• 1. pwm variable speed: pwm调速
• 2. PWM variable-speed drives: PWM变频驱动装置
• 3. dual-PWM variable frequency speed regulation: 双PWM变频调速

• 1.This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
  对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
  dict.yoduao.com
• 2.This article briefly introduces the basic control principle of the three-potential PWM variable frequency speed regulation.
  文章简要叙述了三电平PWM变频调速方式的基本控制原理。
  dict.yoduao.com
• 3.The requirements for microprocessor control associated with a. c. variable speed control systems of PWM inverter are reviewed in this paper.
  本文回顾了PWM逆变器交流调速系统对微机控制的要求。
  dict.yoduao.com

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