Patent ID: 9143079
Filing Date: 2015-09-22
Classification: H02M,H02P

Abstract:
1. A power converter comprising: an output circuit including a upper switching device connected to a direct-current power source and a lower switching device connected in series with the upper switching device, the output circuit configured to supply power to a load from a connection point between the switching devices; and a control circuit configured to supply pulse-modulated control signals to the switching devices to turn ON and OFF the switching devices; and a temperature sensor configured to detect a temperature of each switching device, wherein the control circuit variably sets a switching speed and a dead-time of the switching devices, the dead-time being defined as a time period where both of the switching devices are kept OFF, when the switching speed is set to a first speed, the dead-time is set to a first time length, when the switching speed is set to a second speed faster than the first speed, the dead-time is set to a second time length shorter than the first time length, when the temperature is lower than a predetermined threshold temperature, the switching speed is set to the first speed, and the dead-time is set to the first time length, and when the temperature is not lower than the threshold temperature, the switching speed is set to the second speed, and the dead-time is set to the second time length.