Charge discharge structure and converter

The utility model discloses a charge discharge structure and a current converter, the charge discharge structure comprises a control circuit which is connected between a rectifier module and a bus capacitor and comprises a diode and a control switch which are connected in series, and when the diode is conducted, the rectifier module charges the bus capacitor; and the bleeder circuit is connected between the positive electrode and the negative electrode of the bus capacitor and comprises a controlled end for controlling the on-off of the bleeder circuit, the controlled end is connected with the diode, the bleeder circuit is switched off when the diode is switched on, and the bleeder circuit is switched on when the diode is switched off. According to the charge discharge structure provided by the utility model, through the connection relation among the control switch, the diode and the controlled end, the separation of the bus capacitor charging process and the bus capacitor charge discharge process is realized