Electromagnetic Design of Ultra-high Efficiency Permanent Magnet Machines with Integrated Drives

This paper investigates the electromagnetic design of an ultra-high efficiency interior permanent magnet synchronous machine with integrated drive system combining power-electronic inverters achieving higher efficiency rate than the currently highest IE5 premium high efficiency standard at the rated operation condition. The design concepts of a standard 55kW industrial motor driven system have been given firstly. Then, the topology and design parameters including slot-pole combinations, winding layouts, and rotor structure have been given after design optimization. The electromagnetic performance of the final optimal machine design has been analyzed, which validate the potential of proposed machine design to reach “IE8” efficiency standard.