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Design of switched capacitor converter-based wireless power transfer using mutual inductance for micropower applications Cover

Design of switched capacitor converter-based wireless power transfer using mutual inductance for micropower applications

International Journal on Smart Sensing and Intelligent Systems
Volume 18 (2025): Issue 1 (January 2025)
By: ,  ,   and    
Open Access
|Feb 2025
Figures & tables

Figures & Tables

Figure 1:

WPT using DC–DC Converter Configuration. (A) Generalized block diagram of WPT using SCC network. (B) Proposed block diagram for WPT using SCC. SCC, switched capacitor converter; WPT, wireless power transfer.

Figure 2:

Proposed SCC circuit diagram. SCC, switched capacitor converter.

Table 1:

Voltage fraction 7/8

S1S2S3S4S5S6S7S8S9S10S11S12
ϕ1011010100000
ϕ2101010010000
ϕ3101001000010
ϕ4100100001010
Table 2:

Simulated output of WPT for different distance

Distance (mm)510151820
VR7/87/87/87/87/8
Input voltage2424242424
Output voltage2121212121
Load resistance (kOhm)1010101010
Receiving voltage20.9720.9620.9320.90320.89
Output power88.29 µW87.61 µW85.84 µW84.1 µW83.51 µW

[i] VR, voltage ratio; WPT, wireless power transfer.

Figure 3:

Simulated output of proposed WPT (Buck). (A) The input voltage, the converter's output voltage, and the WPT output. (B) Capacitor voltage C1 and C3. (C) Load change for WPT. WPT, wireless power transfer.

Figure 4:

Simulated results of the proposed system. (A) Boost output voltage. (B) Output voltage with different load resistance. (C) Distance measured of Boost WPT. WPT, wireless power transfer.

Figure 5:

Experimental prototype for SCC. (A) Switched capacitor converter. (B) Output voltage of proposed converter of ratio 7/8. SCC, switched capacitor converter.

Table 3:

Different VRs SCC output and WPT output

Voltage fractionInput voltageSCC output voltageReceiving end voltage
½24 V11.63 V10.81 V
1/324 V9.72 V8.98 V
1/424 V5.58 V4.82 V
1/524 V4.5 V3.79 V
1/624 V3.56 V2.73 V
1/724 V2.89 V1.89 V
1/824 V2.77 V1.97 V
2/324 V15.66 V14.79 V
2/524 V8.99 V8.29 V
2/724 V5.82 V5.13 V
3/424 V17.65 V16.88 V
3/524 V13.82 V13.17 V
3/724 V9.66 V8.87 V
3/824 V8.77 V7.97 V
4/524 V18.54 V17.89 V
4/724 V12.88 V11.93 V
5/624 V19.88 V18.93 V
5/724 V16.32 V15.48 V
5/824 V14.78 V13.99 V
6/724 V19.41 V18.46 V
7/824 V20.90 V19.73 V

[i] SCC, switched capacitor converter; VRs, voltage ratios; WPT, wireless power transfer.

Table 4:

Comparison with existing WPT topology

PapersBuck/BoostTopology usedInput voltageOutput voltageMaximum distanceEfficiency (%)
[2]BoostFrequency tracking WPT system based on PLL30 V106.8 (effective)5 cm70–80
[3]BoostWireless battery recharging14 V10 V–38 V15 cm<20
[7]BuckWPT (Resonant frequency technique)24 V23.5 V15 cm90–95
ProposedBuck/boostWPT using PWM SCC12 V-24 V1 V–21 V20 mm80–85

[i] SCC, switched capacitor converter; WPT, wireless power transfer.

DOI: https://doi.org/10.2478/ijssis-2025-0004 | Journal eISSN: 1178-5608
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Language: English
Submitted on: Dec 19, 2024
Published on: Feb 18, 2025
Published by: International Journal on Smart Sensing and Intelligent Systems
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
DC-DC,
SCC,
WPT,
Wireless
Related subjects:
Engineering,
Introductions and overviews,
Engineering, other

© 2025 Akshat Rawat, Sivaprasad Athikkal, S Saahithi, Vivekanandan Subburaj, published by International Journal on Smart Sensing and Intelligent Systems
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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