Patent ID: 8810098
Filing Date: 2014-08-19
Classification: H02K

Abstract:
1. A magnetic gear arrangement comprising: a magnetically active gear member for generating a first magnetic field, the magnetically active gear member having a plurality of poles; a magnetically passive gear member; and a number of interpoles disposed between the magnetically active gear member and the magnetically passive gear member for modulating the first magnetic field, wherein a number of magnetic poles are generated within the magnetically passive gear member by the modulated first magnetic field, the generated magnetic poles forming a second magnetic field, the magnetically passive gear member having slots which disrupt generation of selected distributions of the generated magnetic poles, the number of magnetic poles generated within the magnetically passive gear member is equal to the difference between the number of poles on the magnetically active gear member and the number of interpoles, and the magnetically passive gear member is formed of a sufficiently magnetically hard material that the first magnetic field couples to the second magnetic field to produce a gear ratio between the magnetically active and the magnetically passive gear members.