Using the slider to drive a metal bar to cut perpendicularly the uniform magnetic field in the center of a Helmholtz coil, induction electromotive force could be produced.
利用滑块带动金属杆切割亥姆霍兹线圈中心区域匀强磁场的磁感应线，可以产生感应电动势。
2
Based on its operation principle, a relatively accurate analytical expression of the magnetic levitation force for an induction-tyle bearing-less motor is proposed in this paper.
从运行原理出发，建立了感应型无轴承电机磁悬浮力的解析模型。
3
The common principle is the use of the induction of an electromotive force by the variation of the magnetic flux through a coil.