Abstract—From a theoretical and practical point of view, in order to increase rating and decrease the cost and complexity of a multi-pulse rectifier, its pulse number has to be increased. In many industrial applications, a 20-pulse rectifier is suggested as the practical solution considering its simple structure and low weight. But, the 20-pulse rectifiers, suggested in different researches, must use filters to satisfy the DO-160G requirements for 21st and 39th harmonics for ac–dc more electric aircraft power systems. To overcome this problem, this paper proposes a novel 20-pulse rectifier for the ac–dc more electric aircraft power system based on a low-rating autotransformer. Also, a passive harmonic reduction circuit is utilized on the dc side of the 20-pulse rectifier in order to suppress the harmonics up to the 40th order according to DO-160G without using any filter. In this paper, simulations are provided in order to show the merits of this new rectifier over other proposed solutions. Then, an experimental prototype is implemented for evaluating and verifying the simulation results. By investigating the captured outcomes, this article concludes that the introduced design is practical and can simultaneously consider the trade-off among autotransformer structure, pulse number, complexity, rating, and cost.کلید واژگان :
Index Terms—Inter-phase transformer circuit, low-rating autotransformer, more electric aircraft, multi-pulse and 20-pulse rectifiers, total harmonic distortion reduction.
ارزش ریالی : 300000 ریال
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