Power factor improving apparatus for power converter
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United States of America Patent
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-
Dec 15, 1981
Grant Date -
N/A
app pub date -
Jan 23, 1980
filing date -
Jan 24, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The two secondary windings of a transformer the primary winding of which is connected to an AC power supply are each provided with a controlled rectifying circuit. The DC sides of the rectifying circuits are connected in series to supply power to DC motors. One of the secondary windings is detachably connected with a capacitor bank. The capacity of the capacitor bank is selected so that the power factor of the converter can be improved to a satisfactory value when the two rectifying circuits are both controlled to produce output voltages. The capacitor bank becomes connected in response to the fact that the current in the primary winding of a transformer has arrived at a predetermined value.
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