Unity power factor power supply which includes an electromagneti

Details Unity power factor power supply which includes an electromagneti Unity power factor power supply which includes an electromagneti

1993-12-27

1995-10-17

Dougherty, Thomas M.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

363 45, G05F 110

Patent

active

054593921

ABSTRACT:
An electromagnetic interference reduction circuit incorporated into a pulse width modulator in a power factor corrector circuit, and which serves continuously to vary the operating frequency of the width modulated output of the pulse width modulator so that the fundamental component of said output is spread over a relatively wide bandwidth. The frequency of the width modulated output varies continuously in direct proportion to the voltage from a rectified alternating current sine wave voltage source in order to spread the electromagnetic interference in the circuit over a wide bandwidth.

REFERENCES:
patent: 4536700 (1985-08-01), Bello et al.
patent: 4677366 (1987-06-01), Wilkinson et al.
patent: 4855665 (1989-08-01), Mandelcorn
patent: 4885675 (1989-12-01), Henze et al.
patent: 5115185 (1992-05-01), Fraidlin et al.
patent: 5345375 (1994-09-01), Mohan

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