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Battery emulator for traction drive hybrid energy system

When building inverters for traction drive motors, a test bench for optimization in conditions close to those for real operation can accelerate the procedure and its quality and efficiency. This is of prime importance for fuel cell based electric vehicles which are under intensive development, since they are expected to fill the gap for zero emission heavy duty vehicles where batteries cannot provide the necessary range and charging time. There is a  special interest in traction drive systems powered by combined fuel cell/ battery energy source, where an optimization in respect of efficiency and price can be achieved. In the classical approach the two energy sources are connected to a DC bus witch powers the traction inverter. In this work a battery emulator concept, design and realization as part of a 10kW test bench for optimization of the hybrid system fuel cell/battery is presented. Its advantage is that the tests are not limited by the battery capacitance. Moreover, the battery emulator has unlimited charge-discharge cycles and can be charged instantly in comparison to the real battery conditions. The battery performance is emulated based on the i-V curves which reflect the ability of the system to produce energy. The block diagrams of the charge and discharge capacitance calculators as well as of the whole emulator are presented. On this stage the emulator is built and the first experiments for validation of its are under preparation.

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Boychev D., Burdin B., Vladikova D., Battery emulator for traction drive hybrid energy system, Nanoscience & Nanotechnology, 20, N 1-2 (2022), pp. хх-хх, https://doi.org/10.xxxx/nsnt.2022.xxxx