Characteristics of and Control over Resonance in the Electromotive Force of Electromagnetic Induction

DOI: 10.4236/jemaa.2013.58049   PDF   HTML   XML   3,809 Downloads   5,577 Views   Citations


The principles of electromagnetic induction are applied in many devices and systems, including induction cookers, transformers and wireless energy transfer; however, few data are available on resonance in the electromotive force (EMF) of electromagnetic induction. We studied electromagnetic induction between two circular coils of wire: one is the source coil and the other is the pickup (or induction) coil. The measured EMF versus frequency graphs reveals the existence of a resonance/anti-resonance in the EMF of electromagnetic induction through free space. We found that it is possible to control the system’s resonance and anti-resonance frequencies. In some devices, a desired resonance or antiresonance frequency is achieved by varying the size of the resonator. Here, by contrast, our experimental results show that the system’s resonance and anti-resonance frequencies can be adjusted by varying the distance between the two coils or the number of turns of the induction coil.

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S. Bu, J. Han, J. Hyeon and G. Kim, "Characteristics of and Control over Resonance in the Electromotive Force of Electromagnetic Induction," Journal of Electromagnetic Analysis and Applications, Vol. 5 No. 8, 2013, pp. 317-321. doi: 10.4236/jemaa.2013.58049.

Conflicts of Interest

The authors declare no conflicts of interest.


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