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Method for assembling stator assembly of hairpin winding motor

An assembly method and motor technology, which are applied in the direction of embedding prefabricated windings in motors, electric components, and manufacturing motor generators, etc., can solve the problems of complicated procedures and complicated insertion and insertion processes, and achieve rapid assembly, improved NVH performance, and low cogging rotation. Effects of torque and torque fluctuations

Inactive Publication Date: 2019-04-16
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of inserting and fixing the separate hairpins to the stator core is also very complicated, because the slots of the stator core usually correspond to multi-layer hairpins, and there are many grooves in the circumferential direction, so the number of hairpins is large, so the insertion complicated process

Method used

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  • Method for assembling stator assembly of hairpin winding motor
  • Method for assembling stator assembly of hairpin winding motor
  • Method for assembling stator assembly of hairpin winding motor

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Embodiment Construction

[0030] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, but are not intended to exhaust all possible ways of the present invention, nor are they intended to limit the scope of the present invention. In particular, the stator assembly in the present invention is not only used for electric motors, but also for generators.

[0031] figure 1 A perspective view of a stator assembly according to an embodiment of the present invention is shown in which a hairpin has been inserted. The stator assembly 100 includes: a stator core 1 having a plurality of slanted slots 11 in the circumferential direction; and a plurality of hairpins 2 coupled to each slanted slot 11 and connected in a definite manner to form a coil winding. figure 1 It is a view from the head side of the hairpin 2 ...

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Abstract

The invention relates to a method for assembling a stator assembly of a hairpin winding motor. The method comprises the following steps: providing a stator core with inclined slots; providing a plurality of hairpins with square cross sections, twisting the leg parts of the hairpins according to the helical angles of the inclined grooves, and enabling the helical angles of the leg parts to be matched with the helical angles of the inclined grooves; grouping and fixing the free ends of the leg parts of the twisted hairpins, and enabling the twisted hairpins to form a squirrel cage assembly; integrally inserting the squirrel cage assembly into the stator core in a rotating mode; and electrically connecting the free ends in pairs to form a winding.

Description

technical field [0001] The invention relates to an assembly method of a stator assembly of a hairpin winding motor. Background technique [0002] Stators with straight slots are most commonly used in hairpin motors, such as hairpin permanent magnet synchronous motors (PMSM), because they are less expensive to design and manufacture. Although this structure is simpler than other designs, it will also lead to some urgent problems, such as cogging torque, torque fluctuation and radial force, which will lead to serious vehicle NVH (noise, vibration and acoustic vibration) problems. Roughness, Noise, Vibration and Harshness) issues. [0003] Therefore, in some prior art, a skewed slot design is used to significantly reduce radial force fluctuations and torque fluctuations (including cogging torque). A common design is to insert a winding with a circular cross section, such as a copper winding, in a chute. However, the circular cross-section of the winding will cause the intern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/04H02K15/06H02K15/02H02K1/16H02K3/04
CPCH02K15/0428H02K1/165H02K3/04H02K15/024H02K15/064
Inventor 夏小俊吴振华
Owner SCHAEFFLER TECH AG & CO KG