Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1998-11-17
2000-02-08
Riley, Shawn
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 71, 336212, H02M 7537, H02M 700, H01F 2724
Patent
active
060234202
ABSTRACT:
A three-phase inverter for small, high speed motors such as a miniature centrifical compressor which has a low voltage, high current requirement. The inverter is supplied with DC power at 28 volts, and produces power of about 50 to 500 watts at about 15 volts, and at frequencies of about 5 to 9 kilohertz. Six D-type flip-flops with clock inputs produce twelve signals which are provided to six bridge drivers. Each bridge driver controls two MOSFET's in series. The MOSFET's are supplied with DC power. Outputs are fed to primaries of adjacent transformers in a circular array. The transformer secondaries are arranged in a star configuration to produce stepped voltage and saw-tooth current output wave forms approximating sinusoids in three phases.
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McCormick John A.
Valenzuela Javier A.
Creare Inc.
Patel Rajnikant B.
Riley Shawn
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