Excitation carbon brush on-line replacement training device

The utility model belongs to the technical field of motor maintenance, and discloses an excitation carbon brush on-line replacement training device, which comprises a collecting ring simulation unit, an on-line monitoring unit and a PLC (Programmable Logic Controller), the collecting ring simulation unit comprises a simulation collecting ring, a brush holder, carbon brushes, supporting seats and a motor, the multiple carbon brushes are detachably arranged on the brush holder in the circumferential direction, the two ends of the simulation collecting ring penetrate through the two brush holders to be rotationally connected with the two supporting seats, and the motor is connected to one end of the brush holder; the online monitoring unit comprises a camera and a display screen, the camera can collect operation video images of carbon brush replacement of students, and the display screen is connected with the camera; and the PLC is connected with the motor. The training device can simulate an operation environme