Switching regulator having a constant current through its induct

Details Switching regulator having a constant current through its induct Switching regulator having a constant current through its induct

1989-11-09

1991-01-22

Beha, Jr., William H.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323288, H02M 3156

Patent

active

049873610

ABSTRACT:
A switching regulator which substantially suppresses effects on the output voltage of noise in a direct input voltage includes a direct voltage source for producing an input voltage, and output, and a controllable electronic switch connected between the voltage source and the output, an inductance connected between the voltage source and the switch, a pulse with modulator for controlling the switch, a first saw tooth signal producing device for supplying to the pulse width modulator a saw tooth signal, and a device for producing a current proportional voltage which is proportional to current through the inductance. This current proportional voltage is supplied to the pulse width modulator. In order to substantially suppress the effects of noise on the output voltage, a second saw tooth signal is supplied to the pulse width modulator which has an amplitude proportional to a negative value of the input voltage, and supplying a further signal to the pulse width modulator which has an amplitude which is a function inversely proportional to the value of the input voltage for maintaining the arithmetic mean of the current through the inductance constant.

REFERENCES:
patent: 4674020 (1987-06-01), Hill
patent: 4717994 (1988-01-01), Diaz et al.
patent: 4816982 (1989-03-01), Severinsky
patent: 4837495 (1989-06-01), Zansky
patent: 4885674 (1989-12-01), Varga et al.
Redl et al., "Switching Mode Power Converters . . . ", Powercon 7, pp. 1-16, Mar. 25-27, 1980.

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