https://orcid.org/0000-0003-1742-5526This example shows how to compute switching losses in a three-phase 3-level inverter, combining Specialized Power Systems and Simscape blocks.
01:45 Module 1_Calculation of Half Bridge IGBT with Loss
02:35 Module 2 & 3_Calculation of Half Bridge IGBT with Loss
05:22 Viewing Simulation outputs : Inverter's Switching Frequency, output power, Total losses & Junction Temperature @ IGBT Module 1
06:21 Additional Scopes: Calculation of Total Harmonic Distortion (THD % )
08:00 From t=0 sec to t=5 sec: the inverter outputs 372 kW (power factor = 0.85) using a switching frequency of 850 Hz. The converter total losses are 2.7 kW and the highest junction temperature (125 C) is observed on IGBT1 of Module 1 (or IGBT2 of Module 2). See Tj(Celsius) Scope block inside the Additional Scopes & Measurements block.
09:00 From t=5 sec to t=12 sec, the inverter outputs 210 kW (power factor = 0.85) using a switching frequency of 1850 Hz. The converter total losses are 2.7 kW and the highest junction temperature (125 C) is still observed on IGBT1 of Module 1.
The Phase-A leg is implemented using three Half-bridge IGBT with Loss Calculation blocks. Both switching and conduction losses are calculated and injected into a thermal network. The simulation illustrates the achievable output power versus switching frequency for the three-phase, 3-level inverter.
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