Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1986-03-19
1987-08-18
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
323222, 363 82, 363126, H02M 706
Patent
active
046881620
ABSTRACT:
A single phase, full wave diode bridge circuit is connected with a chopper on its DC output side. An output voltage of the chopper is smoothed by a smoothing capacitor and thereafter supplied for a load. A current control apparatus forms a current reference signal which is synchronized with an AC voltage applied to the bridge circuit and has a magnitude corresponding to a current flowing through the load and produces a deviation signal between the current reference signal and an actual AC input current of the bridge circuit. The chopper is controlled in accordance with the deviation signal so that the AC input current follows the current reference signal, whereby the power factor and the waveform of the AC input current in the bridge circuit are improved.
REFERENCES:
patent: 3906337 (1975-09-01), Depenbrock
patent: 3909698 (1975-09-01), Nill
patent: 4212277 (1983-10-01), Mitchell
patent: 4437146 (1984-03-01), Carpenter
patent: 4533986 (1985-08-01), Jones
Mutoh Nobuyoshi
Nandoh Kenji
Okajima Ikuo
Sakai Keijiro
Suzuki Toshio
Beha Jr. William H.
Hitachi , Ltd.
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