一种实用的三相交流脉宽调压电路

A Practical Circuit of Three-phase AC Pulsewidth Adjustable Voltage

针对三相Y型接法对称性负载的三相交流脉宽调压电路的工作原理及电路仿真实验结果进行了详尽分析与研究,并以这种基本的交流调压电路拓扑为基础,对Y型接法对称性负载的电压进行脉宽调压控制,在电路结构中只采用了一只自关断型电力电子器件,使得电路结构简单、可靠.仿真结果表明,这种三相交流脉宽调压电路不仅可使负载上的电压谐波分量小、系统响应快,而且可适用于Y型接法的三相感应电动机调压调速、三相Y接电阻炉调温控制等多种负载的应用中.

The working principle and simulation result of three-phrase AC pulsewidth adjustable voltage circuit are analyzed and researched in detail,which aims at three-phase Y connection of symmetrical load. By this basic AC adjustable voltage circuit topology for foundation, the circuit uses a suitable power electronic components to realize the adjustable voltage control for the three-phase Y connection of symmetrical load, which makes circuit simple and reliable. The simulation result is given which shows that the AC pulsewidth adjustable voltage circuit can not only make voltage harmonic components few＇. but also can make the response of the system quick. It can be applied to voltage and speed adjustment with three-phase induction -motor,temperature adjusting control of electric stove with three-phase Y connection and so on.