Design of Variable Speed Three-Phase PMSM Series IE6 Efficiency Class

The maximum efficiency class of variable speed AC motor stipulated by IEC is IE5, but at present, design and manufacture of a series of products (frame number 80~355, IP55, IC416) of IE6(above IE5) efficiency classified variable speed three-phase permanent magnet synchronous motor or permanent magnet-assisted synchronous reluctance motor can be realized. This paper introduces the suggestions of IE6 efficiency classification, design method and design principles of three-phase permanent magnet synchronous motor series products, and finally verifies the feasibility of serial design through prototype trial production and test, which provides a reference for the determination and design of IE6 variable-speed motor efficiency classification.