宽调速机组在自动控制系统中是一种理想的新型执行元件,广泛应用于数控机床、自动控制机械、天文气象、雷达跟踪乃至机器人等自动控制系统。以往宽调速机组多用铁氧体永磁体做磁极,因而体积大,性能差,不能满足控制精度的要求。后来改用稀土钴永磁,电机体积缩小3/5,性能又有显著提高。但稀土钴价格昂贵,电机成本太高,不易推广。高性能 Wide speed control unit in the automatic control system is an ideal new type of actuator, is widely used in CNC machine tools, automatic control machinery, astronomy and weather, radar tracking and robot automatic control system. In the past a wide range of speed control unit with multi-purpose ferrite magnets do magnetic pole, and therefore bulky, poor performance, can not meet the requirements of control accuracy. Later switched to rare earth cobalt permanent magnet, motor size reduced by 3/5, performance has significantly improved. However, rare earth cobalt is expensive, the motor cost is too high, not easy to promote. high performance