Insulation resistance deterioration detection method and...

Details Insulation resistance deterioration detection method and... Insulation resistance deterioration detection method and...

2007-08-07

2007-08-07

Benson, Walter (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

Reexamination Certificate

active

11332284

ABSTRACT:
The drive of the motor is stopped, the electromagnetic switch contacts are switched OFF, and thereafter the first and second contact points are closed to form a closed circuit of the smoothing capacitor, second contact point, first and second resistors, motor coil, ground1, ground2, first contact point, and smoothing capacitor. Charging voltage of the smoothing capacitor is applied to the closed circuit. If an insulation resistance of the motor deteriorates, a current flowing through the closed circuit is increased. The increase of the current is detected by means of the potential difference across the first resistor R1in the closed circuit, to detect insulation resistance deterioration of the motor.

REFERENCES:
patent: 4562390 (1985-12-01), Tobise
patent: 5155441 (1992-10-01), Zelm
patent: 5243243 (1993-09-01), Andrews
patent: 5430636 (1995-07-01), Kachi
patent: 6421618 (2002-07-01), Kliman et al.
patent: 6724313 (2004-04-01), Sato et al.
patent: 2005/0068000 (2005-03-01), Yamada et al.
patent: 1 491 907 (2004-12-01), None
patent: 2 025 170 (1980-01-01), None
patent: 2001-141795 (2001-05-01), None
patent: 2005-110400 (2005-04-01), None
European Search Report in corresponding Patent Application No. 06250232.3-2216 dated May 24, 2006.

Affiliated with

Also associated with

Rating

Insulation resistance deterioration detection method and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Insulation resistance deterioration detection method and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Insulation resistance deterioration detection method and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3839647