Magnetic core position determining during its actuation by magnetic field by measuring differential induction from a temporal value of coil current from ohmic resistance of magnetic coil and change of coil current over time interval

摘要

A differential induction (Ld) may be measured from a temporal value of a coil current (i) using an expression Ld=(dt/(di(u-R.i) in which R represents the ohmic resistance of the magnetic coil and (d is the change in the coil current (i) in the time interval (dt and Ld is the core position.