| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an insulation deterioration detection device of a motor that can be inexpensively manufactured with a simple constitution and detect even a low progression degree of insulation deterioration without taking labor and time for the detection. <P>SOLUTION: The insulation deterioration detection device includes: a grounding switch 16 for connecting a negative side bus-line 12 of a DC power source 5 including a capacitor 6 to an earth G1; grounding switch control means 17 for turning on the switch 16 when a power source switch 1 is switched from an on-state to an off-state; a voltage detector 18 for detecting output voltage of the DC power source 5; a current detector 19 in a circuit portion from an output end of a positive side bus-line 11 of the DC power source 5 up to an input end of a motor 7; and insulation resistance detection means 20 for detecting insulation resistance Rx of an insulation part 7b in relation to an earth G2 of the motor 7 from detection values of the voltage detector 18 and the current detector 19. <P>COPYRIGHT: (C)2012,JPO&INPIT |
