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PROFESSOR P.P. KOPNIAIEV -SCIENTIST, PUBLIC PERSON, ESTABLISHER OF HIGHER ELECTRICAL ENGINEERING EDUCATION (to the 150 th anniversary of his birth)Purpose. To carry out complete historical and scientific analysis of Professor P.P. Kopniaiev's activities and establish his role and place of achievements in the formation of the basic concepts and directions of the theory of electrical engineering and its practical application in the development of higher education in Ukraine. Methodology. We have applied general scientific methods of logic and classification, analysis and synthesis and special historical methods -historical-comparative, problemchronological, synchronic and diachronic. Results. On the basis of generalization of a wide range of sources of central, regional and personal archives, the principles and content of scientific-pedagogical, organizational and public activities of P.P. Kopniaiev were revealed and the classification of the scientific work according to the main directions of his research was conducted. Originality. Complex analysis of P.P. Kopniaiev's scientific-pedagogical, organizational and public activities were carried out in the field of higher electrical engineering education and industrial development in Ukraine, and his scientific achievements were classified according to the main directions. Practical value. Factual information, generalizations and conclusions can be applied in the teaching of humanitarian and engineering disciplines in higher education, in particular in the development of the lecture courses and textbooks used in educational activities, as well as in the preparation of general and scientific works on the history of science and technology. References 16, figures 4. Key words: electrical engineering science, higher education, Professor P.P. Kopniaiev, Kharkiv Polytechnic Institute.

Relations for the determination of energy, which can be returned to the power source of the electric vehicle when the braking system is implemented in the regenerative mode by the electric drive, are derived. The cases of dynamic decrease in speed and descent with a given speed are considered. The losses from frictional forces and aerodynamic drag of air are taken into account. The dependence of the specific energy saving on the parameters of motion is obtained. Calculations have been made for standard urban traffic cycles and it is shown that savings can reach 12…22% of total traffic consumption. References 11, figures 5.