250 W direct current motor of electric drive of railroad point for railway transport

Students Name: Savchuk Oleh Dmytrovych
Qualification Level: magister
Speciality: Electromechanical Automation Systems and Electric Drive
Institute: Institute of Power Engineering and Control Systems
Mode of Study: part
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: SavchukOD, MakarchukOV (head). 250 W direct current motor of electric drive of railroad point for railway transport. Master’s thesis. - Lviv Polytechnic National University, Lviv, 2020. Extended annotation The project is devoted to the development of a DC motor for the drive of switches on railway transport, improvement of its design in comparison with the existing prototype and the choice and justification of the control system of this drive. The project consists of an introduction, 5 chapters, conclusions to the work and a list of references. The total volume is 52 pages. The work contains 8 illustrations, 3 tables, a list of used sources of 6 items. The object of research is electromechanical and thermal processes in a DC motor with electromagnetic excitation to drive the arrows of railway tracks. Subject of research - methods, techniques, calculation algorithms designed to create DC motors with low-power electromagnetic excitation; circuit solutions of drive control systems based on such motors. The purpose of the study is to develop a project of a DC motor with electromagnetic excitation with a capacity of 250 W, which will provide technical requirements for switch electric drives on railway transport. The first section of the explanatory note considers the feasibility study of the chosen topic of the master’s qualification work, as well as specific design solutions that will be used in the future. The main advantages of using DC motors in drives [1], the main tasks of which are to switch the switch networks of railway transport. The nominal data of the drive motor and the advantages of using the electromagnetic method of switching turnouts are also given [2,3]. The second section presents the stages of electromagnetic calculation. The issue of designing DC motors with electromagnetic excitation is revealed. At the end of the section, a recalculation was performed in order to optimize the motor parameters by changing the design of the excitation winding used in the prototype machine to the second type with a doubled conductor cross section. After the design calculation, a recalculation of the performance of the modified engine was performed, as well as their comparison. The third section presents the thermal calculation of the engine with the determination of the excess temperature of the armature and collector over the ambient temperature. The fourth section discusses the features of the electric drive. The basic principles of operation of typical switch electric drives and their control system were described [4]. Key words: DC motor, electromagnetic excitation, electric pointer drive, railway transport, design method.