H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/23
H02M 7/537 (2006.01) H02M 7/5387 (2006.01)
Patent
CA 1240734
14 ABSTRACT OF THE DISCLOSURE A multiple phase electronic inverter circuit includes a transistor bridge output circuit having a pair of series connected transistors in each output phase leg adapted to be connected between a pair of conductors for supplying direct current to opposite ends of the phase leg with a connection point between the transistors of each phase leg serving as an output power pole. A waveform pattern generator generates a transistor switching pattern which causes the transistors to alternate between two complementary operating modes such that one transistor in each phase leg functions in a commutation mode when and the other transistor in that phase leg functions in a non-commutation mode. By switching between the two operat- ing modes, saturation of controlled current feedback transformers in the base drive circuit of each transistor is prevented.
482806
Oldham And Company
Westinghouse Electric Corporation
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