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Patent Searching and Data


Title:
【発明の名称】モータチェッカ
Document Type and Number:
Japanese Patent JP2924600
Kind Code:
B2
Abstract:
PURPOSE:To monitor the reduction in insulation resistance at all times and further automatically discriminate whether the resistance of insulation resistance is normal or not even while a motor is operating by mounting a clamp sensor to a motor cable paying attention to the fact that the difference between flow-in and flow-out current is leakage current. CONSTITUTION:Leakage current is detected while a motor is operating by a clamp sensor 1 and a microcomputer 3 compares a detection value I detected by the clamp sensor 1 with a reference value I0 which is set by a reference value setting control 2 and is stored by a microcomputer 3 and judges if it is normal or not based on the comparison result and then a speaker 5 or a flashing lamp 7 outputs a warning signal externally when the judgment result is judged to be abnormal.

Inventors:
HASE MORIMASA
Application Number:
JP24398293A
Publication Date:
July 26, 1999
Filing Date:
September 03, 1993
Export Citation:
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Assignee:
DENSOO KK
International Classes:
G01R27/18; G01R31/34; H02H7/08; H02K11/04; H02K13/00; H02P7/06; (IPC1-7): H02K13/00; G01R27/18; G01R31/34; H02H7/08; H02K11/00
Domestic Patent References:
JP57138844A
JP59125081A
JP3233340A
JP348363U
Attorney, Agent or Firm:
Yoji Ito