Relationship between number of teeth and positioning accuracy on cylindrical magnetic gear

A magnetic gear can transmit a torque and a motion without the contact by the magnetic force. Today a magnetic gear are studied about increasing transmit torque and decreasing cogging torque. The property of the positioning is another significant property in use of a motion transmission by magnetic gears. Therefore it is important to measure the positioning property. The purpose of this research is to check the relationship between the number of the magnet of the gear and positioning property. Then we have developed three types of gear which have a different number of teeth severally. By using the developed three types of gear, the average and the standard deviation are calculated from experimental results. We reveal the influence of the number of the teeth to positioning property in several operation conditions.