A study on the bearingless switched reluctance rotation motor with improved motor performance

Optimum product design can be realized through applying reasonable design of experiment (DOE) using state of the art computer simulations. The bearingless motor is a product combing the conventional electromotor with the active magnetic bearing (AMB) which rotates without a contact area. Therefore, it does not yield friction and there is no energy loss. The bearingless motor has a simple structure which enables high speed and precise positional controls. This study proposes an AMB with a new structure, which offers more stabilized rotations by enhancing flows of magnetic flux density. Also, this study provides optimum design of a bearingless motor which maximizes the torques, a general indicator of motor performances given conditions. For the purpose of designing a bearingless motor, proper design parameters have been selected. Design of experiment has been constructed using orthogonal arrays. Also, using the response surface method, an objective function which depicts the performance of a motor is obtained. The objective function which evaluates the performance of the motor has been optimized, and a bearingless rotation motor with the improved performance has been designed. By comparing the performance of the actual motor produced from the optimum design, the reliability is validated.