Stator lead structure and motor comprising same

Abstract

The application provides a lead-out structure of a stator, the stator comprising an insulating stator framework and a plurality of windings wound on the stator framework, wherein the lead-out structure of the stator comprises a neutral point lead-out wire arranged on the insulating stator framework and a wire harness lead-out assembly, the neutral point lead-out wire being connected to incoming wire ends of the plurality of windings, and the wire harness lead-out assembly being connected to outgoing wire ends of the plurality of windings. The application also provides an electric machine comprising the lead-out structure of the stator. By adopting a plurality of wire harness lead-out wires to shunt, the large current is shunted, thereby solving the problem that the existing low-voltage large-current electric machine cannot withstand large wire current at the wiring position, and the electrical safety is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric machines, in particular to a lead-out structure of a large-current electric machine. BACKGROUND

[0002] In the conventional electric machine manufacturing, the electric machine wiring mode is divided into star series and star parallel. For a special electric field combination, the output torque of the electric machine is required to be large and the operating voltage is required to be low. In order to optimize the efficiency of the electric machine, a star parallel double-strand parallel winding structure is preferably adopted. Meanwhile, in order to ensure the electrical safety, the insulation structure adopts an insulation support and a terminal seat crimping structure with better reliability. However, in the electric machine with such a structure, because the crimping terminal at the crimping structure has a low current resistance, the electric machine wiring place cannot bear a large line current, and there is a safety hazard when the line current is too large. SUMMARY

[0003] In view of the defects in the prior art, the purpose of the present application is to provide a new lead-out structure, which solves the problem that the low-voltage large-current electric machine wiring place cannot bear a large line current.

[0004] The present application provides a lead-out structure of a stator, the stator comprising an insulation stator framework and a plurality of windings wound on the stator framework, wherein the lead-out structure of the stator comprises a neutral point lead-out wire and a wire harness lead-out wire assembly arranged on the insulation stator framework, the neutral point lead-out wire is connected to the incoming wire end of the plurality of windings, and the wire harness lead-out wire assembly is connected to the outgoing wire end of the plurality of windings.

[0005] Optionally, the plurality of windings are windings arranged at intervals.

[0006] Optionally, the wire harness lead-out wire assembly comprises a first connecting terminal and a second connecting terminal, the first connecting terminal adopts a left and right outgoing wire structure, and the second connecting terminal adopts a single-sided outgoing wire structure.

[0007] Optionally, the wire harness lead-out wire assembly adopts a plurality of wire harness lead-out wires for shunt.

[0008] Optionally, the wire harness lead-out wire comprises a braided wire and a phase shunt insulation wire.

[0009] Optionally, the diameter of the phase shunt insulation wire is d, and the range of d is 0.9mm≤d≤1.05mm.

[0010] Optionally, the number of phase shunt insulation wires is n, the diameter of the braided wire is D, the diameter of the phase shunt insulation wire is d, and the relationship between D and d is 1≤D / (d*n)≤2.

[0011] Optionally, the stator is applied to a 9-slot parallel electric machine, and the electric machine has 9 windings.

[0012] The application also provides an electric machine provided with the lead-out wire structure of the stator.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] The application is provided with the neutral point lead-out wire and the wire harness lead-out wire assembly through the insulated stator framework, and a plurality of wire harness lead-out wires are used for the wire harness lead-out wire assembly, thereby shunting large current, and solving the problem that the low-voltage large-current electric machine cannot bear large wire current at the wiring position.

[0015] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments with reference to the drawings:

[0017] Figure 1 The figure is a lead-out wire installation structure of an embodiment of the application;

[0018] Figure 2 The figure is a wire harness lead-out wire structure of an embodiment of the application.

[0019] REFERENCE NUMERALS

[0020] 1 Neutral point lead-out wire

[0021] 2 Wire harness lead-out wire assembly

[0022] 3 Wire-out end of winding

[0023] 4 Wire-in end of winding

[0024] 5 First connecting terminal

[0025] 6 Second connecting terminal

[0026] 7 Braided wire

[0027] 8 Phase shunt insulated wire

[0028] 9 Pressing terminal DETAILED DESCRIPTION

[0029] The embodiments of the application will be described in detail below. Although the application will be described and explained with reference to some specific embodiments, it should be noted that the application is not limited to these embodiments only. On the contrary, any modification or equivalent replacement of the application should be covered in the scope of the claims of the application.

[0030] Also, for a better understanding of the present application, numerous specific details are given in the following detailed description. The skilled person will understand that the application can be practiced without these specific details. In some instances, well-known structures and components are not described in detail in order to emphasize the subject matter of the present application.

[0031] To solve the above technical problems, one embodiment of the present application provides a stator lead structure, comprising a stator lead structure, comprising an insulating stator framework and a plurality of windings wound on the stator framework. The stator lead structure comprises a neutral point lead 1 provided on the insulating stator framework and a wire harness lead assembly 2, the neutral point lead 1 connects the incoming end 4 of the plurality of windings, and the wire harness lead assembly 2 connects the outgoing end 3 of the plurality of windings.

[0032] Here, the 9-slot parallel motor lead connection structure is taken as an example for illustration. As shown in Figure 1 The lead structure comprises three neutral point leads 1 and one wire harness lead assembly 2. The neutral point lead 1 connects the incoming end 4 of the plurality of windings, and the plurality of windings are windings arranged at intervals. The wire harness lead assembly 2 connects the outgoing end 3 of every two windings (i.e. connects the stator windings of each phase motor).

