Patent ID: 6522517
Filing Date: 2003-02-18
Classification: G01R,H01F

Abstract:
A method for controlling the induction level of a magnetic body; said magnetic body being positioned relative to a conductive winding in such a way that a change of said induction level is associated with an induced voltage across said winding; said induced voltage being proportional to a rate of change of said induction level; said winding conducting an electric current; said method comprising the control of a voltage device connected to said winding; said voltage device producing an output voltage that controls said induced voltage, thereby controlling said rate of change of said induction level; said output voltage causing said induced voltage to have such waveform and magnitude so as to be approximately proportional to a preferred rate of change of said induction level;the instantaneous magnitude of said induced voltage differing from the instantaneous magnitude of said output voltage because of voltage drops associated with said electric current flowing through loop impedances; said method utilizing a parameter related to said electric current and characteristics of said loop impedances to control said output voltage so as to compensate for said voltage drops, thereby optimizing said output voltage for improved control of said inductions level.