Lateral motion of a short-stator type magnetic wheel

The lateral motion of a magnetic wheel, using a single sided linear induction motor, is studied theoretically and experimentally. The characteristics of the linear motor under lateral displacement is calculated. The influence of its side force can be suppressed with a constant slip frequency control scheme and adequate dimensioning of the secondary rail. It is verified through test operation of the maglev vehicle HSST-03 in Vancouver. A theoretical basis to evaluate the lateral motion of the magnetic wheel is then established. The control scheme of a SLIM, which can compromise the energy efficiency of a drive system with lateral guidance ability, is derived. With design optimization of the SLIM and the reaction rail, the motor can provide a stabilizing force to the wheel and can reduce the side loading of electromagnetic suspension system.