In AVR(Automatic Voltage Regulator)open-loop mode,the common automatic current sharing control of parallel switching power supply system may change the static excitation current greatly. It can only be used safely in AVR close-loop mode.

• 开关电源并联系统常用的自动均流控制方法在自动电压调节器AVR(Automatic Voltage Regulator)开环模式下会大幅改变励磁电流静态值,故只能安全用于AVR闭环模式下。