Power Electronics Introduction
PPoowweerr EElleeccttrroonniiccss Introduction
PEREC Outline 1. What is power electronics? The history Ⅲl. Applications MV. a simple example V. About this course 2
Power E l ect r o n cs i 2 Outline Outline I. What is power electronics? What is power electronics? II. The history The history III. Applications Applications IV. A simple example A simple example V. About this course About this course
PEREC I. What is power electronics? 1)Definition 2)Relation with information electronics 3The interdisciplinary nature 4)Position and significance in the human society 3
Power Electron cs i 3 I. What is power electronics? What is power electronics? 1) Definition Definition 2) Relation with information electronics Relation with information electronics 3) The interdisciplinary nature The interdisciplinary nature 4) Position and significance in the human society Position and significance in the human society
PEREC 1)Definition ◆ Power electronics is the electronics applied to conversion and control of electric power Range of power scale milliwatts(mW)-+megawatts(MW)-+gigawatts(GW) 4 A more exact explanation The primary task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads
Power Electron cs i 4 Power Electronics Power Electronics: A more exact explanation A more exact explanation: is the electronics applied to conversion and control of electric power. Range of power scale : Range of power scale : milliwatts(mW) megawatts(MW) gigawatts(GW) 1) Definition Definition The primary task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads
PEREC Conversion of electric power Electric t other names for electric Power Power Power nput output power converter∷ Converter Power converter Converter Control -Switching converter input Power electronic circuit Power electronic converter TWo types of electric power Changeable properties in conversion DC(Direct Current) Magnitude AC(Alternating Current) Frequency, magnitude number ot phases 5
Power Electron cs i 5 Conversion of electric Conversion of electric power Other names for electric Other names for electric power converter: power converter: -Power converter -Converter -Switching converter -Power electronic circuit -Power electronic converter Electric Power Converter Power output Power input Control Control input Frequency, magnitude, Frequency, magnitude, number of phases number of phases AC (Alternating Current) AC (Alternating Current) DC(Direct Current) DC(Direct Current) Magnitude Magnitude Changeable properties in Changeable properties in conversion conversion Two types of electric power Two types of electric power
PEREC Classification of power converters Power Power output DC AC put AC to AC converter AC AC to DC converter( Fixed frequency: AC controller (Rectifier) Variable frequency: Frequency converter or cycloconverter DC DC to dc converter DC to ac converter (Chopper) (Inverter)
Power Electron cs i 6 Classification of power converters Classification of power converters DC AC AC AC to DC converter (Rectifier) AC to AC converter ( Fixed frequency : AC controller Variable frequency: Frequency converter or cycloconverter ) DC DC to DC converter (Chopper) DC to AC converter (Inverter) Power output Power output Power input Power input
PEREC Power electronic system Generic structure of a power electronic system Powe Power Power input output Converter Feedforward Control input Feedback ( measurements measurements Controller of input signals of output signals Reference 4 Control is invariably required e Power converter along with its controller including the corresponding measurement and interface circuits, is also called power electronic system 7
Power Electron cs i 7 Power electronic system Power electronic system Generic structure of a power electronic system Generic structure of a power electronic system Power Converter Power output Power input Controller Feedforward Feedback Reference ( measurements measurements of output signals ) of output signals ) ( measurements of input signals ) Control is invariably required. Power converter along with its controller including the corresponding measurement and interface circuits, is also called power electronic system. Control input
PEREC A typical power electronic system Power input Power Power output Source Load Converter Electric utility Electric motor battery Measurements light other electric energy source heating power converter Controller other electric equipment Reference power converter The task of power electronics has been recently extended to also ensuring the currents and power consumed by power converters and loads to meet the requirement of electric energy sources
Power Electron cs i 8 A typical power electronic system A typical power electronic system The task of power electronics has been recently extended to also ensuring the currents and power consumed by power converters and loads to meet the requirement of electric energy sources. Electric Motor light heating other electric equipment power converter Power Converter Converter Source Power input Power input Power output Power output Load Controller Controller Reference Reference Electric utility battery other electric energy source power converter Vi ii io Vo Measurements Measurements
PEREC 2)Relation with information electronics t A classification of electronics by processing object Information electronics: to process information Electronics Power electronics: to process electric power e Other classifications of electronics Vacuum electronics: using vacuum devices e.g, vacuum tubes devices Electronics Solid(solid state) electronics: using solid state devices e.g, semiconductor devices Physical electronics: physics, material, fabrication Electronics and manufacturing of electronic devices Applied electronics: application of electronic devices to various areas
Power Electron cs i 9 A Classification of electroni A Classification of electronics by processing object cs by processing object 2) Relation with information electronics Relation with information electronics Electronics Electronics Information electronics: to process information Information electronics: to process information Power electronics: to process electric power Power electronics: to process electric power Other classifications of electronics Other classifications of electronics Electronics Electronics Vacuum electronics: using vacuum devices, Vacuum electronics: using vacuum devices, e.g, vacuum tubes devices e.g, vacuum tubes devices Solid (Solid state) electronics: using solid state devices, Solid (Solid state) electronics: using solid state devices, e.g, semiconductor devices e.g, semiconductor devices Electronics Electronics Applied electronics: application of electronic Applied electronics: application of electronic devices to various areas devices to various areas Physical electronics: physics,material,fabrication, Physical electronics: physics,material,fabrication, and manufacturing of electroni and manufacturing of electroni c devices devices
PEREC 3The interdisciplinary nature William E. Newell's description Electronics c o Power Power么 Electronics Continuous discrete Control epower electronics is the interface between electronics and power
Power E l ect r o n cs i 10 3) The interdisciplinary nature The interdisciplinary nature William E. Newell William E. Newell’s description s description Electronics Devices, circuits Power Static & rotating power equipment Power Electronics Continuous, Continuous, discrete discrete Control Power electronics is the interface between Power electronics is the interface between electronics and power. electronics and power
