System and method for confirming a detection of low voltage...

Details System and method for confirming a detection of low voltage... System and method for confirming a detection of low voltage...

2008-05-27

2008-05-27

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

C318S782000, C318S786000

Reexamination Certificate

active

11208146

ABSTRACT:
A motor controller system includes solid state switches for connection between an AC line and motor terminals for controlling application of AC power to a motor. Voltage sensors sense voltage across each of the solid state switches and AC line voltage. A control circuit controls operation of the solid state switches. The control circuit compares the sensed voltages across each of the solid state switches with the AC line voltage in a non-run mode to determine if there is a shorted solid state switch.

REFERENCES:
patent: 6201369 (2001-03-01), Johnson
patent: 6586905 (2003-07-01), Johnson
patent: 2548814 (1996-08-01), None
patent: 11-150676 (1999-06-01), None
patent: 2003-255442 (2003-09-01), None

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