Magnetic drive

摘要

A method is described, in the case of which a magnet wheel - consisting of a relatively large number of alternately arranged magnet poles - exchanges tangential forces with respect to a magnetically passive machine part and carries out mechanical-electrical energy conversion with respect to an additional machine part which has current-carrying windings (Fig. 2). Since the force effects are transmitted via the field which is produced by the magnet wheel, energy conversion takes place without contact. Using the wheel, electrical energy can be obtained from the movement energy of a vehicle, or mechanical energy can be supplied to the movement process. There are advantages with respect to the quality of the energy conversion (small air gap) in comparison with known linear drives. However, the method for energy conversion is not limited to linear movements. Possibilities are further described which increase the force effects transmitted between the wheel and the stationary machine part by means of auxiliary poles. The normal forces which occur in this case can be influenced and controlled by means of relatively simple power electronics methods. At the same time, it is possible to dispense with external energy sources and to implement a fast-acting, autonomous levitation control.