电力电子技术第5版 教学课件 作者 王兆安 Chapter03.pptVIP

Outline 3.1 Single-phase controlled rectifier 3.2 Three-phase controlled rectifier 3.3 Effect of transformer leakage inductance on  rectifier circuits 3.4 Capacitor-filtered uncontrolled rectifier 3.5 Harmonics and power factor of rectifier circuits 3.6 High power controlled rectifier 3.7 Inverter mode operation of rectifier circuit 3.8 Realization of phase-control in rectifier circuits 3.1 Single-phase controlled  (controllable) rectifier 3.1.1 Single-phase half-wave controlled rectifier 3.1.2 Single-phase bridge fully-controlled rectifier 3.1.3 Single-phase full-wave controlled rectifier 3.1.4 Single-phase bridge half-controlled rectifier 3.1.1 Single-phase half-wave controlled rectifier Half-wave, single-pulse Triggering delay angle, delay angle, firing angle 3.1.1 Single-phase half-wave  controlled rectifier Inductive (resistor-inductor) load Basic thought process of time-domain analysis for power electronic circuits The time-domain behavior of a power electronic circuit is actually the combination of consecutive transients of the different linear circuits when the power semiconductor devices are in different states. Single-phase half-wave controlled rectifier with freewheeling diode Maximum forward voltage, maximum reverse voltage Disadvantages: Only single pulse in one line cycle DC component in the transformer current 3.1.2 Single-phase bridge  fully-controlled rectifier For thyristor: maximum forward voltage, maximum reverse voltage Advantages: 2 pulses in one line cycle No DC component in the transformer current 3.1.2 Single-phase bridge fully- controlled rectifier Resistive load Average output (rectified) voltage (3-9) Average output current (3-10) For thyristor (3-11)