Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1998-02-02
1999-04-27
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363131, H02M 324, H02M 7537
Patent
active
058985832
ABSTRACT:
A gate drive latching circuit for an auxiliary resonant commutation circuit for a power switching inverter includes a current monitor circuit providing a current signal to a pair of analog comparators to implement latching of one of a pair of auxiliary switching devices which are used to provide commutation current for commutating switching inverters in the circuit. Each of the pair of comparators feeds a latching circuit which responds to an active one of the comparators for latching the associated gate drive circuit for one of the pair of auxiliary commutating switches. An initial firing signal is applied to each of the commutating switches to gate each into conduction and the resulting current is monitored to determine current direction and therefore the one of the switches which is carrying current. The comparator provides a latching signal to the one of the auxiliary power switches which is actually conducting current and latches that particular power switch into an on state for the duration of current through the device. The latching circuit is so designed that the only time one of the auxiliary switching devices can be latched on is during the duration of an initial firing command signal.
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"Robust, High-Efficiency Controller For The Auxiliary Resonant Commutation Pole Power Converter," EC Delgado, MH Kheraluwala; Serial No. 08/622,504 (GE docket RD-24,837), filed Mar. 25, 1996.
Delgado Eladio Clemente
Kheraluwala Mustansir Hussainy
Breedlove Jill M.
General Electric Company
Stoner Douglas E.
Vu Bao Q.
Wong Peter S.
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