Analysis and control of electromagnetic coupling effect of levitation and guidance systems for semi-high-speed Maglev train considering current direction

A semi-high-speed Maglev train with maximum speed of 200 km/h is being developed in Korea. It uses LIM as thrust and electromagnetic suspension as the levitation method. Owing to the compatibility of the rail with the previously developed urban Maglev train, the guidance magnet is placed near the levitation electromagnet. In that case, if power is applied to the levitation and guidance magnets, mutual magnetic flux interference develops at the overlapping portion of the rail. For stable control of the two systems, the coupling effect must be analyzed because the levitation and guidance electromagnets are not independent. This study aims to analyze coupling effects by considering the magnetic field and magnetic equivalent circuit. This study suggests two levitation and guidance systems for the semi-high-speed Maglev train by considering each electromagnetic characteristic depending on the current direction.