Permanent magnet AC servo motor with high performance and high quality Nd-Fe-B permanent magnetic materials,stable operation,good controllability, fast torque response,low temperature rise,the use of aluminum alloy chassis design,appearance neat,exquisite,compact volume,as a kind of high performance servo advanced execution unit,the main application of injection molding machines,CNC machining equipment and so on, and can meet the need of industrial automation process widely motion control.