Mathematical Modeling of Currents in Secondary Element of Linear Induction Motor with Transverse Magnetic Flux for Magnetic-Levitation Transport

The issues of improving modern and creating new types of transport are important and relevant for the development of human society. One of the most promising and environmentally friendly new types of vehicles is high-speed magnetic-levitation transport (MLT), moving at speeds of the order of 500 km/h and above. Magnetic-levitation trains are driven by linear motors which convert electrical energy directly into translational motion. One of the main types of traction machines for high-speed MLT are linear induction motors. This confirms the successful fifteen years of experience in the commercial operation of high-speed magnetic-levitation transport in the People's Republic of China. The article discusses linear induction motors with transverse magnetic flux (LIMTF), in which the power lines of the magnetic flux running in the longitudinal direction are closed in the transverse motion direction. In our opinion, LIMTF are the most promising for use in high-speed magnetic-levitation transport. A large influence on the magnitude of tractive effort LIMTF has a current distribution in the secondary element (SE), which plays the role of an anchor. The article presents the results of mathematical modeling of the current in the secondary element of a traction linear motor based on Maxwell's equations. For the analysis, the assumptions were made about the uniform distribution of magnetic induction in the air gap in the transverse direction and its sinusoidal direction in the longitudinal direction, which allowed developing a mathematical model of the current distribution in the secondary element, including the model with different relative positions of the LIMTF inductor relative to SE.