Power Electronics and Motor Control

Abstract

This clear and concise advanced textbook is a comprehensive introduction to power electronics. It considers the topics of analogue electronics, electric motor control and adjustable speed electrical drives, both a.c. and d.c. In recent years, great changes have taken place in the types of semiconductor devices used as power switches in engineering applications. In this second edition of a popular text, a further completely new chapter has been added, dealing with the application of PWM techniques in induction motor speed control. The chapters dealing with electronic switching devices and with adjustable speed drives have been entirely rewritten, to ensure the text is completely up-to-date. With numerous worked examples, exercises, and the many diagrams, advanced undergraduates and postgraduates will find this a readable and immensely useful introduction to the subject of power electronics.

Reduction of dc voltage sources and switches in asymmetrical multilevel converters using a novel topology

“…The two main component of the power losses in a bi-directional switch are conduction losses and switching losses. The formulation for semiconductor switch power losses calculating are well established in the literatures and maybe readily applied [12]. However, in this paper the on-state voltage drop and switching losses are neglected for simplicity.…”

Microwave power control strategies on the drying process I. Development and evaluation of new microwave drying system

“…The triac is switched on by the gate current while the diac is turned on by the voltage applied to terminals. Shepherd, Hulley, and Liang (1995) stated the most important factors for making the optimal choice of power switch are the voltage and current ratings. Laster (1981) concluded that the key to selecting a proper thyristor is the consultation of the manufacturersÕ specification sheets based on the load characteristics such as voltage, current and power.…”

The CD-ROM Drive

“…In general, G 1 (s) may be replaced by a real gain because the channel electronics is much faster than the whole motor loop. The motor is of a DC type [62,98] and therefore Kt Hmot(s) == ( )( ) sLa + Ra sJrot + D + KeKt (4.5) when considered between the input voltage and output angular frequency.…”