1. Chapter 3 Supplementary Components and Systems
“Introduction to Modern Power Electronics”, 2nd Ed., John Wiley 2010 by
Andrzej M. Trzynadlowski

2. Driver for an SCR with transformer isolation
Fig. 3.1
Chapter 3

3. Optically isolated driver for an SCR
Fig. 3.2
Chapter 3

4. Non-isolated driver for a triac
Fig. 3.3
Chapter 3

5. Optically isolated driver for a triac
Fig. 3.4
Chapter 3

6. Driver for a GTO with transformer isolation
Fig. 3.5
Chapter 3

7. Non-isolated drivers for a BJT: (a) single-transistor driver, (b) driver with a class B output stage
Fig. 3.6
Chapter 3

8. Antisaturation Baker’s clamp for a BJT
Fig. 3.7
Chapter 3

9. Driver for a BJT with transformer isolation
Fig. 3.8
Chapter 3

10. Driver for a BJT with transformer isolation
Fig. 3.9
Chapter 3

11. Gate drive for a power MOSFET with a high-current TTL clock driver
Fig. 3.10
Chapter 3

12. Driver for a power MOSFET with transformer isolation
Fig. 3.11
Chapter 3

13. Driver for a power MOSFET with optical isolation
Fig. 3.12
Chapter 3

14. SCR crowbar for overcurrent protection of a power electronic converter
Fig. 3.13
Chapter 3

15. Totem-pole arrangement of two switches in a leg of a bridge topology
Fig. 3.14
Chapter 3

16. BJT-based chopper with an RC snubber: (a) circuit diagram, (b) equivalent circuit in the off state
Fig. 3.15
Chapter 3

17. Voltage and current waveforms in the chopper of Fig. 3
Voltage and current waveforms in the chopper of Fig. 3.15: (a) without snubber, (b) with snubber
Fig. 3.16
Chapter 3

18. Switching trajectories of the BJT of Fig. 3. 15: chopper iof Fig. 3
Switching trajectories of the BJT of Fig. 3.15: chopper iof Fig. 3.15: (a) without snubber, (b) with snubber
Fig. 3.17
Chapter 3

19. Snubbers for: (a) power diode, (b) SCR
Fig. 3.18
Chapter 3

20. GTO with turn-on and turn-off snubbers
Fig. 3.19
Chapter 3

21. Combined on-and-off snubber for a transistor
Fig. 3.20
Chapter 3

22. Snubber for transistors in bridge converters: (a) RC, (b) RCD, (c) charge and discharge RCD, (d) discharge-suppressing RCD
Fig. 3.21
Chapter 3

23. Turn-off capacitive snubber with passive energy recovery
Fig. 3.22
Chapter 3

24. Turn-off capacitive snubber for a GTO with active energy recovery
Fig 3.23
Chapter 3

25. Chapter 3

26. Power diode with a heat sink: (a) physical arrangement, (b) thermal equivalent circuit
Fig. 3.24
Chapter 3

27. Block diagram of an adjustable-speed ac drive
Fig. 3.25
Chapter 3