Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1998-04-21
1999-11-30
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 37, 363132, H02M 75387, H02M 324
Patent
active
059953985
ABSTRACT:
A power supply device for a discharge lamp has a rectifier for rectification of an AC voltage from an AC voltage source into an output DC voltage, a smoothing capacitor connected across the rectifier for providing a smoothed DC voltage, and an inverter which receives the smoothed DC voltage to provides a high frequency output to the lamp. The inverter includes a composite resonant circuit with first and second resonant systems each including an impedance element. The lamp is connected across the impedance element of the first resonant system. A balancing circuit is included to combine the high frequency powers fed respectively through the first and second resonant systems in a direction of canceling the high frequency powers with each other to provide a combined high frequency power. A feedback arrangement is included to superimpose the combined high frequency power upon the output DC voltage of the rectifier so as to feedback the resulting power to an input of the inverter for flowing a charge current for the smoothing capacitor. The first and second resonant systems are arranged to vary an amount of the combined high frequency power provided from the balancing means in response to a varying load condition of the lamp for reducing the canceling effect at the balancing means as the high frequency power supplied to the lamp increases.
REFERENCES:
patent: 3753071 (1973-08-01), Engel et al.
patent: 4677345 (1987-06-01), Nilssen
patent: 5644480 (1997-07-01), Sako et al.
Copy of an English Language Abstract of JP No. 4-193067.
Copy of an English Language Abstract of JP No. 5-38161.
Copy of an English Language Abstract of JP No. 7-288984.
Maehara Minoru
Murakami Yoshinobu
Yamamoto Minoru
Yamauchi Tokushi
Han Y. J.
Matsushita Electric Works Ltd
Wong Peter S.
LandOfFree
Power supply device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power supply device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1681544