Articles of The Transactions of KSRC

Application of dynamic braking in frequency-controlled drives of ship machinery

Full text article ( in russian)

Year	2018
Issue	386
Volume	4
Pages	149-160
Caption	Application of dynamic braking in frequency-controlled drives of ship machinery
Authors	Vershinin V.I., Makhonin S.V., Parshikov V.A., Khomyak V.A. Application of
Keywords	automated frequency-controlled electric drive, frequency converter, asynchronous motor, electromagnetic torque, brake resistor, generator-based braking, dynamic braking, pulse-width modulation
DOI	10.24937/2542-2324-2018-4-386-149-160
Summary	Object and purpose of research.This paper studies automated frequency-controlled electric drive of a ship mechanism (thruster) in the electric propulsion system of various advanced ships. The purpose of this work is to develop a flow chart of frequency-controlled electric drive of ship mechanism (a thruster, as an example) that would feature, instead of currently used generator-based braking, the dynamic braking that offers significant gains in weight and size of the whole drive. Subject matter and methodsScientific and technical information, as well as personal findings and experience of the authors, gathered over the years of various R&D projects in electric drives for various ship machinery. The solution to the challenge discussed in this paper is based on the method of developing a frequency-controlled electric drive, where static converter can convert the system of three-phase voltage with constant parameters into the one with smoothlyadjustable parameters, as well as to convert the said system into the system of constant, smoothly-adjustable voltage. Main results.The authors have developed a flow chart of frequency-controlled electric drive for ship mechanism (thruster) with dynamic braking, as well as enumerated other ship machinery items where electric drives are also practicable to feature this system. Their results are confirmed by simulations of electromechanical processes taking place in given electric drive of ship thruster. The diagrams of these processes, as well as their analysis, are also given in this paper. Conclusion.These solutions can be implemented in development of electric drives for machinery of advanced ships.