LABORATORY SYSTEM FOR STUDY OF BRUSHLESS DIRECT CURRENT MACHINES

Petko Kostadinov; Vasil Dimitrov

Scientific paper ID 1879 : 2019/3

LABORATORY SYSTEM FOR STUDY OF BRUSHLESS DIRECT CURRENT MACHINES

Petko Kostadinov, Vasil Dimitrov

Contemporary electrical drives are highly efficient thanks to the precise microprocessor control and the use of the latest and highest quality materials for the production of electric motors. Therefore, in order to achieve ever greater efficiency of drive systems, attention is directed to electrical drives of mechanisms with a high moment of inertia and operating mode with frequent changes of speed. In these cases, during the operation, a large amount of kinetic energy is accumulated in the driven mechanism and converted to heat during breaking (irretrievably lost). In order to use this energy, the electric motor needs to be switched to a generator mode and to recover electricity to the grid. For this reason, the contemporary electrical drives high efficiency in generator mode. The need for a such type of electrical drives puts higher demands on research and the quality of education. In this paper, a system for study of a brushless DC machine operating in a generator mode is developed. A microprocessor control is provided to realize a pulse-width regulation of the load current. The existence of a torque measuring system as well as high accuracy voltage and current measuring devices gives the opportunity to study the load characteristics and efficiency of a brushless DC motor in a generator mode.

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електрозадвижване безчеткови електродвигатели BLDC широчинно-импулсна модулация (ШИМ) рекуперация енергийна ефективностelectrical drive brushless electric motors BLDC pulse-width modulation (PWM) recuperation energy efficiencyPetko Kostadinov Vasil Dimitrov

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