Patent ID: 9360515
Filing Date: 2016-06-07
CPC Classification: G01R,H01L,H02M,H02P

Claim Text:
1. A fault detection device for an inverter system, that detects a fault in the inverter system, the inverter system including: an inverter circuit which converts input DC power into AC power; a motor which is driven by the inverter circuit; a current measuring unit that measures current flowing in the inverter circuit; a test voltage applying unit which applies a predetermined first test voltage to the current measuring unit when a driving start signal of the inverter circuit is input, whether the current measuring unit has failed being determined based on the applied predetermined first test voltage; and a control unit which applies a predetermined second test voltage to the inverter circuit and the motor, whether the inverter circuit and a coil of the motor have failed being determined based on the applied second test voltage; wherein a driving start control of the inverter circuit is stopped upon determining failure of the current measuring unit based on the first test voltage; wherein the driving start control of the inverter circuit is stopped upon determining the inverter circuit and the coil of the motor have failed based on the second test voltage after determining the current measuring unit is normal; and wherein driving of the inverter circuit is started upon determining the inverter circuit and the coil of the motor are normal.