POWER CONVERSION DEVICE

摘要

[Abstract] 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. 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 form of a time which is a subtraction of the first switching time from a half period of a carrier and, using this time, control signals to switch on and off of the switching elements are generated.