Patent ID: 9667169
Date: 2017-05-30
CPC Classifications: B60L,H02M,H02P,Y02T

Claim:
1. A power conversion apparatus, comprising: a power conversion element that converts direct-current power supplied from a direct-current power supply into alternating-current power and supplies the alternating-current power to a load; a capacitor that smoothes the direct-current power; a control circuit that outputs a control signal to control operation of the power conversion element at the time of driving the load; a discharge control unit that outputs a discharge control signal to control operation of the power conversion element at the time of discharging the capacitor, and outputs a discharge switching signal to pass or intercept the control signal according to an output state of the discharge control signal; a power supply circuit that generates a power supply voltage to operate the discharge control unit, on the basis of a voltage between both ends of the capacitor; a switching circuit that receives the control signal from the control circuit, receives the discharge control signal and the discharge switching signal from the discharge control unit, and outputs the control signal or the discharge control signal based on the discharge switching signal, and a driver unit that outputs a driving signal to operate the power conversion element, on the basis of the control signal or the discharge control signal output from the switching circuit, wherein the power conversion element is operated according to the discharge control signal, a current is flown from the capacitor to the load through the power conversion element, and the capacitor is discharged.