Motor stator, motor and use method thereof

Abstract

The invention relates to a motor stator, a motor and a use method thereof, the motor stator comprises a stator body and flat wire conductors, the circumference of the stator body is provided with through grooves which are arranged at intervals in the vertical direction, each through groove is internally provided with four layers of flat wire conductors, a plug-in hairpin is inserted into the through groove to form a three-phase winding, each phase winding outputs four joints, and the four joints are connected with the flat wire conductors. The connector is led out through the plugging wire cards, the number of the plugging wire cards is twelve, the twelve plugging wire cards are plugged in the corresponding through grooves respectively, and the plugging wire cards correspondingly connected with the copper bars achieve corresponding connection. According to the motor stator adopting the technical scheme, the original advantages are reserved, the stator is a three-phase winding, each phase outputs four joints, totally twelve joints, four winding schemes of a single Y shape, a single triangle, a double Y shape and a double triangle can be realized through different connection modes of the twelve joints by using a standard copper bar, and the stator is simple in structure and convenient to operate. The problem that the tool clamp is frequently replaced when the flat wire motor is produced is solved, the production line investment is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to a motor, and in particular to a motor stator and a motor and a use method thereof. Background Art

[0002] A motor (including an electric motor and a generator) is a device that converts electrical energy into mechanical energy (or mechanical energy into electrical energy) based on the principle of electromagnetic induction. It can be used as a power source or power generation device for various electrical appliances such as household appliances, various machines such as electric motorcycles, and electric vehicles. Motors can be divided into DC motors and AC motors according to the type of working electricity, and AC motors can be divided into single-phase motors and multi-phase motors (such as three-phase motors, etc.). The motor includes a stator and a rotor, and windings are arranged in the stator core slots of the stator. There are two types of existing motor windings: wave windings and stacked windings. For segmented hairpin winding motors using preformed flat wire conductors, stacked windings are used. The hairpin of the preformed flat wire conductor includes a non-welded portion at the top, straight portions on both sides, and a welded portion at the bottom.

[0003] Different vehicle models and different application scenarios have different performance requirements for motors, and the motors used are also different. At present, although each three-phase motor has a three-phase winding, each phase winding outputs one connector, a total of three connectors, which can only be connected by using a standard copper busbar. When the motor factory produces different motors according to order requirements, it needs to frequently replace the tooling fixtures, which has high production line investment and low production efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a motor stator that can meet the various performance requirements of motors in different vehicle models and different application scenarios, and at the same time solve the problem of frequent replacement of tooling and fixtures when producing the above-mentioned different winding schemes of flat wire motors, thereby reducing production line investment and improving production efficiency.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A motor stator comprises a stator body and a flat wire conductor, wherein the stator body is provided with spaced vertical through slots on its circumference, and each of the through slots is provided with four layers of the flat wire conductor. A copper busbar is also provided, and the flat wire conductor comprises a plug-in hairpin and a plug-in wiring card, and the plug-in hairpin is inserted into the through slot to form a three-phase winding, and each phase winding outputs four connectors. There are twelve plug-in wiring cards, and the twelve plug-in wiring cards are respectively plugged into corresponding through slots, and the copper busbar is connected to the plug-in wiring cards to realize corresponding connection methods.

[0007] The motor stator adopting the above technical solution retains the advantages of the original hairpin motor stator, such as high slot fill rate, good heat dissipation, small size and low AC loss. In addition, since the stator is a three-phase winding, each phase outputs four connectors, for a total of twelve connectors. By using standard copper bars to connect the twelve connectors in different ways, four winding solutions, namely single Y-shape, single triangle, double Y-shape and double triangle, can be realized. This can meet the various performance requirements of motors for different vehicle models and application scenarios, and at the same time solve the problem of frequent replacement of tooling fixtures when producing the above-mentioned different winding solutions for flat wire motors, thereby reducing production line investment and improving production efficiency.

[0008] It is further defined that the number of through slots is forty-eight, and the plug-in hairpins are six first hairpins, thirty-six second hairpins, twelve third hairpins and thirty-six fourth hairpins, wherein the plug-in hairpins include a connecting portion at an upper end, a straight line insertion portion on a left side, a straight line insertion portion on a right side and a welding portion at a lower end, and the line card includes an insertion end at a lower part and a wiring end at an upper part.

[0009] It is further defined that the welding portion of the plug-in hairpin of the first layer in the same through slot or the bottom of the insertion end of the lower part of the wire card is fixedly connected to the welding portion of the plug-in hairpin of the second layer; the welding portion of the plug-in hairpin of the fourth layer in the same through slot or the bottom of the insertion end of the lower part of the wire card is fixedly connected to the welding portion of the plug-in hairpin of the third layer.

