电力电子技术第5版 教学课件 作者 王兆安 Chapter02.pptVIP

Outline 2.1 An introductory overview of power electronic devices 2.2 Uncontrolled device — power diode 2.3 Half-controlled device — thyristor 2.4 Typical fully-controlled devices 2.5 Other new power electronic devices 2.6 Power integrated circuits and integrated power electronics modules The concept and features Configuration of systems using power electronic devices Classifications Major topics The concept of power electronic devices Power electronic devices: In broad sense Very often: Major material used in power semiconductor devices—— Silicon Features of power electronic devices The electric power that power electronic device deals with is usually much larger than that the information electronic device does. Usually working in switching states to reduce power losses Features of power electronic devices Need to be controlled by information electronic circuits.Very often, drive circuits are necessary to interface between information circuits and power circuits. Dissipated power loss usually larger than information electronic devices — special packaging and heat sink are necessary. Power losses on power semiconductor devices Configuration of systems using power electronic devices Terminals of a power electronic device A classification of power electronic devices Other classifications Major topics for each device Appearance, structure, and symbol Physics of operation Characteristics Specification Special issues Devices of the same family Passive components in power electronic circuit Transformer, inductor, capacitor and resistor These are called passive components in a power electronic circuit since they can not be controlled by control signal and their characteristics are usually constant and linear. The requirements for these passive components by power electronic circuits could be very different from those by ordinary circuits. 2.2 Uncontrolled device —Power diode PN junction PN junction with voltage