Abstract
Purpose: Research and analysis of energy and dynamic characteristics of energy-efficient high-speed AC-to-DC converters with multiple semiconductor switching during supply voltage period.
Methodology: In order to find the analytical expressions describing the control and energy characteristics of single-phase and three-phase converters with multiple valve switching, the electrical methods, integral calculus and Fourier series have been used. The dynamic indicators have been calculated based on Matlab simulation modeling.
Results: The control characteristics of the converters under consideration have a good linearity and steepness growing due to increase in valve switching ratio, that indirectly indicates the growing response speed of these converters with increase in switching ratio. The power factor of the converters with multiple valve switching within the entire control range of average rectified EMF, except for its terminal points, is greater than the power factor of controlled rectifiers with natural thyristor commutation. Control frequency pass band for circuit level 0.7 of the electric drive with a single-phase bridge-circuit rectifier with natural valve commutation is not less than 5 Hz; and for the current circuit based on the converter with load connection ratio of 20 it is much wider - not less than 30 Hz.
Conclusion: The converters under Consideration should be used in high-speed DC drives of medium power, operating in modes of frequent reversals or in long-term braking modes.
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Vasilchenko, S.A., Cherny, S.P., Khrulkov, V.N. (2021). High-Speed Energy-Efficient Power Sources for Electromechanical Systems. In: Shakirova, O.G., Bashkov, O.V., Khusainov, A.A. (eds) Current Problems and Ways of Industry Development: Equipment and Technologies. Lecture Notes in Networks and Systems, vol 200. Springer, Cham. https://doi.org/10.1007/978-3-030-69421-0_14
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