[0010] Furthermore, in the above technical solution, the fixed connection is welding.

[0011] In addition, the present invention provides a motor, comprising the motor stator described in the above technical solution.

[0012] Again, the present invention provides a method for using the motor stator, that is, different wiring methods. There are four different wiring methods in total.

[0013] In the first wiring method, there are four copper bars, the first copper bar connects the ninth, eleventh, and twelfth joints; the second copper bar connects the second and fifth joints; the third copper bar connects the first and third joints; the fourth copper bar connects the fourth and sixth joints; the seventh, eighth, and tenth joints are U, V, and W three-phase outputs, forming a single Y-shaped connection. This connection method has a large torque and a small line current, and can be used with a low-cost controller, and is realized by welding different joints with standard copper bars.

[0014] The second wiring method is that there are six copper bars, the first copper bar is connected to the eighth and twelfth joints to output V phase; the second copper bar is connected to the ninth and tenth joints to output W phase; the third copper bar is connected to the seventh and eleventh joints to output U phase; the fourth copper bar is connected to the first and third joints; the fifth copper bar is connected to the second and fifth joints; the sixth copper bar is connected to the fourth and sixth joints to form a single triangle connection. This connection method has moderate phase current and higher speed than the Y-shaped connection, which is suitable for high-speed tricycles and is achieved by welding different joints with standard copper bars.

[0015] The third wiring method is that there are four copper bars, the first copper bar connects the fifth and eighth joints to output V phase; the second copper bar connects the sixth and tenth joints to output W phase; the third copper bar connects the third and seventh joints to output U phase; the fourth copper bar connects the first, second, fourth, ninth, eleventh and twelfth joints to form a double Y-shaped connection. This connection method has a high speed and is suitable for electric motorcycle power. It is achieved by welding different joints with standard copper bars.

[0016] The fourth wiring method is that there are four copper bars, the first copper bar connects the second, sixth, tenth and eleventh joints to output V phase; the second copper bar connects the first, fifth, eighth and ninth joints to output W phase; the third copper bar connects the third, fourth, seventh and twelfth joints to output U phase, forming a double triangle connection. This connection method is suitable for high-power and high-speed motors, and is achieved by welding different joints with standard copper bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1a is a front view of the first card issuing device of the present invention;

[0018] Figure 1b It is a right side view of the first hairpin of the present invention;

[0019] Figure 1c is a bottom view of the first hairpin of the present invention;

[0020] Figure 2a is a front view of a second card issuing device of the present invention;

[0021] Figure 2b It is a right side view of the second hairpin of the present invention;

[0022] Figure 2c is a bottom view of a second hairpin of the present invention;

[0023] Figure 3a is a front view of a third card issuing device of the present invention;

[0024] Figure 3b It is a right side view of the third hairpin of the present invention;

[0025] Figure 3c is a bottom view of a third hairpin of the present invention;

[0026] Figure 4a is a front view of a fourth card issuing device of the present invention;

[0027] Figure 4b It is a right side view of the fourth hairpin of the present invention;

[0028] Figure 4c is a bottom view of a fourth hairpin of the present invention;

[0029] Figure 5a It is a front view of the plug-in wiring card of the present invention;

[0030] Figure 5b It is a right side view of the plug-in wiring card of the present invention;

[0031] Figure 5c This is a bottom view of the plug-in wiring card of the present invention;

[0032] Figure 6 It is a schematic diagram of a single Y-shaped connection of the present invention;

[0033] Figure 7 It is a schematic diagram of a single triangle connection of the present invention;

[0034] Figure 8 It is a schematic diagram of a double Y-shaped connection of the present invention;

[0035] Fig. 9 This is a schematic diagram of a double triangle connection of the present invention;

[0036] Fig.10 It is a three-dimensional schematic diagram of a motor stator of the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] like Figure 1a , Figure 1b , Figure 1c , Figure 2a , Figure 2b , Figure 2c , Figure 3a , Figure 3b , Figure 3c , Figure 4a , Figure 4b , Figure 4c , Figure 5a , Figure 5b , Figure 5c and Fig.10As shown, a motor stator includes a stator body 10, six first hairpins 1, thirty-six second hairpins 2, twelve third hairpins 3, thirty-six fourth hairpins 4 and twelve plug-in wire cards 5, wherein the first hairpins 1, the second hairpins 2, the third hairpins 3 and the fourth hairpins 4 all include a connecting portion 41 at the upper end, a linear insertion portion 42 at the left side, a linear insertion portion 43 at the right side and a welding portion 44 at the lower end, and forty-eight through slots 11 are arranged in a spaced vertical direction on the circumference of the stator body 10; wherein each of the through slots 11 is provided with a hairpin or a plug-in wire card, and each through slot 11 is provided with four layers.

