Title:
LEAKAGE DETECTOR OF VEHICLE-MOUNTED POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/007749
Kind Code:
A1
Abstract:
A leakage detector which can detect leakage correctly in both the DC high voltage
circuit and the AC high voltage circuit of a vehicle-mounted power supply system.
Under a state where a contactor (17) is turned off, all IGBT elements (switching
elements) (76) of an IGBT inverter circuit (12) are turned on and an AC signal VS
is applied to an application point P. Leakage is detected by comparing the measured
voltage at a voltage measuring point Q with a threshold.
Inventors:
ENDOU TAKAYOSHI (JP)
Application Number:
PCT/JP2006/313763
Publication Date:
January 18, 2007
Filing Date:
July 11, 2006
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
ENDOU TAKAYOSHI (JP)
ENDOU TAKAYOSHI (JP)
International Classes:
H02H3/16; H02M7/48
Foreign References:
| JP2003223841A | 2003-08-08 | |||
| JPH0870503A | 1996-03-12 | |||
| JP2002209331A | 2002-07-26 |
Other References:
See also references of EP 1903651A4
Attorney, Agent or Firm:
KIMURA, Takahisa et al. (8-11 Minato 1-chom, Chuo-ku Tokyo 43, JP)
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