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Beat frequency oscillations in the output voltage of high voltage DC power supplies under pulsed loading

Vishwanathan, Neti and Ramanarayanan, V (2004) Beat frequency oscillations in the output voltage of high voltage DC power supplies under pulsed loading. In: PEDS 2003. The Fifth International Conference on Power Electronics and Drive Systems, 2003, 17-20 Nov. 2003, Singapore.

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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. Few converter topologies are proposed to tackle these problems. A study is made regarding the beat frequency oscillations that may exist with pulsed loading. It is illustrated with respect to the proposed converter topologies. Methods are proposed to eliminate or minimize these oscillations.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 2004 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 modubation;pulsed load;beat frequency oscillations.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 08 Mar 2012 04:47
Last Modified: 08 Mar 2012 04:47
URI: http://eprints.iisc.ac.in/id/eprint/43797

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