Ripple reduction circuit for an inverter

Details Ripple reduction circuit for an inverter Ripple reduction circuit for an inverter

1983-11-22

1985-05-21

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 75, 363132, H02M 114

Patent

active

045190224

ABSTRACT:
A ripple reduction circuit for an inverter which converts DC power supplied on DC buses into AC power to drive a load includes a sensing transformer having a primary winding coupled to one of the buses by a switch so that the ripple on the DC bus is sensed. A periodic voltage is impressed across a secondary winding of the sensing transformer due to the sensed ripple and this periodic waveform is coupled to a secondary winding of an output inductor. A primary winding of the output inductor is connected between the output of the inverter and the load. The primary winding of the output inductor receives a first ripple component due to ripple on the DC bus and a second ripple component which opposes the first as a result of the periodic waveform in the secondary winding of the output inductor. The two ripple components substantially cancel one another and hence a low distortion power waveform is delivered to the load.

REFERENCES:
patent: 1965661 (1934-07-01), Loftis
patent: 2630557 (1953-03-01), Bixby
patent: 3340458 (1967-09-01), Keller
patent: 3510753 (1970-05-01), Lawn
patent: 3551780 (1970-12-01), Gautherin
patent: 3761797 (1973-09-01), Spooner
patent: 3777248 (1973-12-01), Vermolen
patent: 3825814 (1974-07-01), Pelly

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