Regulated self-oscillating resonant converter with current feedb

Details Regulated self-oscillating resonant converter with current feedb Regulated self-oscillating resonant converter with current feedb

1998-12-28

2000-06-06

Nguyen, Matthew

Electric power conversion systems

Current conversion

Using semiconductor-type converter

315209R, H02M 75387, H05B 3702

Patent

active

060727101

ABSTRACT:
Lamp voltage or current obtained from a self-oscillating converter is stabilized by a feedback circuit. Gates of the switching transistors are connected to output windings of a current transformer whose input current winding is in series with the resonant load lamp circuit. The lamp voltage or current is sensed, and the resulting signal is used to control current through an auxiliary control winding on the current transformer. Preferably, two opposite conductivity type control transistors are connected in parallel across the control winding, and low-pass filtered DC signals corresponding to the lamp voltage or current bias the control transistors.

REFERENCES:
patent: 5382882 (1995-01-01), Nerone
patent: 5619106 (1997-04-01), Secen
patent: 5677601 (1997-10-01), Zuchtriegel
patent: 5757140 (1998-05-01), Nilssen
patent: 5757143 (1998-05-01), Matucci et al.
"A Mathematical Model of the Class D Converter for Compact Fluorescent Ballasts", by Louis R. Nerone, IEEE Transactions on Power Electronics, vol. 10, No. 6, Nov. 1995.

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