Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Alexander S. Filippenko1
Date of Patent
April 21, 2009
1Patent Application Number
115903351
Date Filed
October 30, 2006
1Patent Primary Examiner
Patent abstract
A controller for an automatic transfer switch mechanism in an electrical distribution panel, which automatically determines motor phase by monitoring the back EMF voltage of the motor when no power is applied to the motor as defined by a pulse width modulation circuit. Phase comparisons of the voltage on the line and load sides of the transfer switch mechanism determine the position of the transfer switch mechanism.
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