 208a includes an L-shaped end welding portion 209a, a clamping groove 209b and a hook portion 209c. The clamping groove 209b is used to clamp the winding outlet wire end 209 of a motor stator by arc welding (refer to Figure 4). In the second embodiment, the hook portion 209c has a straight section and a bent section connected to each other, and the bent section has a U-shaped groove, wherein an opening of the U-shaped groove faces the straight section, and the straight section and the bent section define an opening 209d facing downward, and the bent section is located radially inward of the L-shaped end welding portion 209a relative to the straight section, that is, the bent section is closer to the motor axis relative to the straight section. The hook portion 209c is used to clamp the radial arc portion 210c extending radially of the enameled copper wire 210 to facilitate electric resistance welding. The hook portion 209c has a U-shaped groove 209e to facilitate clamping the radial arc portion 210c of the enameled copper wire 210. The two outer sides adjacent to the wire clamping groove 209b have a stress release structure 209f, which releases the stress generated by the wire clamping by reducing the size or making a groove, thereby avoiding structural damage caused during the manufacturing process.

Please refer to Figures 7 to 9, the motor stator wiring structure 300 is composed of an injection-molded copper bar portion and a copper wire winding coil portion. A plurality of copper bar terminals 308 are arranged in an annular spaced and separated manner along the circumferential direction CD of the motor, and an annular insulating clamping seat 302 is formed by injection molding to fix the copper bar terminals 308, thereby forming an injection-molded copper bar portion. The copper wire winding coil portion includes a plurality of enameled copper wires 310, and the enameled copper wires 310 include U-phase, V-phase, W-phase and grounded enameled copper wires. The enameled copper wire 310 is bent to form a circumferential arc portion 310b extending along the circumferential direction CD of the motor, a radial arc portion 310c extending along the radial direction RD of the motor, and an axial protrusion 310a extending along the axial direction AD of the motor. The radial arc portion 310c extending along the radial direction is used for welding to the copper bar terminal 308. The axial protrusion 310a with the maximum axial height can be used as a current input terminal. The input/output terminal is used to be welded to the axial protrusion 310a of the enameled copper wire 310. This design allows a large current to enter the middle of the copper wire winding coil composed of the enameled copper wire 310 instead of the conventional end, thereby reducing the current density difference between the entry end and the exit end, and offsetting the magnetic radiation interference caused by unidirectional entry. The circumferential arc portion 310b allows the enameled copper wire 310 to correspond to the groove of the insulating clamping seat 302, so that the enameled copper wire 310 is arranged in the insulating clamping seat 302 to form a copper wire winding coil.

In the third embodiment, the copper bar terminal 308 includes a single copper bar terminal 308a. The copper bar terminal 308a includes an L-shaped end welding portion 309a, a clamping groove 309b and a hook portion 309c. The clamping groove 309b is used to clamp the winding wire end of a motor stator (such as the winding wire end 209 in Figure 4) by arc welding. In the third embodiment, the hook portion 309c has a straight section and a bent section connected to each other, and the bent section has a U-shaped groove with an opening facing the straight section, and the straight section and the bent section define an opening 309d facing upward, and the bent section is located radially outward of the L-shaped end welding portion 309a relative to the straight section, that is, the bent section is farther away from the motor axis than the straight section. The hook portion 309c is used to clamp the radial arc portion 310c extending along the radial direction RD of the enameled copper wire 310 to facilitate resistance welding. With this design, since the enameled copper wire 110 itself is insulated, it can be closer to the stator winding, which can reduce the motor connection height. The L-shaped terminal welding portion 309a has a U-shaped groove 309e to facilitate clamping the radial arc portion 310c of the enameled copper wire 310. The two outer sides adjacent to the clamping groove 309b have a stress release structure 309f. The stress generated by the clamping is released by reducing the size or making a groove, etc., to avoid structural damage caused during the manufacturing process.

