This paper introduces a simple, reliable AC power supply with constant voltage and frequency. The supply consists of a DC motor-AC generator set, a automatic voltage regulator (AYR), and a automatic frequency regulator (AFR).

• 本文介绍一种简单可靠的恒压恒频交流电源装置；它由直流电动机-交流发电机组、自动电压调节器AVR及自动频率调节器AFR组成.