FPGA-based real-time simulation of fault tolerant current controllers for power electronics

This paper investigates a FPGA-based Real-Time Simulation of Fault Tolerant Current Controllers (FTCC) algorithm for three phase inverter fed electrical systems. The focus of the proposed method is on the identification of the faulty current sensor in AC machines drives and the actual reconfiguration between two control-sampling times which ensures a safety continuous working of the faulty system. For performances verification, the method is analyzed within a FPGA-based Real-Time Simulator (RTS) of the studied electrical system, based on criteria such as accuracy, execution speed and implementation complexity. For the RTS modeling process, a multi-sampling approach is adopted allowing a real-time functioning with different time-steps. ModelSim simulations and experimental results are presented to emphasize the effectiveness of the proposed method.

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