software

In the NewControl project, a parameterizable model of a three-phase inverter with IGBT transistors was developed in MATLAB/Simulink. The model was created primarily for the purpose of modelling switching losses and power losses of IGBT switching elements. The model consists of three parts: the PWM signal generator, DC link and the inverter. The PWM signal generator block inserts the dead-time delays into ideal PWM signals, which prevent the upper and lower transistors in the one leg of the inverter from switching on at the same time. It serves as a short-circuit prevention in the DC link. The inverter model includes a simplified model of the gate driver, whose output impedance determines the switching dynamics of the transistors. The switching element model consists of the IGBT model and the anti-parallel diode model. The IGBTs are characterized by basic parameters and voltage drops, parasitic capacitances and by defined temperature dependence. The anti-parallel diodes are also characterized similarly. The model is created using the Simscape library. The simulation of the inverter model with respect to the time constants of the simulated events requires a very short sampling period of 100 ps. Due to detailed parameterization, the inverter model allows simulation and subsequent detailed analysis of the behaviour of power elements during transient states (turn-on and turn-off of the transistor) and during steady states. It is possible to obtain basic information such as voltages vGE, vCE and current iC, but also voltage drops, charging and discharging of parasitic capacitances or individual components of the switching and power losses. It is possible to calculate and plot the total power losses and switching losses of the power element by using the prepared scripts. Scripts also allow to perform a simulation for a given temperature vector and thus obtain the temperature dependence of the switching losses and power losses of the IGBT elements.

IGBT inverter, power losses, switching losses, inverter model

4. 5. 2021

Software je umístěn na sharepointu NewControl skupiny.

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Poskytovatel licence na výsledek požaduje licenční poplatek

https://newcontrol.ceitec.cz/vysledky/igbt_inverter_model