Modeling and Analysis of Inductive Coil ELF Sensor

Abstract

Mathematical statistical analysis of inductive loop coil-sensor is carried out for its magnetic field effects operating on extremely low frequency (<30Hz). A system using resister, inductor, and capacitor effects finds resonance frequency for this loop sensor and its sensitivity as ferromagnetic effect. The design methods for these coils with air and ferromagnetic cores are technically compared and summarized, which are also known and used as search coils or pickup coils or magnetic loop coil sensors. The amplitude and bandwidth of the frequency components are compared to the standardized normal spectrum. This paper also presents the applications of coil sensor as magnetic coil.

Adapted Coil Sensors for Measuring the External Magnetic Field of Electrical Machines

“…Faraday's law states that the electromotive force induced (e) in a closed coil placed in a magnetic field is proportional to the variation over time of the flux of the magnetic field entering the circuit according to the following formula [12]: Figure 1 represents the schemes with (e) the voltage induced in a circuit which embraces the flux φ (t) during the duration dt [13]. In practice, the magnetic induction is often caused by several turns, each of which produces the same electromotive force "e.m.f".…”