Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1998-02-10
1999-11-09
Nguyen, Matthew
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363126, H02M 542, H02M 706
Patent
active
059826495
ABSTRACT:
A power supply circuit is provided for generating a low voltage for powering a control circuit. The power supply circuit is connected to a voltage source having a high voltage relative to the output voltage of the power supply circuit. The power supply circuit includes a power supply capacitor and a charging capacitor connected to the power supply capacitor which charges the power supply capacitor when the power supply circuit is connected to the high voltage source. The power supply also includes an inductor connected to the power supply capacitor which charges the power supply capacitor by resonant action when the power supply circuit is disconnected from the voltage source, so that the power supply capacitor is continuously charged. A pair of diodes are also provided. The first diode is connected between the charging capacitor and the power supply capacitor. The second diode is connected in series with the inductor. The power supply circuit further includes a zener diode connected to the power supply capacitor for regulating the voltage across the power supply capacitor.
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patent: 5627708 (1997-05-01), Lee
patent: 5838181 (1998-11-01), Hesterman
Linear Technology Corporation, "Power Factor Controller: LT1248," Jun. 1993, pp. 1-12.
Unitrode Integrated Circuits, "Enhanced High Power Factor Preregulator: UC1854A/B, UC2854A/B, UC3854A/B," May 1993, pp. 5-226 to 5-228.
Unitrode Integrated Circuits, "High Power Factor Preregulator: UC1854, UC2854, UC3854," Feb. 1993, pp. 5-218 to 5-225.
Unitrode Integrated Circuits, "High Power-Factor Preregulator: UC1852, UC2852, UC3852," Dec. 1992, pp. 5-213 to 5-217.
Nguyen Matthew
Switched Reluctance Drives Limited
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