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3ClassificationofPowerProcessorsandConverters3.1PowerProcessorsThe power processor usually consist of more than onepower conversion stage(converter变换器、变流器）.Mostpractical topologies require an energy storage elementwhich also decouples the input and the output sideconverters.PowerprocessorInputOutputConverter1EnergyConverter2storageelementFigure 1-6 Power processor block diagramE-mail:xjh
E-mail: xjh 8 uang@bjtu.edu.cn 3 Classification of Power Processors and Converters 3.1 Power Processors The power processor usually consist of more than one power conversion stage (converter变换器、变流器). Most practical topologies require an energy storage element, which also decouples the input and the output side converters
Example: AC Motor DrivePowerprocessoracacacConverter2Converter1dcmotorUtilityFigure 1-8 Block diagram of an ac motor drive..Converter 1rectifies line-frequency ac into do: Capacitor acts as a filter; stores energy; decouples: Converter 2 synthesizes adjustable -frequency ac to motor
Example：AC Motor Drive • Converter 1 rectifies line-frequency ac into dc • Capacitor acts as a filter; stores energy; decouples • Converter 2 synthesizes adjustable -frequency ac to motor
In most power processors, the input is from theelectric utility source. The output may have anyof the following forms:1. DC(a)Regulated(constant)magnitude，如开关电源(b)Adjustable magnitude，如直流调速器2.AC(a)Constantfrequency,adjustablemagnitude，如交流电源(b)Adjustable frequency and adjustable magnitude，如交流调速器（变频器、伺服控制器）
1. DC (a) Regulated (constant) magnitude，如开关电源 (b) Adjustable magnitude，如直流调速器 2. AC (a) Constant frequency, adjustable magnitude，如交流电源 (b)Adjustable frequency and adjustable magnitude，如交流 调速器（变频器、伺服控制器） In most power processors, the input is from the electric utility source. The output may have any of the following forms:
3.2 Power converters ★V According to average power flow direction, converters canbe divide into the follow categories:ElectricPowerPowerinputConverterPowerControl(1)Ac to dc----rectify,rectifier （整流器）inputoutput(2) Dc to dc----chop, chopper (斩波器)(3) Dc to ac----invert, inverter （逆变器）(4)Ac to ac----Fixed frequency :AC controller (交流电力控制器）Variable frequency:Cycloconverter（周波变换器）orac-ac frequency converter（交一交变频器）
(1) Ac to dc-rectify, rectifier（整流器） (2) Dc to dc-chop, chopper（斩波器） (3) Dc to ac-invert, inverter（逆变器） (4)Ac to ac-Fixed frequency :AC controller（交流电 力控制器） Variable frequency: Cycloconverter（周波变换器） or ac-ac frequency converter（交—交变频器） ✓According to average power flow direction, converters can be divide into the follow categories: Power output Electric Power Converter Power input Control input 3.2 Power converters ☆