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vol 63 / August, 2020
Article

DOI 10.17586/0021-3454-2019-62-9-843-850

UDC 62.50

SYNTHESIS OF THE CONTROL LAW OF A HIGH-POWER BRIDGE VOLTAGE CONVERTER

S. A. Alexandrova
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics; student


A. P. Baev
JSC Research Institute of Fine Mechanics, Saint Petersburg; Department Head


N. A. Nikolaev
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor


O. V. Slita
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics; Associate professor


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Abstract. A modified method of phase control is developed for a high-power dc bridge voltage converter is developed. The proposed method is based on variation of power transistors switching frequency. Предложенная методика основана на изменении частоты коммутации силовых ключей. In order to improve dynamic indices characteristics of the designed system and reliability and durability of the converter it is proposed to restrict maximal current switched by transistors and to use an algorithm of PI-control law with adjustable parameters which values depend on supply voltage.
Keywords: full-bridge inverter, soft commutation, pulse-width control, interval plant model, PI-controller with adjustable parameters, variable switching frequency

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