Power electronics Chapter 2 aC to Dc converters (Rectifiers)
PPoowweerr EElleeccttrroonniiccss Chapter 2 AC to DC Converters (Rectifiers)
PEREC Outline 2.1 Single-phase controlled rectifier 2.2 Three-phase controlled rectifier 2. 3 Effect of transformer leakage inductance on rectifier circuits 2. 4 Capacitor-filtered uncontrolled rectifier 2.5 Harmonics and power factor of rectifier circuits 2.6 High power controlled rectifier 2.7 Inverter mode operation of rectifier circuit 2.8 Thyristor-DC motor system 2.9 Realization of phase-control in rectifier circuits 2
Power Electron cs i 2 Outline Outline 2.1 Single -phase controlled rectifier phase controlled rectifier 2.2 Three 2.2 Three -phase controlled rectifier phase controlled rectifier 2.3 Effect of transformer leakage inductance on 2.3 Effect of transformer leakage inductance on rectifier circuits rectifier circuits 2.4 Capacitor 2.4 Capacitor-filtered uncontrolled rectifier filtered uncontrolled rectifier 2.5 Harmonics and power factor of rectifier circuits 2.5 Harmonics and power factor of rectifier circuits 2.6 High power controlled rectifier 2.6 High power controlled rectifier 2.7 Inverter mode operation of rectifier circuit 2.7 Inverter mode operation of rectifier circuit 2.8 Thyristor Thyristor-DC motor system DC motor system 2.9 Realization of phase 2.9 Realization of phase -control in rectifier circuits control in rectifier circuits
PERec 2.1 Single-phase controlled (controllable)rectifier 2.1.1 Single-phase half-wave controlled rectifier 2.1.2 Single-phase bridge fully-controlled rectifier 2.1.3 Single-phase full- wave controlled rectifier 2. 1. 4 Single-phase bridge half-controlled rectifier
Power Electron cs i 3 2.1 Single -phase controlled phase controlled (controllable) rectifier (controllable) rectifier 2.1.1 Single -phase half phase half-wave controlled rectifier wave controlled rectifier 2.1.2 Single 2.1.2 Single -phase bridge fully phase bridge fully -controlled rectifier controlled rectifier 2.1.3 Single 2.1.3 Single -phase full phase full -wave controlled rectifier wave controlled rectifier 2.1.4 Single 2.1.4 Single -phase bridge half phase bridge half-controlled rectifier controlled rectifier
F 2.1.1 Single-phase half-wave controlled rectifier 12 Resistive load ll VT R √2U2 sin otd(o) 12U2 (1+cos a)=0.450, I+ cos a (21) 2丌 2丌 串 Half-wave, single-pulse 4 Triggering delay angle, delay angle, firing angle
Power Electron cs i 4 2.1.1 Single -phase half phase half-wave controlled rectifier controlled rectifier Resistive load Resistive load T VT u1 u 2 R uVT u d i d a) 0 ωt 1 π 2 π ωt ωt ωt ωt u2 ug ud uVT α θ 0 b) c) d) e) 0 0 ∫ + = = + = π α α α π ω ω π 2 1 cos ( 1 cos ) 0.45 2 2 2 sin ( ) 2 1 2 2 d 2 U U U U td t (2-1) Half-wave, single wave, single -pulse Triggering delay angle, Triggering delay angle, delay angle, firing angle delay angle, firing angle
F 2.1.1 Single-phase half-wave controlled rectifier Inductive(resistor-inductor) load
Power Electron cs i 5 2.1.1 Single -phase half phase half-wave controlled rectifier controlled rectifier Inductive (resistor Inductive (resistor-inductor) load inductor) load u2 0 ωt 1 π 2 π ωt ωt ωt ωt ωt ug 0 ud 0 i d 0 uVT 0 θ α b) c) d) e) f) + + a) u1 T VT u2 uVT u d i d