[0039] The specific cards or wiring cards inserted in the 48 slots are as follows:

[0040]

[0041]

[0042]

[0043] In the above table, the first hairpin 1 left refers to the left straight line insertion portion of the first first hairpin, the first hairpin 1 right refers to the right straight line insertion portion of the first first hairpin, the first hairpin 2 left refers to the left straight line insertion portion of the second first hairpin, the first hairpin 2 right refers to the right straight line insertion portion of the second first hairpin, plug-in wire card 1 refers to the first plug-in wire card, and the same applies to the others; plug-in wire card 1 refers to the first plug-in wire card, and plug-in wire card 2 refers to the second plug-in wire card; the outermost layer refers to the outermost layer of the through slot 10, and similarly, in sequence, the second layer, the third layer, and the fourth layer refer to the innermost layer of the through slot 10.

[0044] The plug-in hairpin and the plug-in wire card are both flat wire conductors. The plug-in hairpin is inserted into the through slot 10 to form a three-phase winding. Each phase of the winding outputs four connectors, which are led out through the plug-in wire card 5. There are twelve plug-in wire cards 5, and the twelve plug-in wire cards 5 are respectively plugged into the corresponding through slots 10. The copper busbar 6 is connected to the plug-in wire cards 5 to achieve corresponding connection methods; the welding part of the first layer of the plug-in hairpin in the same through slot 10 or the bottom of the insertion end of the lower part of the wire card is fixedly connected to the welding part of the second layer of the plug-in hairpin; the welding part of the fourth layer of the plug-in hairpin in the same through slot or the bottom of the insertion end of the lower part of the wire card is fixedly connected to the welding part of the third layer of the plug-in hairpin, and the fixed connection is welding.

[0045] It also includes a copper busbar, which is a standard and commonly used accessory and is used to connect the plug-in wiring cards in parallel.

[0046] The use of this motor stator, that is, different wiring methods, there are four different wiring methods:

[0047] like Figure 6 As shown, in the first wiring method, there are four copper bars, the first copper bar 601 is connected to the ninth joint 509, the eleventh joint 511, and the twelfth joint 512; the second copper bar 602 is connected to the second joint 502 and the fifth joint 505; the third copper bar 603 is connected to the first joint 501 and the third joint 503; the fourth copper bar 604 is connected to the fourth joint 504 and the sixth joint 506; the seventh, eighth, and tenth joints are U, V, and W three-phase outputs, forming a single Y-shaped connection. This connection method has a large torque and a small line current, and can be used with a low-cost controller, and is realized by welding different joints with standard copper bars.

[0048] like Figure 7 As shown, in the second wiring method, there are six copper bars, the first copper bar 605 is connected to the eighth and twelfth joints to output as V phase; the second copper bar 606 is connected to the ninth joint 509 and the tenth joint 510 to output as W phase; the third copper bar 607 is connected to the seventh joint 507 and the eleventh joint 511 to output as U phase; the fourth copper bar 608 is connected to the first joint 501 and the third joint 503; the fifth copper bar 609 is connected to the second joint 502 and the fifth joint 505; the sixth copper bar 610 is connected to the fourth joint 504 and the sixth joint 506 to form a single triangle connection. This connection method has moderate phase current and higher speed than the Y-shaped connection, which is suitable for high-speed tricycles and is achieved by welding different joints with standard copper bars.

[0049] like Figure 8 As shown, the third wiring method, there are four copper bars, the first copper bar 611 connects the fifth joint 505 and the eighth joint 508 to output as V phase; the second copper bar 612 connects the sixth joint 506 and the tenth joint 510 to output as W phase; the third copper bar 613 connects the third joint 503 and the seventh joint 507 to output as U phase; the fourth copper bar 614 connects the first joint 501, the second joint 502, the fourth joint 504, the ninth joint 509, the eleventh joint 511, and the twelfth joint 512 to form a double Y-shaped connection. This connection method has a high speed and is suitable for electric motorcycle power. It is realized by welding different joints with standard copper bars.

