Permanent-magnet synchronous motor, hereinafter referred to as PMSM, is widely utilized in the areas covering automatic production equipment, industry and business power supply, refrigerating air-conditioning ice maker and compressor motor, electric vehicle (EV), green energy related power generation, among others. PMSM, of which the drive and control that collectively dominate the expected performance and efficiency of system and play the key role in core technology leading to product development, has vast potentials in diverse markets.