Free running current supply for a monitor

Details Free running current supply for a monitor Free running current supply for a monitor

1986-09-08

1987-11-17

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

315411, 358190, 363 21, H04N 563

Patent

active

047077751

ABSTRACT:
In a free-oscillating converter for the current supply of a monitor, the switching frequency of an electronic switch is positioned midway between two consecutive multiples of the line frequency of the monitor, which obviates the necessity for a technically and financially expensive synchronization between switching frequency and line frequency. In the operating range of the converter, it is sufficient to adhere to the switching frequency with an accuracy of a few hundred Hz (f.sub.s .apprxeq.1.5+x).multidot.f.sub.z, where x.epsilon. .sub.o, f.sub.s =switching frequency and f.sub.z =line frequency.

REFERENCES:
patent: 3818128 (1974-06-01), Chambers et al.
patent: 4079418 (1978-03-01), Kupka et al.
patent: 4368409 (1983-01-01), Sivanesan et al.

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