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Optimal Design of a Resonance-Based Voltage Boosting Rectifier for Wireless Power Transmission.
Jaemyung Lim1, Byunghun Lee1, Maysam Ghovanloo1
1School of Electrical and Computer Engineering, Atlanta, GA, USA.
IEEE Transactions on Industrial Electronics (1982)
|December 19, 2017
Summary
A novel multi-cycle resonance-based voltage boosting rectifier (MCRR) enhances wireless power transfer by accumulating energy before boosting voltage. This new MCRR design achieves higher power delivery compared to conventional rectifiers.
Area of Science:
- Electrical Engineering
- Power Electronics
- Wireless Power Transfer
Background:
- Wireless power transfer systems require efficient voltage boosting rectifiers.
- Conventional rectifiers face limitations in delivering high power at designated voltages.
Purpose of the Study:
- To present the design procedure for a new multi-cycle resonance-based voltage boosting rectifier (MCRR).
- To achieve a desired power to the load (PDL) at a high voltage (HV) via a loosely-coupled inductive link.
Main Methods:
- The MCRR operates by shorting the receiver (Rx) LC-tank to harvest energy, then breaking the loop for voltage boosting.
- An iterative design procedure optimizes transmitter (Tx) and Rx coil geometries and the number of energy harvesting cycles (N).
Main Results:
- An optimized MCRR generated 20.9 VDC across a 100 kΩ load from a 1.8 Vp, 6.78 MHz input with 2.2% power transfer efficiency (PTE) and N=9 cycles.
- This performance surpasses a conventional half-wave rectifier (CHWR), which achieved only 13.6 VDC under identical conditions.
Conclusions:
- The MCRR design procedure enables higher PDL under specific constraints through optimized coil geometries and cycle counts.
- The developed MCRR offers a significant improvement over conventional methods for high-voltage wireless power transfer applications.
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