High voltage DC power supply topology for pulsed load applications with converter switching synchronized to load pulses

Vishwanathan, N and Ramanarayanan, V (2004) High voltage DC power supply topology for pulsed load applications with converter switching synchronized to load pulses. In: The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003. , 17-20 Nov. 2003 .

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Abstract

High voltage power supplies for radar applications are investigated, which are subjected to pulsed load (125 kHz and 10% duty cycle) with stringent specifications (<0.01% regulation, efficiency>85%, droop<0.5 V/micro-sec.). As good regulation and stable operation requires the converter to be switched at much higher frequency than the pulse load frequency, transformer poses serious problems of insulation failure and higher losses. This paper proposes a methodology to tackle the problems associated with this type of application. Synchronization of converter switching with load pulses enables the converter to switch at half the load switching frequency. Low switching frequency helps in ensuring safety of HV transformer insulation and reduction of losses due to skin and proximity effect. Phase-modulated series resonant converter with ZVS is used as the power converter.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	HV Power supply;phase modulation;ZVS;pulsed load.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	29 Dec 2011 07:51
Last Modified:	29 Dec 2011 07:51
URI:	http://eprints.iisc.ac.in/id/eprint/42937

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