Patent ID: 11984818

Abstract:
In an inverter, three switching circuits each include first to fourth switching elements, first and second diodes, and a control circuit controlling potentials of gates. The control circuit causes potentials of U-, V-, and W-phase output wirings to change among high, neutral point, and low potentials. The control circuit performs an emergency operation when any of the second and third switching elements and the first and second diodes has caused a short fault. In the emergency operation, a potential of a limit output wiring is caused to change between two potentials that are not inhibiting potentials, and potentials of normal output wirings are caused to change among three potentials. When the short-fault element is the second switching element or the second diode, an inhibiting potential is the low potential. When the short-fault element is the third switching element or the first diode, the inhibiting potential is the high potential.