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Optimization of AC–DC Converters for Regenerative Train Suspensions | IEEE Journals & Magazine | IEEE Xplore

Optimization of AC–DC Converters for Regenerative Train Suspensions


Abstract:

This article focuses on the dynamic optimization of the operating conditions of two types of ac–dc converters, a diode bridge rectifier and a full bridge active rectifier...Show More

Abstract:

This article focuses on the dynamic optimization of the operating conditions of two types of ac–dc converters, a diode bridge rectifier and a full bridge active rectifier, which are used for interfacing regenerative rail vehicle suspensions based on ac electromagnetic generators. A theoretical analysis shows that, for both types of converters, the optimal operating conditions, leading to the maximization of the extracted power, can be predicted from the measurement of the generator speed. In particular, as regards the diode bridge rectifier, it is shown that the optimal value of the dc side voltage is related to the generator speed. As regards the active full-bridge rectifier, it is shown that a relationship exists between the optimal converter duty cycle and the generator speed. Experimental results validate the proposed theoretical models both in case of ideal constant generator speeds, and in case of more realistic time-variable generator speeds. The proposed analysis enables the design of high-performance speed-driven maximum power point tracking techniques for regenerative vehicle suspensions.
Published in: IEEE Transactions on Industry Applications ( Volume: 58, Issue: 2, March-April 2022)
Page(s): 2389 - 2399
Date of Publication: 16 December 2021

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I. Introduction

On board sensors used for continuous monitoring or tracking of freight railcars need energy supply for measuring and for transmitting information. The lack of electricity in freight cars can be overcome by resorting to the harvesting of wasted energy [1]–[3]. In particular, regenerative suspensions are aimed at the harvesting of the vibrations’ mechanical energy otherwise dissipated in traditional railcar suspensions. Different regenerative suspensions have been proposed in literature and the great majority of them exploit an electromagnetic generator to convert the mechanical energy into electrical energy [4].

References

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