[0050] like Fig. 9As shown, in the fourth wiring method, there are four copper bars, the first copper bar 615 connects the second joint 502, the sixth joint 506, the tenth joint 510, and the eleventh joint 511 to output as V phase; the second copper bar 616 connects the first joint 501, the fifth joint 505, the eighth joint 508, and the ninth joint 509 to output as W phase; the third copper bar 617 connects the third joint 503, the fourth joint 504, the seventh joint 507, and the twelfth joint 512 to output as U phase, forming a double triangle connection. This connection method can be applied to high-power and high-speed motors, and is achieved by welding different joints with standard copper bars.

[0051] The motor stator adopting the above technical solution retains the advantages of the original hairpin motor stator, such as high slot fill rate, good heat dissipation, small size and low AC loss. In addition, since the stator is a three-phase winding, each phase outputs four connectors, for a total of twelve connectors. By using standard copper bars to connect the twelve connectors in different ways, four winding solutions, namely single Y-shape, single triangle, double Y-shape and double triangle, can be realized. This can meet the various performance requirements of motors for different vehicle models and application scenarios, and at the same time solve the problem of frequent replacement of tooling fixtures when producing the above-mentioned different winding solutions for flat wire motors, thereby reducing production line investment and improving production efficiency.

[0052] In addition, the present invention also protects the motor stator including the above technical solution.

[0053] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A motor stator, comprising a stator body and a flat wire conductor, wherein the stator body is provided with spaced vertical through slots, each of which is provided with four layers of the flat wire conductor, characterized in that: It also includes a copper busbar, and the flat wire conductor includes a plug-in hairpin and a plug-in wire card. The plug-in hairpin is inserted into the through slot to form a three-phase winding, and each phase winding outputs four connectors, and the connectors are led out through the plug-in wire card. There are twelve plug-in wire cards, and the twelve plug-in wire cards are respectively plugged into the corresponding through slots. The copper busbar is connected to the plug-in wire cards to realize the corresponding connection method.

2. The motor stator according to claim 1, characterized in that: The number of the through slots is forty-eight, and the plug-in hairpins are six first hairpins, thirty-six second hairpins, twelve third hairpins and thirty-six fourth hairpins, wherein the plug-in hairpins include a connecting portion at the upper end, a straight line insertion portion on the left side, a straight line insertion portion on the right side and a welding portion at the lower end, and the line card includes an insertion end at the lower part and a wiring end at the upper part.

3. The motor stator according to claim 2, characterized in that: The welding part of the plug-in hairpin of the first layer in the same through slot or the bottom of the insertion end of the lower part of the line card is fixedly connected to the welding part of the plug-in hairpin of the second layer; the welding part of the plug-in hairpin of the fourth layer in the same through slot or the bottom of the insertion end of the lower part of the line card is fixedly connected to the welding part of the plug-in hairpin of the third layer.

4. The motor stator according to claim 4, characterized in that: The fixed connection is welding.

5. A motor, characterized in that :Including the motor stator described in claim 3.

6. The method for using the motor stator according to claim 3, characterized in that: There are four copper bars, the first copper bar is connected to the ninth, eleventh and twelfth joints; the second copper bar is connected to the second and fifth joints; the third copper bar is connected to the first and third joints; the fourth copper bar is connected to the fourth and sixth joints; the seventh, eighth and tenth joints are U, V and W three-phase outputs, forming a single Y-shaped connection.

7. The method for using the motor stator according to claim 4, characterized in that: There are six copper bars, the first copper bar is connected to the eighth and twelfth joints to output as V phase; the second copper bar is connected to the ninth and tenth joints to output as W phase; the third copper bar is connected to the seventh and eleventh joints to output as U phase; the fourth copper bar is connected to the first and third joints; the fifth copper bar is connected to the second and fifth joints; the sixth copper bar is connected to the fourth and sixth joints, forming a single triangle connection.

8. The method for using the motor stator according to claim 4, characterized in that: There are four copper bars, the first copper bar connects the fifth and eighth joints to output as V phase; the second copper bar connects the sixth and tenth joints to output as W phase; the third copper bar connects the third and seventh joints to output as U phase; the fourth copper bar connects the first, second, fourth, ninth, eleventh and twelfth joints to form a double Y-shaped connection.

9. The method for using the motor stator according to claim 4, characterized in that: There are four copper busbars, the first copper busbar connects the second, sixth, tenth and eleventh joints to output as V phase; the second copper busbar connects the first, fifth, eighth and ninth joints to output as W phase; the third copper busbar connects the third, fourth, seventh and twelfth joints to output as U phase, forming a double triangle connection.

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