驱动机床主轴电机的主轴伺服单元，一般是通过半导体开关元件对机床电流进行开关控制。由于常用的开关频率为数f赫兹，故电机会产生刺耳的磁噪音，成为环境问题的重要课题，特别是终日连续运转的FMS等，矛盾更为突出，在夜深人静的车间里，任一台机床的操作工对来自机床的噪音 Spindle servo motor drive spindle machine servo unit, usually through the semiconductor switching element on the machine current switch control. As the commonly used switching frequency of f Hz, so the machine will produce harsh magnetic noise, environmental issues have become an important issue, especially the continuous operation of the FMS all day, the more prominent conflicts in the deadlock in the workshop, any machine tool Operator’s noise from the machine tool