POWER CONVERSION DEVICE

摘要

An electric power conversion device comprises a conversion circuit having bi-directionally switchable plural pairs of switching elements connected to respective phases and converting an inputted AC power into an AC electric power. A first switching time is calculated during which one of the switching elements of an upper arm circuit of the plural pairs of switching elements included in one phase from among the respective phases is turned on, the other switching elements of the upper arm circuit of the plural pairs of switching elements included in the other phases are turned off, at least one switching element of a lower arm circuit of the plural pairs of switching elements included in the other phases is turned on, and the other switching elements of the lower arm circuit of the plural pairs of switching elements included in the one phase are turned off using detected voltages detected by voltage detecting means and an output command value. A second switching time is calculated during which the plural pairs of switching elements included in the one phase from among the respective phases are turned on and the plural pairs of switching elements included in the other phases from among the respective phases are turned off. In a case where a state is transited from the first switching time to the second switching time, from among the switching elements each of which is in an on state, one of the switching elements of either one of the upper arm circuit or the lower arm circuit is turned off and the other of the switching elements of the other arm circuit is maintained in the on state.