INVERTER DEVICE AND FAULT DIAGNOSIS METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an inverter device having a configuration that allows offline fault diagnosis to be simply executed.;SOLUTION: The inverter device includes: a converter part 1 for converting an AC current into a DC current; a DC capacitor 2 for smoothing output of the converter part 1; an inverter part 5 for converting DC voltages at both ends of the DC capacitor 2 into AC voltages so as to drive an AC motor 7; a control part 10 for supplying ON/OFF pulses to switching elements constituting the inverter part 5; and a short-circuit bar 4 provided in a DC wiring between the DC capacitor 3 and the inverter part 5. The short-circuit bar 4 is removed when a device is subjected to offline fault diagnosis, and a resistor 13 is inserted instead of the short-circuit bar.;COPYRIGHT: (C)2011,JPO&INPIT