Stator module and driving motor

Abstract

The embodiment of the invention provides a stator module and a driving motor. The stator module comprises a stator core and M-phase stator windings. The inner periphery of the stator core is providedwith a plurality of axially arranged slots, the M-phase stator windings are formed by employing flat wires, the M-phase stator windings are wound into L layers in the slots, M is a positive integer, Lis an even number which is greater than or equal to 6, each phase of stator windings in the M-phase stator windings comprises at least two sets of sub-windings which are connected in parallel, and each set of sub-windings comprises a plurality of coils which are connected in series; a plurality of coils of at least one set of sub-windings of each phase of stator winding are distributed in L different layers of the slots. According to the embodiment of the invention, it is ensured that the back electromotive force, the resistance and the inductance of each parallel sub-winding are approximately the same to greatly reduce the unbalance rates of the resistance, the inductance and the current of each parallel branch of each phase of stator windings, thereby reducing the additional copper consumption caused by circulation.

Description

technical field [0001] The invention relates to the field of motors, and more specifically, to a stator assembly and a driving motor. Background technique [0002] Environmental pollution and energy crisis have promoted the vigorous development of the new energy vehicle industry, especially the electric vehicle industry. As one of the key executive components of electric vehicles, vehicle drive motors are crucial to the performance of the vehicle. At present, automotive motors are developing in the direction of high speed, light weight, and high efficiency, and there are higher requirements for the power density, efficiency level, and heat dissipation capacity of the motor. [0003] Compared with conventional loose wire windings, flat wire windings have higher slot fill ratio, higher power density and better heat dissipation capability, so they are gradually being used in the field of vehicle drive motors. Compared with loose wire winding motors, flat wire winding motors h...

AI Technical Summary

Problems solved by technology

[0009] The embodiments of the present invention aim at the above-mentioned large differences in the back EMF, resistance and inductance of the parallel branches, which cause a large circulating current between the parallel branches, increase additional losses, reduce the efficiency of high-speed operation, and cause local overheating of the windings at the same time, reducing Motor life, deterioration of the NVH performance of the motor, and problems such as increasing the cost of the inverter, providing a stator assembly and a drive motor

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