介绍了一种由抽头式变压器、双向晶闸管和微机系统构成的高稳定通用交流稳压电源，给出了主电路形式及控制电路硬件、软件框图。这种稳压电源有效地解决了双向晶闸管的换向环流问题，可以在电网电压波动和负载轻重变化时实现稳压，其稳压精度为±１％ A kind of high stability universal AC regulated power supply which is composed of tapped transformer, bidirectional thyristor and microcomputer system is introduced. The hardware and software block diagram of the main circuit and the control circuit are given. This regulated power supply effectively solves the bidirectional thyristor commutation circulation problem, can be achieved when the grid voltage fluctuations and load changes in severity, the regulator accuracy of ± 1%