In recent years, increased concern with environment sustainability and reduction of energy consumption has made the development of high efficiency motors more important [1, 2]. Many types of motors are being developed towards higher efficiency in order to meet the standards such as the Super Premium efficiency IE4 — published by the International Electrotechnical Commission (IEC). This includes induction motors, whose stator and rotor copper losses make them difficulty to achieve high efficiency. Permanent magnet motors can easily achieve high efficiency, but the cost is also high due to the expensive rare-earth magnet. Synchronous reluctance motors (SynRM) have now drawn more and more attention and are a potential competitor to induction motors. It also has the advantages of low manufacture cost and magnet free.