Bus capacitor discharging circuit of vehicle motor controller

The invention relates to a capacitor discharging circuit, in particular to a bus capacitor discharging circuit of a vehicle motor controller, and solves the problems of complex signal transmission, influence to the discharge speed, generation of signal interference, increasing of the circuit load and the like caused by unreasonable control mode of a controllable release switch in an active discharging circuit adopted by a bus capacitor discharging circuit of an existing vehicle motor controller, and solves the problems of high power consumption and high failure risk caused by the mode of a combination of an active discharging circuit and a passive discharging circuit adopted by the bus capacitor discharging circuit of the existing vehicle motor controller. The bus capacitor discharging circuit of the vehicle motor controller is composed of at least one active discharging circuit connected with the two ends of a bus capacitor in parallel, wherein the active discharging circuit is formedby connecting an active