Please refer to Figures 10 to 12, the motor stator wiring structure 400 is composed of a copper bar portion and a copper wire winding coil portion. A plurality of copper bar terminals 408 are arranged in annular intervals and separated along the circumferential direction CD of the motor, and an annular insulating clamping seat 402 is formed by winding to fix the copper bar terminals 408, thereby forming the copper bar portion. The copper wire winding coil portion includes a plurality of enameled copper wires 410, and the enameled copper wires 410 include U-phase, V-phase, W-phase and grounded enameled copper wires. The enameled copper wire 410 is bent to form a radial arc portion 410c extending along the radial direction RD of the motor, a circumferential arc portion 410b extending along the circumferential direction CD of the motor, and an axial protrusion extending along the axial direction AD of the motor. It should be noted that for the purpose of simplicity, the axial protrusion is not shown in this embodiment, but its structure is the same or similar to the corresponding structure of the first, second, and third embodiments described above. The axial protrusion with the maximum axial height can be used as the current input end. The input/output terminal is used to be welded to the axial protrusion of the enameled copper wire 410. This design allows the large current to enter the middle of the copper wire winding coil composed of the enameled coil 410 instead of the known end, reducing the current density difference between the entry end and the exit end, and offsetting the magnetic radiation interference caused by unidirectional entry. The circumferential arc portion 410b makes the enameled copper wire 410 correspond to the groove of the insulating clamping seat 402, so that the enameled copper wire 410 is arranged on the insulating clamping seat 402 to form a copper wire winding coil.

In the fourth embodiment, the copper bar terminal 408 includes two types, namely, a copper bar terminal 408a and a copper bar terminal 408b. Both types of copper bar terminals (408a, 408b) include an L-shaped end welding portion 409a, a clamping groove 409b and a hook portion 409c. The clamping groove 409b is used to clamp the winding outlet wire end of a motor stator (e.g., the winding wire end 209 in FIG. 4) by arc welding. The hook portion 409c of the copper bar terminal (408a, 408b) has a straight section and a bent section connected to each other, and the bent section has a U-shaped groove, whose opening faces the straight section, and the straight section and the bent section define an opening 409d both facing downward. The hook portion 409c of the copper bar terminal 408b and the bent section are located radially inward of the L-shaped terminal welding portion 409a relative to the straight section, that is, the bent section is closer to the motor axis relative to the straight section. The hook portion 409c of the copper bar terminal 408a is located radially outward of its L-shaped terminal welding portion 409a. The hook portion 409c is used to clamp the radial arc portion 410c of the enameled copper wire 410 to facilitate resistance welding. With this design, since the enameled copper wire 110 itself is insulated, it can be closer to the stator winding and the motor connection height can be reduced. The hook portion 409c has a U-shaped groove 409e to facilitate clamping the radial arc portion 410c of the enameled copper wire 410. The two outer sides adjacent to the wire clamping groove 409b are provided with stress release structures 409f, which can release the stress generated by the wire clamping by reducing the size or making grooves, thereby avoiding structural damage caused during the manufacturing process.

Please refer to Figures 13 to 16 at the same time. Figures 13 to 15 are schematic diagrams of some steps of a method for manufacturing a motor stator wiring structure 500 according to some embodiments of the present invention, and Figure 16 is a flow chart of a method for manufacturing a motor stator wiring structure 600 according to some embodiments of the present invention.

In step 602 of method 600, a copper bar injection molding process is performed to arrange a plurality of copper bar terminals (refer to the components 108, 208, 308, 408, 508 shown in Figures 1 to 15 above) in an annularly spaced and separated manner along a circumferential direction of the motor, and then an annular insulating clamping seat (102, 202, 302, 402, 502) is formed by injection molding to fix the copper bar terminals, wherein each copper bar terminal has an L-shaped end welding portion (109a, 209a, 309a, 409a).

In step 604 (refer to FIG. 13 ), the copper bar is wired by buckling, for example, the grounding enameled copper wire 510a, the U-phase enameled copper wire 510b, the V-phase enameled copper wire 510c and the W-phase enameled copper wire 510d are bent into the required shapes in sequence and then buckled and positioned with the corresponding copper bar terminals, for example, they are bent into a plurality of radial arc portions along the radial direction of the motor and clamped with the copper bar terminals to complete the wiring. In one embodiment, the grounding enameled copper wire 510a, the U-phase enameled copper wire 510b, the V-phase enameled copper wire 510c and the W-phase enameled copper wire 510d are easy to assemble and weld after being fixed in position. Compared to the conventional copper bar tie-in reel, the enameled copper wire is bent into the required shape for the U phase, V phase, W phase and grounding. Compared to the cutting process of the full round copper bar, the bending of the enameled copper wire produces almost no waste, and the enameled copper wire itself is insulated, which can be closer to the winding, and the tie-in height is reduced. In addition, for the U phase, V phase, W phase and grounding, the case has the large current enter from the middle of the copper wire tie-in reel composed of enameled copper wire instead of the conventional way of entering from the end, thereby reducing the difference in current density between the entry end and the exit end, thereby reducing the amount of copper used. The large current enters from the middle instead of the end, and the two-way current can offset the magnetic radiation interference caused by the unidirectional entry.

