Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1988-03-30
1989-09-12
Salce, Patrick R.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 37, 363132, H02M 542
Patent
active
048665924
ABSTRACT:
A control system for a transistor inverter comprising a circuit for detecting the load current or the output voltage from the inverter to produce a detection output; a circuit for outputting a control instruction for adjusting the load current; a leading angle forming circuit for combining the detection output with the control instruction to form a control signal corresponding to a leading angle at which the inverter output voltage is controlled with a leading phase relative to the load current; and a circuit receiving the control signal from the leading angle forming circuit and for forming a switching control signal, which is supplied to the switching devices in the inverter. The load current is not controlled directly by controlling the frequency of the inverter, but by changing the phase difference .gamma. between the load current and the inverter output voltage.
REFERENCES:
patent: 4270164 (1981-05-01), Wyman et al.
patent: 4471196 (1984-09-01), Frank et al.
Fujii Masaaki
Nomura Toshihiro
Fuji Electric & Co., Ltd.
Peckman Kristine
Salce Patrick R.
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