CHAPTER 12 AC Power Power Electronics

Classification of power electronic devices Figure 12.1 Figure 12.1 12-1

Power electric circuits Table 12.1 Table 12.1 12-2

AC-DC converter circuit and waveform Figure 12.2 Figure 12.2 12-3

AC-AC converter circuit and waveform Figure 12.3 Figure 12.3 12-4

DC-DC converter circuit and waveform Figure 12.4 Figure 12.4 12-5

DC-AC converter circuit and waveform Figure 12.5 Figure 12.5 12-6

Zener diode characteristic and voltage regulator circuit Figure 12.6 Figure 12.6 12-7

Practical voltage regulator Figure 12.8 Figure 12.7 Figure 12.7, 12.8, 12.9 Figure 12.9 12-8

Figure 12.10 Figure 12.11 Figure 12.10, 12.11 12-9

Limitations of a BJT amplifier Figure 12.13 Figure 12.13 12-10

BJT switching waveforms MOSFET switching waveforms Figure 12.14 Figure 12.15 Figure 12.14, 12.15 12-11

IGBT simplified equivalent circuit Figure 12.16 Figure 12.16 12-12

Rectifier connected to an inductive load Operation of a freewheeling diode Figure 12.18 Figure 12.17 Figure 12.17, 12.18 12-13

Three-phase diode bridge rectifier Waveforms and conduction times of three-phase bridge rectifier Figure 12.20 Figure 12.21 Figure 12.20, 12.21 12-14

Thyristor structure and circuit symbol Thyristor i-v characteristic Figure 12.23 Figure 12.22 Figure 12.22, 12.23 12-15

Thyristor two-transistor model Figure 12.24 Figure 12.24 12-16

Controlled rectifier circuit Half-wave controlled rectifier waveforms Figure 12.25 Figure 12.26 Figure 12.25, 12.26 12-17

The four quadrants of an electric drive Figure 12.33 Figure 12.33 12-18

Step-down chopper (buck converter) DC motor Step-down chopper (buck converter) Figure 12.34 Figure 12.35 Figure 12.34, 12.35 12-19

Step-down chopper waveforms Figure 12.36 Figure 12.36 12-20

Step-up chopper (boost converter) Figure 12.37 Figure 12.37 12-21

Step-up chopper output voltage waveform (ideal) Figure 12.38 Figure 12.38 12-22

Step-up chopper used for regenerative braking Figure 12.39 Figure 12.39 12-23

Two-quadrant chopper Figure 12.40 Figure 12.40 12-24

Half-bridge voltage source inverter Half-bridge voltage source inverter waveforms Figure 12.41 Figure 12.42 Figure 12.41, 12.42 12-25

Full-bridge voltage source inverter Half-bridge voltage source inverter output waveform Figure 12.43 Figure 12.44 Figure 12.43, 12.44 12-26

Three-phase voltage source inverter waveforms Figure 12.45 Figure 12.46 Figure 12.45, 12.46 12-27