Characteristics: Triac - nptel

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Lesson 4 Thyristors and <strong>Triac</strong>s Version 2 EE IIT, Kharagpur 2
Instructional objects On completion the student will be able to • Explain the operating principle of a thyristor in terms of the “two transistor analogy”. • Draw and explain the i-v characteristics of a thyristor. • Draw and explain the gate characteristics of a thyristor. • Interpret data sheet rating of a thyristor. • Draw and explain the switching characteristics of a thyristor. • Explain the operating principle of a <strong>Triac</strong>. Version 2 EE IIT, Kharagpur 3
Page 1: Module 1 Power Semiconductor Device
Page 5 and 6: A A p n - G K p n + n + (a) G (b) K
Page 7 and 8: Where I I +I is the total reverse l
Page 9 and 10: 4.4 Steady State Characteristics of
Page 11 and 12: V g V g max A E c d R g • S 2 P g
Page 13 and 14: Answer: (i) gate; (ii) break down,
Page 15 and 16: I av Amps 120 100 φ = 180° φ = 1
Page 17 and 18: Average Gate Power dissipation (P G
Page 19 and 20: Delay time (t d ): After switching
Page 21 and 22: The reverse recovery charge Q rr is
Page 23 and 24: 1 2 V 2 V V ( ∝) πω π i i H E
Page 25 and 26: G I G MT1 ( - ) I G N 2 I G I G N 3
Page 27 and 28: A 200 Bidirectional ON state curren
Page 29 and 30: vii. viii. To avoid unwanted turn o
Page 31 and 32: Lesson Summary • Thyristor is a f
Page 33 and 34: 1. Explain the effect of increasing
Page 35 and 36: Answers to Practice Problems Versio
Page 37 and 38: Since V g = 10 - i g R is tangent t
Page 39: 5. As soon as THA is turned on the

Characteristics: Triac - nptel

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