A new city lighting energy saver based on AC chopper technology for city lighting system was designed.
针对城市照明系统，设计了一种基于交流斩波技术的新型城市照明节电器。
The topology of dynamic voltage restorer is proposed for power quality improvement, which is composed of PWM AC chopper and power transformer.
为改善电能质量，提出了一种由PWM交流斩波变换器和变压器组成的动态电压恢复器电路拓扑。
The operation of 3 level AC chopper and 3 level matrix converters are introduced, the control method applied to 3 level matrix converter is presented.
文中详细分析了3电平交流斩波电路和3电平矩阵电路的工作原理，介绍了3电平矩阵电路所采用的控制方法。
The mode of speed control for mining tram includes three types of series resistances. Dc chopper and AC converter.
矿用电机车的速度控制方式包括串电阻式、直流斩波式和交流变频式三种。
The mode of speed control for mining tram includes three types of series resistances. Dc chopper and AC converter.
矿用电机车的速度控制方式包括串电阻式、直流斩波式和交流变频式三种。
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