Browse Prior Art Database

Parallel Identical Direct Mode DC-DC Converters

IP.com Disclosure Number: IPCOM000049720D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Azzis, D: AUTHOR [+2]

Abstract

This article describes a method of placing several converters el in parallel to get extra current, in which all of the converters are identical and each converter is provided with voltage- and current-limitation mechanisms.

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Parallel Identical Direct Mode DC-DC Converters

This article describes a method of placing several converters el in parallel to get extra current, in which all of the converters are identical and each converter is provided with voltage- and current-limitation mechanisms.

Referring to the figure, each converter unit is provided with two sensing loops which have a common output path. The voltage sense loop operates as long as the output current is below a predetermined value Io. When the output current approaches Io, the current sense loop starts controlling the voltage at node A. When the output current is equal to Io, the error voltage amplifier no longer drives the voltage at node A and this voltage is gradually pulled down as the output current increases. An integration effect is provided in the current sense loop to prevent the unit from operating in burst mode.

The converter units are paralleled as illustrated in the figure. When dynamic load variations occur, only one unit is involved and the response of the parallel arrangement is as good as it would be for a single unit. The arrangement has only an operating point, and provides good stability.

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