The block become magnetic when the current be switched on the electric coil around a field magnet that produces the magneto motive force to set up the flux in an electric machine. 在磁场周围能够产生磁发电机原动力在电器内产生电流的线圈。
By raising the internal magneto motive force of permanent magnet, stiffness and supporting capability of HMB can be increased and power consumption of control system decreased. 增加永磁体内部磁动势,可增大轴承的刚度,提高其承载能力以及降低控制功耗。