Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2018
Date : August 28, 2018 - August 31, 2018
A new type of bearingless motor was developed. The feature of this bearingless motor is that it consists only of electromagnets without using a permanent magnet. The power supply to the rotor is performed by a non-contact power supply including a bridge rectifier circuit and a coil. The power receiving part of the non-contact supply is installed at the center of the rotor, and the power transmission part is installed just under the power receiving part. In the levitation method, the rotor coil is attracted to the stator coil, the rotor floats and suspends the rotor. Adjust the stator coil current to control levitation. The rotation method uses the difference between the number of teeth of the stator and the rotor, and controls the rotation by adjusting the current of the stator coil. In previous studies, bearingless motors consisting only of electromagnets were capable of stable levitation, but could not control rotation. This is believed to be caused by the number of turns of the coil wound on the rotor. In this paper, the rotational torque of a new rotor is determined by using electromagnetic field analysis software, design and fabrication are carried out, and the results of the levitation experiment are described.
