Power electronic converters are essential components in the fuel cell electric vehicle (FCEV) powertrain, which precisely control the power output of the fuel cell stack, the charging and discharging process of the ba...
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Power electronic converters are essential components in the fuel cell electric vehicle (FCEV) powertrain, which precisely control the power output of the fuel cell stack, the charging and discharging process of the battery, and the operation of the traction motor. The hardware-in-the-loop (HIL) simulation plays an important role in the rapid validation of power converters in their early development stages. In this study, a device-level model of the power converters in FCEV powertrain is developed for the fpga-based real-time simulation. By fulfilling the circuit topology partitioning and the switch model partitioning, the FCEV power electronic system can be simulated with sub-microsecond time-step while producing the detailed switching waveforms with 5 ns resolution. Therefore, the device electrical stress, and the switching power losses can be evaluated in realtime. Furthermore, the electro-thermal converter model is developed accordingly, which makes it possible to evaluate the IGBT/Diode thermal behaviour in the HIL simulation. In this study, the fpga hardware is designed with the NI LABVIEW fpga module and implemented on the NI-7975R FLEXRIO fpga board. The accuracy of the fpga-basedsimulation results is evaluated by the results from offline simulation tools. The effectiveness of the proposed model is then validated by the controller HIL experiments.
In this study, a comparison of various insulated gate bipolar transistor (IGBT) models for field-programmable gate array (fpga)-basedreal-timesimulation of power electronic devices is presented. System-level behavio...
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In this study, a comparison of various insulated gate bipolar transistor (IGBT) models for field-programmable gate array (fpga)-basedreal-timesimulation of power electronic devices is presented. System-level behavioural models include ideal, switching function and averaged models, and the detailed device-level model includes both linear behavioural and non-linear look-up table-based models of IGBT. A three-level 12-pulse voltage source converter system driving a squirrel-cage induction motor has been chosen as the test case system. The entire system including the controller and pulse width modulation (PWM) is implemented on a single fpga using very high-speed description language in real-time at a fixed time-step of 12.5 ns. The Altera Startix III fpga is the device used for real-timesimulation. Results obtained through all five models are compared and as expected, it has been found that the behaviour-mode simulation is fast but comes with a sacrifice of accuracy and details. A guideline is provided for the users with suggestions, so that the right kind of model can be selected for a particular study.
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