Power electronics Chapter 5 DC to AC Converters Inverters
PPoowweerr EElleeccttrroonniiccss Chapter 5 DC to AC Converters ( Inverters )
PEREC Applications of Inverters 4 Conversion of electric power from dc type energy sources to ac type load Battery Photovoltaic cell (Solar cell) Fuel cell As a part of composite converter AC-DC-AC frequency converter(for AC motor drive) AC-DC-AC constant-voltage constant-frequency converter(for uninterruptable power supplies) AC-DC-AC Converters for induction heating AC-DC-AC-DC switching power supplies 2
Power Electron cs i 2 Applications of Inverters Applications of Inverters Conversion of electric power from DC type energy Conversion of electric power from DC type energy sources to AC type load sources to AC type load – Battery Battery – Photovoltaic Photovoltaic cell (Solar cell) cell (Solar cell) – Fuel cell Fuel cell As a part of composite converter As a part of composite converter – AC -DC -AC frequency converter (for AC motor drive) AC frequency converter (for AC motor drive) – AC -DC -AC constant AC constant -voltage constant voltage constant -frequency converter (for frequency converter (for uninterruptable uninterruptable power supplies) power supplies) – AC -DC -AC Converters for induction heating AC Converters for induction heating – AC -DC -AC -DC s witching power supplies itching power supplies
PEREC Outline 5.1 Commutation 5.2 Voltage source inverters 5.3 Current source inverters 5.4 Multiple- inverter connections and multi-level inverters 3
Power Electron cs i 3 Outline Outline 5.1 Commutation Commutation 5.2 Voltage source inverters 5.2 Voltage source inverters 5.3 Current source inverters 5.3 Current source inverters 5.4 Multiple 5.4 Multiple -inverter connections and multi inverter connections and multi -level inverters level inverters
PEREC 5.1 Commutation types Basic operation principle of inverters Load 15S pa classification of inverters Square-wave inverters(are discussed in this chapter) PWM inverters( will be discussed in Chapter 6) 4 the concept of commutation
Power Electron cs i 4 5.1 Commutation types Commutation types Basic operation principle of inverters Basic operation principle of inverters t uo i o t 1 t 2 Load S 1 S 2 S 3 S 4 i o uo Ud A classification of inverters A classification of inverters – Square -wav e inverters (are discussed in this chapter) inverters (are discussed in this chapter) – PWM inverters ( will be discussed in Chapter 6) PWM inverters ( will be discussed in Chapter 6) The concept of commutation The concept of commutation
PEREC 4 types of commutation ◆ Device commutation: Fully-controlled devices: GTO, IGBT, MOSFET Line commutation Phase-controlled rectifier Phase-controlled ac controller Thyristor cycloconverter 争 Load commutation 争 Forced commutation 5
Power Electron cs i 5 4 types of commutation types of commutation Device commutation: Device commutation: Fully -controlled devices: GTO, IGBT, MOSFET controlled devices: GTO, IGBT, MOSFET Line commutation Line commutation Phase -controlled rectifier controlled rectifier Phase -controlled AC controller controlled AC controller Thyristo Thyristor cycloconverter r cycloconverter Load commutation Load commutation Forced commutation Forced commutation