d) A thyristor in a fully-controlled converter that supplies 615 A to a D.C. load is mounted on a 0.5 kg aluminium heat sink. If the forward voltage across the device is 1.5 V, and aluminium has a specific heat capacity of 895 J(kg °C)-¹. The ambient temperature is 40 °C maximum and the thyristor is mounted directly on the heat sink. (i) Calculate the steady state temperature of the thyristor junction, given that the thermal resistance of the heat sink is 0.15 °C W-¹ and that of the device is 0.12°CW-¹. (ii) Calculate how long it takes the heat sink to reach a steady-state temperature?

d) A thyristor in a fully-controlled converter that supplies 615 A to a D.C. load is mounted on a 0.5 kg aluminium heat sink. If the forward voltage across the device is 1.5 V, and aluminium has a specific heat capacity of 895 J(kg °C)-¹. The ambient temperature is 40 °C maximum and the thyristor is mounted directly on the heat sink. (i) Calculate the steady state temperature of the thyristor junction, given that the thermal resistance of the heat sink is 0.15 °C W-¹ and that of the device is 0.12°CW-¹. (ii) Calculate how long it takes the heat sink to reach a steady-state temperature?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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