Download An Introduction to Thyristors and Their Applications by M. Ramamoorty PDF

By M. Ramamoorty

Show description

Read or Download An Introduction to Thyristors and Their Applications PDF

Best electronics books

The PIC Microcontroller: Your Personal Introductory Course (3rd Edition)

John Morton bargains a uniquely concise and functional advisor to getting up and operating with the PIC Microcontroller. The PIC is likely one of the preferred of the microcontrollers which are reworking digital undertaking paintings and product layout, and this ebook is the fitting advent for college students, academics, technicians and electronics lovers.

The Resource Handbook of Electronics

Development upon the large assets of Whitaker's The Electronics guide, The source instruction manual of Electronics deals the main entire choice of reference and tabular information to be had. It presents the information that engineers and technologists want in a transparent, concise layout that does away with precise factors and offers simply the facts-the crucial tables, charts, formulation, definitions, and equations with barely enough element to complete the duty to hand.

Additional info for An Introduction to Thyristors and Their Applications

Sample text

Communications and Electronics), 1960, p. 699. , The ratings ofSCRs when switching into high currents, IEEE Trans. (Communications and Electronics), 1963, p. 575. Newsam, B. al resistance: Its measurement and use in the rating of thyristor, lEE Conference Publication, No. 53, 1969, p. 85. Reed, J. , Dyer, R. , Power thyristor rating practices, Proc. IEEE, 1961, p. 1288. Rice, J. , Nickels, L. , Commutation dv/dt effects in thyristor 3-phase bridge converters, IEEE Trans. (lOA), 1968, p. 665. 1 SERIES-PARALLEL OPERATION OF SCRs Silicon-controlled rectifiers are now available with a voltage rating upto 10 kV and a current rating upto 1200 A.

More details on the on-off control scheme are given in Chapter 10. Transformer T can be introduced as shown in Fig. 2. I 2a to isolate the control circuit from the main power circuit if AC or pulse-firing is used for the gate drive. Diode D1 prevents negative source current and diode D2 limits the reverse voltage across the gate and the cathode. 12b shows a unijunction transistor (UJT) relaxation oscillator where the output pulses are coupled to the SCR gate through the isolation transformer T.

The capacitor 46 AN INTRODUCTION TO THYRISTORS AND THEIR APPLICATIONS discharges t~rough the triac gate. When the triac fires, the voltage drop across AB wlll be zero and the capacitor voltage will be reset to zero. A A Load R B Fig. 2 Diac phase-controlled circuit. similar operation takes place in th,e negative half-cycle, and a negative gate pulse will be applied when the diac breaks down in the reverse direction. By varying resistance R, the charging rate of capacitor C can be changed and thus the :firing angle can be controlled.

Download PDF sample

Rated 4.64 of 5 – based on 18 votes