关键词: 过调制控制, 基波谐波注入, 电压基波幅值, 空间矢量脉宽调制, 空间矢量控制

Abstract:

Since the traditional SVPWM overmodulation model is a very complex with variable and unprecise control method, overmodulation control technology was introduced based on voltage amplitude of modulation wave by Fourier transform. With voltage amplitude of modulation fundamental wave controlling the output voltage amplitude, the control model was established by linear relationship between peek value of the modulating wave, peek value of the carrier wave and the output voltage amplitude. By means of a series of coordinate transform, the on/off times of inverter were calculated to control PWM waveform. With the clear control theory, simple model, small torque ripple, low noise,reliable conclusions, high voltage utilization, the method is validated by the theoretical analysis and the experimental result to meet with the requirements of the inverter motor overmodulation controlling.

Key words: overmodulation control, harmonic injection, fundamental voltage amplitude, SVPWM, space vector control