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Power electronic device temperature estimation and control in pulsed power and converter applications

Lookup NU author(s): Mahera Musallam, Professor Paul Acarnley, Clare Johnson, Dr Len Pritchard, Professor Volker Pickert

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Abstract

Reliable functioning of a power electronic switching device is limited not only by the instantaneous device junction temperature but also by its variation. A technique for reducing the device temperature variation is described. A simplified mathematical model of the thermal process in the device is evaluated in real time to estimate the instantaneous device temperature. A temperature control loop adjusts the device switching losses to compensate changes in conduction loss, thus keeping the total losses, and hence the temperature, substantially constant. This principle is applied to a pulsed power supply and to a PWM converter operating at a very-low-frequency (0.1 Hz) output power modulation. The amplitude of device temperature variations is reduced by at least 50%. © 2008 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Musallam M, Acarnley PP, Johnson CM, Pritchard L, Pickert V

Publication type: Article

Publication status: Published

Journal: Control Engineering Practice

Year: 2008

Volume: 16

Issue: 12

Pages: 1438-1442

Print publication date: 01/12/2008

ISSN (print): 0967-0661

ISSN (electronic): 1873-6939

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.conengprac.2008.04.001

DOI: 10.1016/j.conengprac.2008.04.001

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