Brushless exciter is a very important part of brushless synchronous generator, and it is a very important factor to determined the quality of generator.

In the rotating-diode phase compound excitation Brushless synchronous machine, if one diode appears fault, such as opening or shorting during the normal operating, it will do harm to the generator.

AC brushless synchronous excitation generator is a rotating-armature synchronous generator, which has a module of three-phase rectification bridge.