In step 606 (see FIG. 14 ), a fixture, such as two semicircular ring fixtures 520a and 520b, is fastened around the assembled motor stator wiring structure 500 to facilitate subsequent welding.

In step 608 (see FIG. 15 ), resistance welding is performed, for example, the resistance welding electrode heads 530a and 530b are closely attached to the parts to be welded, and resistance welding is performed.

In step 610, all the parts to be welded are subjected to resistance welding, and then the jigs are removed, for example, the two semi-circular jigs 520a and 520b are removed, and the finished motor stator wiring structure 500 is taken out.

In summary, the motor stator wiring structure of the present invention uses enameled copper wire bent into the required shape to replace the full round copper bar as the three-phase and grounding wiring structure, which can reduce copper waste in the process. For the U-phase, V-phase, W-phase and grounding wiring, the large current is changed to enter from the middle instead of the end, reducing the current density difference between the inlet and outlet ends, and can offset the magnetic radiation interference caused by unidirectional entry. The method of using copper bars to clip enameled copper wires during resistance welding is easy to assemble and weld. The enameled copper wire itself is insulated and can be closer to the stator winding, which can reduce the height of the motor wiring.

Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined in the attached patent application.

100: Motor stator wiring structure

102: Insulation clamp seat

106a, 106b, 106c: Input/output terminals

108: Copper busbar terminal

108a: Copper busbar terminal

108b: Copper busbar terminal

109a: L-shaped end welding part

109b: Wire duct

109c: Welding flange

110: Enameled copper wire

110a: axial protrusion

110b: Circumferential arc portion

110c: radial arc portion

200: Motor stator wiring structure

202: Insulation clamp seat

206a, 206b, 206c: Input/output terminals

207: Buckle

208: Copper busbar terminal

208a: Copper busbar terminal

209: Winding outlet terminal

209a: L-shaped end welding part

209b: Wire groove

209c: hook

209d: Opening

209e: U-shaped groove

209f: Stress relief structure

210: Enameled copper wire

210a: axial protrusion

210b: Circumferential arc portion

210c: radial arc portion

300: Motor stator wiring structure

302: Insulation clamp seat

308: Copper busbar terminal

308a: Copper busbar terminal

309a: L-shaped end welding part

309b: Wire groove

309c: hook

309d: Opening

309e: U-shaped groove

309f: Stress relief structure

310: Enameled copper wire

310a: axial protrusion

310b: Circumferential arc portion

310c: radial arc portion

400: Motor stator wiring structure

402: Insulation clamp seat

408: Copper busbar terminal

408a: Copper busbar terminal

408b: Copper busbar terminal

409a: L-shaped end welding part

409b: Wire duct

409c: hook part

409d: Opening

409e: U-shaped groove

409f: Stress relief structure

410: Enameled copper wire

410b: Circumferential arc portion

410c: radial arc portion

500: Motor stator wiring structure

502: Insulation clamp seat

510a: Grounding enameled copper wire

510b: U-phase enameled copper wire

510c: V-phase enameled copper wire

510d: W-phase enameled copper wire

520a, 520b: fixture

530a, 530b: electrode head

600:Methods

602~610: Steps

AD: Axial

RD: radial direction

CD: Circumferential direction

In order to make the above and other purposes, features, advantages and embodiments of the present invention more clearly understandable, the attached drawings are described as follows: FIG. 1 is a three-dimensional diagram showing the motor stator wiring structure according to the first embodiment of the present invention. FIG. 2 is an exploded view showing the motor stator wiring structure of FIG. 1. FIG. 3 is an enlarged view showing a plurality of copper bar terminals and a single copper bar terminal of the motor stator wiring structure of FIG. 1. FIG. 4 is a three-dimensional diagram showing the motor stator wiring structure according to the second embodiment of the present invention. FIG. 5 is an exploded view showing the motor stator wiring structure of FIG. 4. FIG. 6 is an enlarged view showing a plurality of copper bar terminals and a single copper bar terminal of the motor stator wiring structure of FIG. 4. FIG. 7 is a three-dimensional diagram showing the motor stator wiring structure according to the third embodiment of the present invention. FIG. 8 is an exploded view showing the motor stator wiring structure of FIG. 7. FIG. 9 is an enlarged view showing a plurality of copper bar terminals and a single copper bar terminal of the motor stator wiring structure of FIG. 7. FIG. 10 is a three-dimensional diagram showing the motor stator wiring structure according to the fourth embodiment of the present invention. FIG. 11 is an exploded view showing the motor stator wiring structure of FIG. 10. FIG. 12 is a plurality of copper bar terminals and an enlarged view of the copper bar terminals of the motor stator wiring structure of FIG. 10. FIGS. 13 to 15 are schematic diagrams showing some steps of the manufacturing method of the motor stator wiring structure according to some embodiments of the present invention. Figure 16 shows a flow chart of a method for manufacturing a motor stator wiring structure according to some embodiments of the present invention.

