Browse Prior Art Database

DC Converter

IP.com Disclosure Number: IPCOM000082470D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Krumrein, W: AUTHOR

Abstract

In accordance with the circuit shown, the counter electromotive force (CEMF) forming during turnoff is limited to the terminal voltage V by energy being fed back to the network.

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DC Converter

In accordance with the circuit shown, the counter electromotive force (CEMF) forming during turnoff is limited to the terminal voltage V by energy being fed back to the network.

Transistor switches S1 and S1', or the like, are simultaneously opened or closed. The CEMF applied to primary coil P during turnoff is short-circuited via diodes D1 and D2 as long as its value is > V, where the CEMF flows back into the network. Limitation of the turn-off voltage ensures that the switches S1 and S2 are only subjected to a value which does not exceed that of the terminal voltage.

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