Patent ID: 7388353
Filing Date: 2008-06-17
Classification: H02M

Abstract:
1. A discharging system for a smoothing capacitor, comprising: a first switching circuit adapted to conduct conversion between an AC current and a DC current; a first load connected to an AC side of the first switching circuit; a second switching circuit adapted to conduct the conversion between the AC current and the DC current; a second load connected to an AC side of the second switching circuit; a smoothing capacitor connected to DC sides of the first and second switching circuits; a voltage detecting unit configured to detect a voltage of the smoothing capacitor; and a control means for controlling discharging of the smoothing capacitor, wherein the control means is adapted to drive at least one of the first and second switching circuits to discharge the smoothing capacitor by at least one of the first and second loads when the voltage of the smoothing capacitor detected by the voltage detecting unit is reduced to a predetermined value or less.