Pulse width regulated high voltage power supply using ringless flyback transformer
AssigneeComputron Display Systems Division of Xcel Corporation
InventorWilliam J. Sloot
Life of this patent
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Abstract
A flyback transformer operable over a broad frequency range is used as a regulated high voltage power supply. A ringless, layer-wound transformer is operated far below its natural resonant frequency in response to a pulse width modulator which may be synchronized with a video display in order to prevent beat frequency images in a video display. Diodes are coupled between the layers of windings to reduce the leakage inductance and stray capacitance. The supply is particularly suitable for TV or monitor use but not exclusively, so any apparatus requiring a regulated high voltage supply may use the invention.
Claims8
A high voltage, variable frequency power supply comprising a closely coupled layer-wound ringless flyback transformer, diode means isolating separate layers forming at least one winding of said transformer for reducing interwinding stray capacitance and leakage inductance, a bleeder resistance having one end connected to one end of said one winding, a power output terminal connected to said one end of said one winding, a capacitor connected between the other ends of said bleeder resistor and said one winding whereby said one winding and said bleeder circuit may be connected to different control circuits, and an A.C. feedback circuit connected through a capacitor to said one end of said one winding.
Dependencies are inferred from the claim text.