Optimization method of lowering electromagnetic loss in motor low-speed large torque zone

Abstract

The invention provides an optimization method of lowering electromagnetic loss in a motor low-speed large torque zone. According to the method, a calculation model of motor electromagnetic loss is built by considering a SVPWM control module under magnetic saturation effect, therefore, the optimization method of lowering electromagnetic loss in the motor low-speed large torque zone is obtained. Themethod provides theoretical basis for improvement of a motor torque peak, and realizes many effects not shown in the prior art.

Description

technical field [0001] The present application relates to the field of motor optimization design, in particular to an optimization method for reducing electromagnetic losses in the low-speed and high-torque region of the motor. Background technique [0002] The peak torque of the motor directly affects the acceleration capability of the motor and plays a vital role in the power performance of the motor. The generation of electromagnetic loss of the motor is closely related to the interaction of the electromagnetic field inside the motor, which is an important factor restricting the peak torque of the motor. The electromagnetic loss of the motor mainly includes winding copper loss, stator iron loss and rotor eddy current loss. Since the eddy current loss in the rotor iron loss is far greater than the hysteresis loss, the rotor iron loss and the permanent magnet eddy current loss are collectively called the rotor eddy current loss. [0003] At present, SVPWM control is widely...

AI Technical Summary

Problems solved by technology

Compared with traditional industrial frequency motors, the wide speed range of motors for vehicles makes the influence of motor control mode on iron loss intensified, which makes it necessary to calculate the electromagnetic loss under the control of motor SVPWM, and the magnetic saturation effect of the motor stator causes electromagnetic parameters Non-linear changes, especially in the low-speed and high-torque area, the magnetic saturation effect is more serious, which makes the current harmonics generated by the motor during the SVPWM control process change, which in turn affects the electromagnetic loss generated by the motor

At the same time, the electromagnetic loss in the low-speed and high-torque region of the motor is relatively high, which leads to the problem of temperature rise of the motor and limits the increase of the peak torque of the motor. At present, the optimization of electromagnetic loss is mainly for rated working conditions, and there is no solution for low-speed and high-torque motors. Research on the optimization of electromagnetic losses in the region has emerged

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