THREE PHASE INVERTER AIM To simulate Three phase inverter using MATLAB Simulink model SOFTWARE USED MATLAB 2010 SIMULINK LIBRARY BROWSER Item Path Icon on the Simulink icon on Matlab taskbar Opening Simulink Type Simulink on Matlab Command Window Selecting New File File -> New -> Model Libraries ->SimpowerSystems Selecting DC Source -> electrical sources Libraries ->SimPowerSystems Selecting IGBT ->Thyristor Libraries ->SimpowerSystems Selecting Series RLC branch -> Elements Selecting Pulse Libraries -> Sources Generater(Triggering) Libraries -> Simulink Mux ->Commonly used blocks Libraries ->SimpowerSystems Voltage Measurement -> Measurement Scope Libraries -> Sink THEORY Device that converts dc input voltage to ac output voltage of desired magnitude and frequency is called an inverter.Inverters can be classified into single phase inverters and three phase inverters . Switching devices used in inverters uses PWM control signals for producing an ac output voltage. If the input voltage remains constant the inverter is called a Voltage source inverter and if the input current remains constant it is known as a Current source inverter. Three phase inverters are normally used for high power applications. A Three phase inverter can be obtained from a configuration of six transistors and six diodes as shown. Two types control signals can be applied to the transistors 180˚ conduction or 120˚ conduction.180 conduction has better utilisation of switches and is preferredmethod. In ˚conduction 180˚conduction mode each transistor conducts for 180˚ and in 120˚conduction mode each transistor conducts for 120˚ CIRCUIT
THREE PHASE INVERTER AIM To simulate Three phase inverter using MATLAB Simulink model SOFTWARE USED MATLAB 2010 SIMULINK LIBRARY BROWSER Item Path Icon Opening Simulink on the Simulink icon on Matlab taskbar Type Simulink on Matlab Command Window Selecting New File File -> New -> Model Selecting DC Source Libraries ->SimpowerSystems -> electrical sources Selecting IGBT Libraries ->SimPowerSystems ->Thyristor Selecting Series RLC branch Libraries ->SimpowerSystems -> Elements Selecting Pulse Generater(Triggering) Libraries -> Sources Mux Libraries -> Simulink ->Commonly used blocks Voltage Measurement Libraries ->SimpowerSystems -> Measurement Scope Libraries -> Sink THEORY Device that converts dc input voltage to ac output voltage of desired magnitude and frequency is called an inverter.Inverters can be classified into single phase inverters and three phase inverters . Switching devices used in inverters uses PWM control signals for producing an ac output voltage. If the input voltage remains constant the inverter is called a Voltage source inverter and if the input current remains constant it is known as a Current source inverter. Three phase inverters are normally used for high power applications. A Three phase inverter can be obtained from a configuration of six transistors and six diodes as shown. Two types control signals can be applied to the transistors 180˚ conduction or 120˚ conduction.180 ˚conduction conduction has better utilisation of switches and is preferredmethod. In 180˚conduction mode each transistor conducts for 180˚ and in 120˚conduction mode each transistor conducts for 120˚ CIRCUIT
three-phase-inverter.docx