| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection device of insulation degradation for an inverter device, capable of reducing error factors caused in inverter control and detecting a slight current leakage in an inverter load circuit, with accuracy during detecting insulation degradation in the inverter load circuit. SOLUTION: In detecting the insulation degradation for the inverter load circuit, a zero-phase current transformer 6, a low-pass filter 7, and an amplifier 8 are constituted in series. A zero-phase current transformer accommodating part 9 integrally constituted with the zero-phase current transformer, the low-pass filter, and the amplifier is placed on a load side of an inverter control device 3. The output from the accommodating part 9 is inputted in an insulation degradation detecting unit 11, thus reducing the influence of electromagnetic induction and the influence of the current leakage of the filter and the inverter control circuit itself. COPYRIGHT: (C)2006,JPO&NCIPI
|
