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Multi Phase Controlled, Regulated, Constant Voltage, DC, Power Supplies

IP.com Disclosure Number: IPCOM000074437D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Kiankhooy-Fard, P: AUTHOR

Abstract

A number of phase-controlled, regulated, constant voltage DC power supplies can be combined so as to appear to the load as a large single power supply. Each of the power supplies is capable of delivering a predetermined current in accordance with a separate adjustment for each supply. The power supplies may have different component tolerances. Each of the power supplies A, B,...,N are shown having their outputs connected across load 10. The voltage across the load is sensed by common reference amplifier 12. Thus, the various power supplies A, B,...,N share the same reference amplifier 12. The output of reference amplifier 12 is connected to firing circuit 14 of each power supply via a separate potentiometer 16.

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Multi Phase Controlled, Regulated, Constant Voltage, DC, Power Supplies

A number of phase-controlled, regulated, constant voltage DC power supplies can be combined so as to appear to the load as a large single power supply. Each of the power supplies is capable of delivering a predetermined current in accordance with a separate adjustment for each supply. The power supplies may have different component tolerances. Each of the power supplies A, B,...,N are shown having their outputs connected across load 10. The voltage across the load is sensed by common reference amplifier 12. Thus, the various power supplies A, B,...,N share the same reference amplifier
12. The output of reference amplifier 12 is connected to firing circuit 14 of each power supply via a separate potentiometer 16. Each potentiometer is adjusted to compensate for the tolerance differences and the predetermined current from its respective supply. Potentiometers 16 do not have to be of the same value and the differences will provide an advance or delay of the firing angle from the nominal value. Therefore, by adjusting the potentiometer 16, the current for each supply can be preset and the component tolerances can be compensated for. If load 10 variations are appreciable, a tracking circuit can be incorporated to track these variations. A simple tracking circuit in the form of a variable resistor 18 is included in each of the input lines to firing circuits 14.

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