磁体与非磁性运动导体相互作用之讨论

通过分析磁体与非磁性运动导体间的相互作用,发现了一种由非磁性运动导体驱动永磁体转动的非接触驱动方式.从分子环流模型出发,利用毕奥-萨伐尔定律,给出了所用矩形永磁体的磁场分布解析表达式,对运动导体处于永磁体下方5 mm处时永磁体的受力做了定量计算.对相互作用中的磁悬浮效应做了新的解释,澄清了PASCO公司对"磁悬浮实验装置"中由电磁感应产生的物理现象在原理解释上的模糊之处.

Discussion of the interaction between permanent magnet and moving non-ferromagnetic conductor

The interaction between the permanent magnet and the moving conductor is analyzed in detail,and a novel noncontact driving mode is discovered.A magnet can be driven to rotate around its central axis by moving a non-ferromagnetic conductor under it.From the molecular current viewpoint,an analytic expression exactly describing the magnetic field distribution of a rectangular permanent magnet is derived from the BiotSavart's law.And the force on the permanent magnet is calculated quantitatively when the conductor is moving five millimeters under the permanent magnet.Finally a new explanation for magnetic levition force is proposed and the inexplicit explanation on the principle of magnetic levitation experimental apparatus by PASCO company is clarified and the reason is presented for that the lift phenomena can only be observed in constrained case.