System and method for individual phase motor over voltage...

Details System and method for individual phase motor over voltage... System and method for individual phase motor over voltage...

2006-02-28

2006-02-28

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S020000, C361S033000

Reexamination Certificate

active

07006338

ABSTRACT:
A motor controller comprises a plurality of solid state switches each for connection between an AC line and a motor winding terminal for controlling application of AC power to the motor. A plurality of voltage sensors, each associated with one of the solid state switches, sense voltage for an associated motor winding. A control circuit controls operation of the solid state switches. The control circuit adjusts firing to one of the solid state switches if the sensed voltage for the associated winding varies from a threshold voltage by a select amount.

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PCT, International Search Report mailed Mar. 15, 2004.

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