This paper simulates and analyses the torque pulsation because of the modulation frequency and speed variation under ambipolar pulse width modulation, at the same time the results are given.

本文对双极性调制的无刷直流电动机仿真分析了转速和调制频率对转矩影响同时给出仿真结果。

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Then the principle of Pulse Width Modulation and Pulse Frequency Modulation is analyzed in detail.

之后阐述了脉冲宽度调制和脉冲频率调制的工作原理。

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