Adaptive Compensation Loop Control Method for Dynamic Range Wireless Power Transfer in Endoscopic Capsules Applications

Authors

  • Hao Zhang 1 School of Electronic and Optical Engineering Nanjing University of Science and Technology, Nanjing, 210094, China, 2 Department of Electrical and Computer Engineering National University of Singapore, Singapore, 117583, Singapore
  • Zheng Zhon Department of Electrical and Computer Engineering National University of Singapore, Singapore, 117583, Singapore
  • Wen Wu School of Electronic and Optical Engineering Nanjing University of Science and Technology, Nanjing, 210094, China

Keywords:

Adaptive compensation loop, dynamic range, enhanced nMOSFET, MPPC, resistor feedback network, WEC, WPT

Abstract

In this paper, an adaptive compensation loop control method is presented for dynamic range wireless power transfer (WPT) based wireless endoscopic capsules (WEC) applications. Rather than a fixed external resistor feedback network utilized in the DC-DC converter with maximum power point control (MPPC) capability, an enhanced nMOSFET based adaptive compensation loop is introduced to extract maximum power transfer from the RF-DC rectifier within overall operational power range of the WEC system. Simulation in ADS and measurement among three rectifiers with an LDO, a fixed external resistor feedback network and an adaptive compensation loop control are performed respectively to achieve a steady 3.3V on a resistive load of 100 omega, which validates that the proposed adaptive compensation loop control method realizes an extended dynamic power range with a lower limit of 21.5dBm to realize a minimum 100mW load DC power delivery for the IPT enabled WEC system.

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References

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H. Zhang, Z. Zhong, and W. Wu, “Extracting maximum efficiency of wireless power transfer in endoscopic capsule applications,” in Applied Computational Electromagnetics Society Symposium (ACES), 2017 International, pp. 1-2, 2017.

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Published

2021-07-25

How to Cite

[1]
Hao Zhang, Zheng Zhon, and Wen Wu, “Adaptive Compensation Loop Control Method for Dynamic Range Wireless Power Transfer in Endoscopic Capsules Applications”, ACES Journal, vol. 33, no. 05, pp. 499–504, Jul. 2021.

Issue

2018: Vol 33 Iss 5

Section

Articles