Patent ID: 9154059
Filing Date: 2015-10-06
Classification: H02M,H02P

Abstract:
1. A multilevel inverter, comprising: a plurality of direct current input terminals disposed in order of descending potential from a first to an n first to n−1 n alternating current output terminals connected to one connection point of the pairs of first to n−1 a control unit that generates control signals for switching between a turning on and turning off of the first to (n−1)(3/2) a control signal interrupt circuit that, on an output interrupt signal for interrupting an output voltage of the alternating current output terminals being input, interrupts each of the control signals in sequence from that of a switching element directly connected to a direct current input terminal having the greatest difference in potential from that of an (n+1)/2 a monitoring unit that outputs a diagnostic signal for diagnosing a breakdown of the control signal interrupt circuit to the control signal interrupt circuit, and diagnoses a breakdown of the control signal interrupt circuit based on a response of the control signal interrupt circuit against the diagnostic signal.