Study of eddy current power loss from outer-winding coils of a magnetic position sensor

The present analysis is concerned with eddy current power loss of a magneti c position sensor, which arises from a non-uniform flux linkage distributio n between magnetic material and position sensor. In the paper, a magnetic p osition sensor system is simplified to be an outer-winding coil along the a xial direction of a low carbon steel bar, and developed a numerical model t o compute the electrical characteristics by an excited current source. Acco rding to the simulated and measured data in this proposed model from 2.52 t o 11.37 Oes, eddy current power losses of conducting material have a variat ion of 6.1% and 9.77%, respectively. Finally, the phases of waveform of the induced output voltage will also be obtained in the conducting material, a nd have a variation of 3.68% obtained by using the current source in the pr oposed model. (C) 2000 Elsevier Science B.V. All rights reserved.