Flat wire stator winding structure of motor

Abstract

The invention provides a flat wire stator winding structure of a motor. The structure comprises a stator iron core with multiple stator grooves, and each phase of winding that is formed by winding a flat wire on the stator iron core, wherein each phase of winding comprises at least one winding unit, and each winding unit comprises a first U-shaped coil and a second U-shaped coil. In part of or allthe second U-shaped coils, all the second U-shaped coils are sequentially and continuously arranged along the circumferential direction of the stator iron core, and one of the second U-shaped coil isplaced on the inner side of the corresponding first U-shaped coil to form a first sub-unit. The flat wire stator winding structure of the motor mainly solves the problem that in the prior art the most consumed coils with different spans are greatly different in ratio, under the primes of ensuring that the conductors in the grooves are invariably divided according to the phase spread, and can improve the problem that the space between the coils at the end part of the non-welding side is tight.

Description

technical field [0001] The invention relates to the field of motor structure, in particular to a flat wire stator winding structure of a motor. Background technique [0002] In the prior art, the stator windings of medium and low voltage motors are generally made of enamelled round copper wires wound into coils, and then rolled into the stator slots according to certain rules. The characteristics of the motors determine that the slot fullness rate of the motor is low and the end size is too large. This limits the improvement of motor efficiency and power density. With the development of flat wire insulation technology, the withstand voltage level of the flat wire itself has been continuously improved. The flat wire winding technology originally used for 48V automotive generators has gradually begun to be used in the drive motor field of new energy vehicles with a voltage level of several hundred volts. [0003] In order to improve the potential waveform, the motor is genera...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome at least one defect of the existing motor, and provide a flat wire stator winding structure of the motor, mainly to solve the most used problem in the prior art under the premise of ensuring that the conductors in the slot are divided by phase bands. The problem of disparity in the proportion of coils with different spans, and the problem of space tension between the end coils on the non-welding side can be improved

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