Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1994-09-20
1996-03-26
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
315209R, 315307, 315224, H05B 3700
Patent
active
055026354
ABSTRACT:
A power line-operated electronic converter is adapted to deliver a relatively constant magnitude high frequency signal to a load(112) and is operable to draw a substantially sinusoidal current from the AC voltage source (101). The converter has DC input terminals (B+,B-) having a capacitor (105) connected therebetween. First and second rectifier bridges (103,104) are coupled to the DC input terminals. A resonant oscillator circuit (108) is coupled to the DC input terminals and to the transistor inverter employing a resonant inductor (111) and a resonant capacitor (110). An input-output feedback is implemented by coupling of a voltage developed across the resonant inductor to a differential voltage proportional to a difference of a voltage developed across DC input terminals and a voltage provided by a rectified AC voltage source, and modulation of frequency of oscillation in proportion to the differential voltage.
REFERENCES:
patent: 4723098 (1988-02-01), Grubbs
patent: 5049790 (1991-09-01), Herfurth et al.
patent: 5150013 (1992-09-01), Bobel
Bobel Andrzej A.
Krishnan Aditya
Wong Peter S.
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