Magnetic saturation detection method for power converters and common mode reactors

摘要

Provided is a power conversion device capable of appropriately detecting the saturation state of a common mode reactor. The power converter (100) is a semiconductor to which a semiconductor power converter (1) for converting DC power into AC power to a motor (102) and first and second auxiliary windings (24a, 24b) are added. A common mode reactor (2) that suppresses the common mode current that can flow between the power converter (1) and the motor (102), and a signal generator (3) that superimposes an alternating current on the first auxiliary winding (24a). ), And the saturation of the common mode reactor (2) based on the superimposed current superimposed on the first auxiliary winding (24a) and the winding voltage generated on the second auxiliary winding (24b) by the superimposed current. A detection circuit (4) for detecting a state is provided.