Power electronics Chapter I Power Electronic Devices (Part D)
PPoowweerr EElleeccttrroonniiccss Chapter 1 Power Electronic Devices (Part I)
PEREC Outline 1.1 An introductory overview of power electronic devices 1.2 Uncontrolled device-power diode 1.3 Half-controlled device -thyristor 1.4 Typical fully-controlled devices 1.5 Other new power electronic devices 1.6 Drive circuit for power electronic devices 1.7 Protection of power electronic devices 1.8 Series and parallel connections of power electronic devices 2
Power Electron cs i 2 Outline Outline 1.1 An introductory overview of power electronic devices An introductory overview of power electronic devices 1.2 Uncontrolled device 1.2 Uncontrolled device — power diode power diode 1.3 Half 1.3 Half-controlled device controlled device — thyristor thyristor 1.4 Typical fully 1.4 Typical fully -controlled devices controlled devices 1.5 Other new power electronic devices 1.5 Other new power electronic devices 1.6 Drive circuit for power electronic devices 1.6 Drive circuit for power electronic devices 1.7 Protection of power electronic devices 1.7 Protection of power electronic devices 1.8 Series and parallel connections of power electronic 1.8 Series and parallel connections of power electronic devices devices
PERec 1.1 An introductory overview of power electronic devices 4 The concept and features 4 Configuration of systems using power electronic devices ◆C| assifications 争 Major topics 3
Power Electron cs i 3 1.1 An introductory overview of power An introductory overview of power electronic devices electronic devices The concept and features The concept and features Configuration of systems usi Configuration of systems using power electronic devices ng power electronic devices Classifications Classifications Major topics Major topics
PEREC The concept of power electronic devices p Power electronic devices are the electronic devices that can be directly used in the power processing circuits to convert or control electric power 4 In broad sense Vacuum devices: Mercury arc rectifier thyratron, etc.. seldom in use today power electronIc devices Semiconductor devices major power electronic devices 4 Very often Power electronic devices= Power semiconductor devices 4 Major material used in power semiconductor devices Silicon
Power Electron cs i 4 The concept of power electronic devices The concept of power electronic devices Power electronic devices: Power electronic devices: In broad sense In broad sense Very often: Very often: Major material used in power semiconductor devices Major material used in power semiconductor devices —— Silicon Silicon are the electronic devices that can be directly used in the powe are the electronic devices that can be directly used in the power processing circuits to convert or control electric power. processing circuits to convert or control electric power. power electronic devices power electronic devices Vacuum devices: Mercury arc Vacuum devices: Mercury arc rectifier rectifier thyratron thyratron, etc. . seldom , etc. . seldom in use today in use today Semiconductor devices: Semiconductor devices: major power electronic devices major power electronic devices Power electronic devices = Power semiconductor devices Power electronic devices = Power semiconductor devices
PEREC Features of power electronic devices 4 The electronic 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 p=v=0 Off-state t Current through the device is 0 =v|=0 j=0 5
Power Electron cs i 5 Features of power electronic devices Features of power electronic devices The electronic power that power electronic device The electronic power that power electronic device deals with is usually much larger than that the deals with is usually much larger than that the information electronic device does. information electronic device does. Usually working in switching states to reduce power Usually working in switching states to reduce power losses On-state Voltage across the device is 0 p=vi=0 v=0 Off-state Current through the device is 0 p=vi=0 i=0
PEREC 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 4 Dissipated power loss usually larger than information electronic devices- special packaging and heat sink are necessary
Power Electron cs i 6 Features of power electronic devices Features of power electronic devices Need to be controlled by information electronic circuits. Need to be controlled by information electronic circuits. Very often, drive circuits are necessary to interface Very often, drive circuits are necessary to interface between information circuits and power circuits. between information circuits and power circuits. Dissipated power loss usually larger than information Dissipated power loss usually larger than information electronic devices electronic devices — special packaging and heat sink special packaging and heat sink are necessary. are necessary
PEREC Power losses on power semiconductor devices on.sta te turn in O ff-sta te turnon g (conduction state o ff (b lo cking sta te) .on Total power loss on power semiconductor conduction loss turn-off loss off-state loss turn-on loss (on-state loss) Switching loss 7
Power Electron cs i 7 Power losses on power semiconductor Power losses on power semiconductor devices devices O n - s ta te ( c o n duc tion s ta te ) tu r n in g - o ff O ff- s ta te ( b lo c k ing s ta te ) tu r n in g - o n t t t v i p = conduction loss + tur conduction loss + tur n-off loss + off off loss + off-state loss + turn state loss + turn-on loss on loss Total power loss Total power loss on power s power s e miconductor iconductor (on-state loss) state loss) Switc hing lo s s
Configuration of systems using power electronic devices Power electronic system Electric isolation optical, magnetic Control circuit (in a broad sense) detection circu oc Power circuit power stage, main circuit drive circuit o Protection circuit is also very often used in power electronic system especially for the expensive power semiconductors
Power E l ect r o n cs i 8 Configuration of systems using power Configuration of systems using power electronic devices electronic devices Control circuit detection circuit drive circuit Power circuit (power stage, main circuit) Control circuit (in a broad sense) Electric isolation: optical, magnetic Power electronic system: Protection circuit is also very often used in power electronic system especially for the expensive power semiconductors
PEREC Terminals of a power electronic device A power electronic device usually has A power electronic device a third terminal must have at least two control terminal to terminals to allow power control the states of circuit current flow through the device Drive Circuit E 4 Control signal from drive circuit must be connected between the control terminal and a fixed power circuit terminal (therefore called common terminal)
Power Electron cs i 9 Terminals of a power electronic device Terminals of a power electronic device C E G A power electronic device must have at least two terminals to allow power circuit current flow through. A power electronic device usually has a third terminal —— control terminal to control the states of the device. Control signal from drive circui Control signal from drive circuit must be connected between the t must be connected between the control terminal and a fixed power circuit terminal (therefore control terminal and a fixed power circuit terminal (therefore called common terminal ). called common terminal ). Drive Circuit
PEREC A classification of power electronic devices Uncontrolled device: diode (Uncontrollable device) has only two terminals and can not be controlled by control signal The on and off states of the device are determined by the power circuit Half-controlled device: thyristor ( Half-controllable device) is turned-on by a control signal and turned-off by the power circuit Fully-controlled device: Power MOSFET, IGBT, GTO, IGCT (Fully-controllable device) The on and off states of the device are controlled by control signals
Power Electron cs i 10 A classification of power electronic devices A classification of power electronic devices Uncontrolled dev Uncontrolled device: diode ice: diode (Uncontrollable device) (Uncontrollable device) Fully -controlled device: Power MOSFET, IGBT,GTO, IGCT controlled device: Power MOSFET, IGBT,GTO, IGCT (Fully -controllable device) controllable device) Half-controlled device: controlled device: thyristor thyristor (Half-controllable device) controllable device) has only two terminals and can not be controlled by control signal. The on and off states of the device are determined by the power circuit. is turned-on by a control signal and turned-off by the power circuit The on and off states of the device are controlled by control signals
