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

Author(s): Sang Don Bu | Jin Kyu Han | Jin Young Hyeon | Gi Gwan Kim

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 05;
Issue: 08;
Start page: 317;
Date: 2013;
Original page

Keywords: Electromagnetic Induction; Electromotive Force; Resonator | Resonance/Anti-Resonance Frequency

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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