NdFeB磁石を使用した磁気式遊星・差動歯車装置の試作研究(パワーマグネティックス)

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Magnetic gearing has many advantages. For example, it has noncontact meshing, is noiseless, oil-free and maintenance-free. We tried various types of magnetic gearing and investigated their performance characteristics. All magnetic gearing has some typical characteristics. A spur gear has internal and external meshing by changing the center distance of the gear. Recently, we tested the magnetic planetary gearing for use in wind power generators. This report describes performance characteristics, specifically, transmitted power efficiency and load-carrying capacity, of planetary gearing with full depth using the rare earth permanent magnet NdFeB. The main test parameters were the number of planet gears, input speed, and differential speed. Our results clarified the performance characteristics of magnetic planetary and differential gearing. The gear system was able to maintain a constant output speed for the sun gears by a differential operating outer ring gear despite a random input speed for the planetary gear. This system would be effective for wind power generators.
2007-03-01