IMPLEMENTATION OF SYNCHRONOUS ELECTRIC MOTORS WITH PERMANENT MAGNETS IN THE TRACTION ELECTROMECHANICAL SYSTEMS OF TWO-AXLE ELECTRIC LOCOMOTIVES

Annotation. The article presents a study evaluating the feasibility and effectiveness of using an electromechanical traction complex based on synchronous motors with permanent magnets (SMPM) for two-axle electric locomotives. The author proposes a scientific research strategy in line with this topic, which, in order to obtain real scientific results, should be carried out logistically in the following format: starting at a preventive level and then moving on to a qualitative evidence-based level. It is emphasized that a sufficient level of efficiency in general, and energy efficiency in particular, can be achieved by integrating a corresponding control system (CS) for the speed of these types of traction electric motors (TEM) into the ETS variant with SMPM. An important positive aspect of such a development, taking into account the specifics of the operation of the analyzed types of electric locomotives – as a rule, underground operating conditions and the corresponding requirements for the special design of their equipment – is that a sensorless vector control option should be considered sufficiently feasible. An effective sub-option for the practical implementation of this idea is the use of high-frequency injection (HFI) to implement this control method. This will allow the necessary condition to be implemented in terms of circuitry – determining the position of the SMPM rotor at low speeds of the electric locomotive, which is characteristic of these types of electric locomotives according to established technologies for their operation. However, as established, the development of an effective algorithm for control actions of the control system in this format of operation requires the study of all factors influencing this process by rebuilding an adequate ETS controllability structure. The logistics for launching this format, as well as the option of the ETS development itself, are presented in this work.