Abstract
A magnetic gear can transmit torque without contact by magnetic force. So it doesn't have wear, dust, vibration and noise. Therefore we don't have to use lubricant oil. In addition the magnetic gear has a torque limiter function. Many kinds of the magnetic gear are studied, but the magnetic gears have a demerit which the use efficiency of magnet is low. So surface permanent magnetic gears are studied because of their high magnet use efficiency and large transmission torque. However surface permanent magnetic gears are difficult to assemble. In this research, a prototype surface permanent magnetic gear which has the structure of only one layer with stackable structure is produced, measured the characteristic and examined, before producing the magnetic gear with multilayered structure. A new type magnetic gear is confirmed to be able to transmit the rotary motion through experiments.
