Direct AC to AC power conversion apparatus for controlling power

Details Direct AC to AC power conversion apparatus for controlling power Direct AC to AC power conversion apparatus for controlling power

1998-09-17

2000-09-19

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

H02M 112

Patent

active

061221821

ABSTRACT:
An AC Power and Frequency Apparatus useful for supplying power to an AC receptive load. Said apparatus facilitates said power and frequency control without first converting the AC input to DC and then subsequently converting said DC signal to AC. The elimination of the DC conversion stage beneficially improves the performance of the apparatus in terms of lower Total Harmonic Distortion and higher Power Factor. Additionally, the reliability of the device is significantly enhanced by elimination of the DC storage capacitor common to prior art utilizing a DC conversion stage. The present invention is particularly useful in controlling power delivered to gas discharge lamps and the like. The device accomplishes the AC power control by switching at least one energy storage inductor with an electronically controlled switch. Switching the electronically controlled switch between the on and off states causes the inductor to reverse polarity and transfer the stored energy to the load through a resonant frequency and voltage increasing circuit.

REFERENCES:
patent: 4833588 (1989-05-01), Schauder
patent: 4896091 (1990-01-01), Kislovski
patent: 5005115 (1991-04-01), Schauder
patent: 5010471 (1991-04-01), Klaassens et al.

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