一种高效的输出电压可升可降的交流调压电路  

An Efficient AC Voltage Regulator with Voltage Step-up and Step-down Capability

作　　者：王归新[1] 赵平[1] 李凤霞[1] 

机构地区：[1]三峡大学,湖北宜昌443002

出　　处：《电测与仪表》2009年第4期72-74,共3页Electrical Measurement & Instrumentation

摘　　要：本文介绍一种用双向交流BUCK斩波器和串联变压器构成的串联调整式交流调压电路。鉴于双向交流BUCK斩波器效率不高且只能降压不能升压,采用串联调整式结构大幅提高系统效率,采用继电器切换双向交流BUCK斩波器施加在串联变压器上的电压使系统输出电压可升可降。实验结果表明:系统效率高达99%,输出电压调节范围0.7～1.3p.u.,可广泛应用于交流稳压调压器、UPS、电力节电器等场合。A series regulated AC voltage regulator consisting of a bi-directional BUCK type AC chopper and a series transformer is introduced. As the efficiency of a bi-directional BUCK type AC chopper is not high and its output voltage can only step down, the series regulation structure is adopted to improve the system efficiency and a transfer relay array is used to change the voltage polarity applied to the series transformer, therefore both a step-down and a step-up output voltage are obtained. Experimental results show that the efficiency, the voltage regulating range of the proposed AC regulator are as high as 99% and from 0.7 to 1.3 P.U., respectively. It can be applied to an AC voltage stabilizer, a UPS, a power reducer and so on.

关 键 词：交流Buck斩波器 串联调整 PWM 

分 类 号：TM76[电气工程—电力系统及自动化]