Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1993-06-23
1995-07-25
Skudy, R.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 98, 363 56, 307 51, 307 58, 307 82, H02M 75387
Patent
active
054368235
ABSTRACT:
A parallel operation controller for power converters which performs parallel operation control of a plurality of power converters having input terminals connected to a DC voltage source and output terminals connected to each other through reactors. The parallel operation controller includes: three-arm modulation control signal generating devices for generating three-arm modulation control signals each serving as a voltage command value for each phase of corresponding power converters; a voltage fixing period determining circuit which selects, on the basis of a three-arm modulation control signal from one of the three-arm modulation control signal generating devices, a phase fixing the voltage level thereof to a predetermined DC voltage level, and determines a period in which the voltage level is fixed. This parallel operation controller reduces the amount of circulating currents which flow between phases of unit inverters.
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Mitsubishi Denki & Kabushiki Kaisha
Riley Shawn
Skudy R.
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