Prototype Production and Design of a Non-circular Magnetic Gear for Practical Applications

We studied a magnetic gear which is noiseless, oilless, and maintenance-fee, intend for use in a wind-power generator. Generally, industrial machines such as cams need not only a constant speed, but also a variable speed ratio and displacement. Cams can be replaced by eccentric gear or non-circular gear. In the latter case, it is reasonable to use a magnetic gear, because it has a flexible center distance and can be expected to act as a shock absorber in meshing.In this report, the operation principle of non-circular magnetic gear is explained and a method of designing such gears for practical use is discussed. The operation principle is demonstrated by reference to a trial model and the results of a static test of performance characteristics are examined.