[0033] The structure of the wire harness lead assembly 2 is shown in Figure 2 The single-phase lead needs to connect three windings, in order to save the use of connection terminals of the wire harness lead, the wire harness lead assembly 2 comprises a first connection terminal 5 and a second connection terminal 6, the first connection terminal 5 adopts a left and right outgoing line structure, and the second connection terminal 6 adopts a single-sided outgoing line structure. Here, a low-voltage high-current motor is taken as an example, the winding single-phase current of which is as high as about 11-13A during operation, and the line current is as high as 33-39A. If the motor structure in the prior art is adopted, the motor connection place is difficult to withstand such high current, and there is a great safety hazard. In this embodiment, two leads are used for shunt, which can effectively ensure electrical safety.

[0034] In an alternative embodiment, the wire harness lead assembly 2 adopts multiple wire harness leads for shunt, specifically, the number of wire harnesses can be selected as two or more as needed. In an alternative embodiment, the wire harness lead comprises a braided wire 7 and a phase shunt insulation wire 8. The number of braided wires 7 and the number of phase shunt insulation wires 8 can be selected as needed.

[0035] For this specific wire harness lead-out structure, in order to achieve better shunt effect, the number and size relationship of the braided wire 7 and the phase shunt insulation wire 8 are further optimized. Specifically, the number of phase shunt insulation wires 8 is n, the diameter of the braided wire 7 is D, the diameter of the phase shunt insulation wire 8 is d, and the relationship between D and d is 1≤D / (d*n)≤2. In this embodiment, by reasonably designing the number and size relationship of the braided wire 7 and the phase shunt insulation wire 8, and using a relatively thick braided wire 7, better shunt effect can be achieved by the braided wire 7 and the phase shunt insulation wire 8. Here is only one preferred design, in other alternative embodiments, the number and size relationship of the braided wire 7 and the phase shunt insulation wire 8 can also adopt other relationships, which all belong to the protection scope of the present application.

[0036] Further, the diameter of the phase shunt insulation wire 8 is d, and the range of d is 0.9mm≤d≤1.05mm. Here the numerical range of d is only one optional numerical range, in other alternative embodiments, the value of d can also be selected within other ranges, not limited to this, all belong to the protection scope of the present application.

[0037] In an embodiment, the stator is applied to a 9-slot parallel motor, and the motor has 9 windings. In this embodiment, the lead-out wire of the stator of the 9-slot parallel motor is taken as an example for description. It can be understood that the present application is not limited to this, in other alternative embodiments, the stator can also be applied to other types of motors, and the relevant parameters (such as the type, number and size relationship of the shunt wire harness, etc.) are adjusted and modified accordingly, which all belong to the protection scope of the present application.

[0038] In summary, compared with the prior art, the lead-out wire structure of the stator of the present application utilizes reasonable lead shunt of the wire harness lead-out wire, has the advantages of solving the problem that the low-voltage large-current motor wiring place cannot withstand large wire current, and ensures electrical safety.

[0039] The embodiment of the present application also provides an electric motor provided with the lead-out wire structure of the stator described above. The electric motor can be the 9-slot parallel motor described above, or other types of motors.

[0040] By adopting the lead-out wire structure of the stator of the present application, compared with the prior art, the electric motor utilizes reasonable lead shunt of the wire harness lead-out wire, has the advantages of solving the problem that the low-voltage large-current motor wiring place cannot withstand large wire current, and ensures electrical safety.

[0041] The above is further detailed description of the present application in combination with specific optional embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For ordinary skilled in the art to which the present application belongs, several simple deductions or replacements can be made without departing from the concept of the present application, and all of them shall be deemed as falling within the protection scope of the present application.

Claims

1. A lead-out structure of a stator, the stator including an insulating stator frame and a plurality of windings wound to be disposed on the stator frame, characterized by, The lead-out structure of the stator comprises a neutral point lead-out wire arranged on the insulating stator frame and a wire harness lead-out wire assembly, the neutral point lead-out wire is connected to the incoming wire end of the plurality of windings, and the wire harness lead-out wire assembly is connected to the outgoing wire end of the plurality of windings; The wire harness lead-out wire assembly comprises a first connecting terminal and a second connecting terminal, the first connecting terminal adopts a left and right outgoing wire structure, the second connecting terminal adopts a single-sided outgoing wire structure, the wire harness lead-out wire assembly adopts a plurality of wire harness lead-out wires for shunt, and the wire harness lead-out wire comprises a braided wire and a phase shunt insulated wire; The stator is applied to a 9-slot parallel motor, and the motor has 9 windings.

2. The lead-out structure of a stator according to claim 1, characterized by The plurality of windings are interval arranged windings.

3. The lead structure of a stator according to claim 1, characterized in that, The diameter of the phase shunt insulated wire is d, and d is in the range of 0.9mm≤d≤1.05mm.

4. The lead structure of a stator according to claim 1, characterized by The number of phase shunt insulated wires is n, the diameter of the braided wire is D, the diameter of the phase shunt insulated wire is d, and the relationship between D and d is 1≤D / (d*n)≤2.

5. An electric machine characterized by The motor is provided with the lead-out structure of the stator as claimed in any one of claims 1 to 4.

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