Online fault diagnosis device for rotating rectifier of brushless excitation system

The utility model relates to an on-line fault diagnosis device for a rotating rectifier of a brushless excitation system, and the device carries out the collection and signal conditioning of the excitation current of an exciter in the brushless excitation system through a current collection circuit, and then enables the excitation current to enter a digital signal processing circuit for fault analysis. Finally, excitation current parameters, whether the rotating rectifier breaks down or not and fault types are obtained at the signal processing circuit, corresponding fault switching signals are output in real time through the fault action circuit, and fault processing is carried out in time in cooperation with other devices in the system. Meanwhile, a CAN communication circuit is further arranged, and finally obtained exciting current parameters and fault diagnosis results can be sent to a display control panel and a remote user terminal. On-line fault diagnosis of the rotating rectifier in the brushless excit