Torque Characteristics of Double Air-Gap PMSM for High Output and Safety Operation in Electric Power Equipments

In order to use electric energy economically and safely, technologies are being developed to identify the power usage condition in terms of electric motor and electric power application facilities. On that basis various technologies that enable energy saving and safe operation are being developed. This study was accomplished to select a double air-gap permanent magnet synchronous motor for energy-saving and for safe operation in electric motor facilities. The torque performance of the motor was analyzed from the economical perspective of the energy efficiency of the motor by the rotation speed and the safety aspect by the geometric shape of the permanent magnet and the pin bolt diameter for safe operation of the rotor composed of the permanent magnet and the iron core. The results of this study provide important information for improving energy saving and safe operation when applying various electric facilities such as elevators, air conditioning, and pumps by selecting a double air-gap motor.