Electric motor monitoring circuit

Details Electric motor monitoring circuit Electric motor monitoring circuit

1996-09-20

1998-05-12

Masih, Karen

Electricity: motive power systems

Induction motor systems

Primary circuit control

318490, 318799, 318815, 324107, 361 76, 361 92, 361 42, H02P 528

Patent

active

057511322

ABSTRACT:
An electric motor monitoring circuit apparatus for an electric motor has a three phase electric motor having an electric motor starter circuit. An insulation monitoring circuit is coupled to the electric motor and monitors insulation leakage of the electric motor and inhibits activation of the electric motor starter circuit when an insulation leakage exceeds a preselected threshold. A three phase monitor circuit is coupled to the electric motor for monitoring phase sequence in voltage amplitude for the electric motor.

REFERENCES:
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patent: 4333119 (1982-06-01), Schoenmeyr
patent: 4507713 (1985-03-01), Hsieh
patent: 4540922 (1985-09-01), Horvath et al.
patent: 4716487 (1987-12-01), Horvath et al.
patent: 4823227 (1989-04-01), Grant
patent: 4825328 (1989-04-01), Izaguirre, Sr.
patent: 5224010 (1993-06-01), Tran et al.
patent: 5239439 (1993-08-01), Lee
patent: 5315256 (1994-05-01), Schuyler

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