Single phase Voltage Source Inverter using IGBT with dynamic thermal network

Datsen Davies Tharakan

Introduction:
Single phase Voltage Source Inverter (VSI) is very familiar DC-AC converter where input DC is a voltage source. Single phase VSI explained here uses full bridge topology with four IGBT switches (in 2 legs) to generate AC waveform at the output. Variable output is obtained by keeping input DC constant and varying the gain of the inverter. This can be accomplished by using Pulse Width Modulation (PWM) control technique. Among different PWM techniques available, Sinusoidal Pulse Width Modulation (SPWM) is implemented here to vary gain of the inverter and therefore achieve variable output voltage. This design example walks through the steps involved in modeling IGBT with dynamic thermal characteristics from manufacturer’s datasheet curves using IGBT model architect tool in SaberRD. Followed by, implementation of additional heat sink for better thermal management is explained in this design example.

Circuit Snapshot:
Refer to the attached snapshot "VSI_using_IGBT.PNG".

How to use the example:
Download the attached "single_phase_VSI_using_IGBT_dynamic_thermal.zip" and unzip the contents.
Open the Single_phase_voltage_source_inverter_using_IGBT.ai_dsn in SaberRD and run the experiments listed in the Experiment Analyzer.

For more details of the design, analysis to be performed and signals to be viewed refer to the README.pdf file in the folder.

Note:
This design example works only in SaberRD commercial edition 2015.03 and above.