| Frequency Tracking of Resonance Frequency Variation of L-C Circuits for Wireless Energy Transmission to Medical Devices in Human Organs |
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Yoon-Myoung Gimm1, Young-Jun Ju1, Yu-Ri Lee1, Dong-Yeol Lee1, Jong-Wook Wang2 |
1Department of Electronics and Electrical Engineering, Dankook University
2EMF Safety Inc. |
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| Abstract |
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A capsular endoscope (CE) for inspection of the large intestine requires a motor for backward navigation against the autonomous travel in the intestine. This study proposes an HF power system for generating a magnetic field and for delivering wireless power to the internal or implanted medical devices. The magnetic field is generated by a wound coil (L) around a wooden frame, and the current is driven to the coil through a resonating capacitor (C). The characteristics of the resonance frequency shifting of the L-C series circuit are analyzed. A stable magnetic field intensity in the field coil is maintained by a specially designed frequency tracking system that automatically follows the L-C resonance frequency. Testing confirmed that the oscillation system tracks well the parameter changes of the electric components caused by the operating conditions or environmental variations. |
| Key words:
Wireless Power Transmission, L-C Resonance, Frequency Tracking Oscillator, Magnetic Field Generator |
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