Along with the government and market take more and more attention to the energy efficiency of power supply, the loss of IGBT module, as the core device, has become a hot topic. Firstly, the dynamic process of IGBT module is analyzed, an accurate and an estimation method of loss calculate are provided, then the working process and resonant process of phase shift full-bridge soft switching converter is discussed, and constitute of IGBT module loss in the circuit is analyzed. Finally the loss is calculated in the 350A inverter welder example, and a conclusion of reliability and proposal for design are given according to the calculation results.

Dissipation Analysis of IGBT Module in FB-ZVZCS-PWM Converter

Insulated gate bipolar transistor(IGBT) physical models were studied to divide the IGBT into metal oxide semiconductor field effect transistor(MOSFET) and bipolar junction transistor(BJT) parts.A high voltage IGBT transient physical model was presented.The parameters extraction method was also given.The model in Matlab was tested in a Buck converter using FZ600R65KF1 IGBT with its parameters provided.By comparing the experiment and simulation results of voltage,current and powerloss waveforms during turn-on and turn-off transient,the accuracy of the transient model of high voltage IGBT is verified.

Transient high voltage IGBT physical model

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Transient high voltage IGBT physical model