1. Power electronic device temperature estimation and control in pulsed power and converter applications
- Author
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Musallam, Mahera, Acarnley, Paul P., Johnson, C. Mark, Pritchard, Len, and Pickert, Volker
- Subjects
- *
POWER electronics , *PULSED power systems , *POWER resources , *ESTIMATION theory , *TEMPERATURE control , *MATHEMATICAL models - Abstract
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 (0.1Hz) output power modulation. The amplitude of device temperature variations is reduced by at least 50%. [Copyright &y& Elsevier]
- Published
- 2008
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