According to torque ripple of brushless DC motor, the different PWM modulation mode and overlapping commutation method are used to minimize torque pulsation when current commutation is considered.

针对无刷直流电动机的转矩脉动，提出采用不同的PWM调制方式以及不同的重叠换相角减小换相电流所引起的转矩脉动。

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The controller provides all the advantages from PWM modulation, fuzzy logical control and sliding mode variable structural control, and solves the chattering problem better.

该控制器具备pwm调制、模糊逻辑控制和滑模变结构控制三者的优点，较好地解决了滑动模态的抖动问题。

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This paper presents the principle and virtues of a current-mode-control pulse width modulation(PWM), and makes a comparison with traditional voltage-mode-control.

本文介绍了开关电源的电流型PWM控制技术的原理及特点，并和传统的电压型控制作了比较。

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