Patent ID: 9197137
Filing Date: 2015-11-24
Classification: H02M

Abstract:
1. An electric power conversion device, comprising: a conversion circuit having plural pairs of bi-directionally switchable switching elements connected to respective phases, the conversion circuit being configured to convert an inputted alternating current electric power into an alternating current electric power; voltage detecting means for detecting input voltages to the conversion circuit; and control means for switching on and off the switching elements to control the conversion circuit, wherein the control means comprises: a switching time calculating section configured a control signal generating section configured to generate control signals to switch on and off the switching elements using the first switching time and the second switching time, and wherein the second switching time is such that, in one period of the alternating current electric power outputted from the conversion circuit, the second switching time included in a first half period of the one period is equal to the second switching time included in a second half period of the one period.