100: Motor stator wiring structure

102: Insulation clamp seat

106a: Input/output terminal

106b: Input/output terminal

106c: Input/output terminals

108: Copper busbar terminal

110: Enameled copper wire

110a: Axial protrusion

110b: Circumferential arc portion

110c: radial arc portion

CD: Circumferential direction

Claims (16)

A motor stator wiring structure is applied to a motor and includes: a plurality of copper bar terminals arranged at annular intervals, each of which has an L-shaped terminal welding portion; an annular insulating clamping seat formed by injection molding to fix the copper bar terminals; and a plurality of three-phase and grounding enameled copper wires welded to the L-shaped terminal welding portions corresponding to the copper bar terminals, wherein the enameled copper wires are bent along a radial direction of the motor into a plurality of radial arc portions and clamped with the copper bar terminals to complete the wiring, wherein one end of the L-shaped terminal welding portion has a wire clamping groove for clamping and welding a winding outlet wire end of the motor stator. The motor stator wiring structure of claim 1, wherein the L-shaped end welding portion includes a hook portion for clamping the corresponding radial arc portion. The motor stator wiring structure of claim 2, wherein the hook portion includes a straight section and a bent section connected to each other, and the straight section and the bent section define an opening. The motor stator wiring structure of claim 3, wherein the opening faces downward, and the bent section is located radially inward of the L-shaped end welding portion relative to the straight section. The motor stator wiring structure of claim 3, wherein the opening faces downward, and the bent section is located radially outward of the L-shaped end welding portion relative to the straight section. The motor stator wiring structure of claim 3, wherein the opening faces upward, and the bent section is located radially inward of the L-shaped end welding portion relative to the straight section. As in claim 3, the motor stator wiring structure, wherein the bent section of the hook has a U-shaped groove, and an opening of the U-shaped groove faces the straight section. The motor stator wiring structure of claim 2, wherein the hook portion clamps the corresponding radial arc portion for electric resistance welding. As in claim 2, the motor stator wiring structure, wherein the enameled copper wires are further bent along an axial direction of the motor to form a plurality of axial protrusions, which are welded to a plurality of corresponding current terminals. As in claim 2, the motor stator wiring structure, wherein the enameled copper wires are further bent into a plurality of circumferential arc portions along a circumferential direction of the motor, so that the enameled copper wires are arranged corresponding to at least one groove of the annular insulating clamping seat. The motor stator wiring structure of claim 2, wherein the hook is arranged toward an axis of the motor. The motor stator wiring structure of claim 1, wherein the wire slot includes a welding flange formed by cutting and bending the L-shaped end welding portion. The motor stator wiring structure of claim 1, wherein the L-shaped end welding portion further includes a stress release structure, which is arranged adjacent to the wire clamping groove. A method for manufacturing a motor stator wiring structure comprises: step (a) arranging a plurality of copper bar terminals in annular intervals along a circumferential direction of a motor, wherein each of the copper bar terminals has an L-shaped terminal welding portion; step (b) forming an annular insulating clamping seat by injection molding to fix the copper bar terminals; step (c) bending a plurality of enameled copper wires for three phases and grounding along a radial direction of the motor into a plurality of radial arc portions to clamp the copper bar terminals to complete wiring; and step (d) resistance welding the copper bar terminals to the corresponding L-shaped terminal welding portions, wherein one end of the L-shaped terminal welding portion has a wire clamping groove for clamping and welding a winding outlet wire end of the motor stator. The method for manufacturing the motor stator wiring structure of claim 14 further includes, after completing step (c) and before performing step (d), fastening two semicircular ring fixtures around the assembled motor stator wiring structure. The method for manufacturing the motor stator wiring structure of claim 15 further includes, after completing step (d), removing the two semicircular ring fixtures and taking out the finished product of the motor stator wiring structure.

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