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Wireless power transfer system with aligned two transmitters and one receiver for power distribution system in smart buildings

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Abstract

Intelligent houses and skyscrapers require many electronic devices for the smart control of building conditions. These devices make the power distribution system of buildings too complicated and expensive. Wireless power transfer (WPT) systems are one of the more promising candidates that simplifies power distribution systems. WPT systems via magnetic resonance coupling (MRC) can transmit power further and broader than WPT systems via inductive coupling. Moreover, recent architectures use an H-beam structure due to its durability and recyclability. Since the H-beam structure can be used as a guidance for WPT systems, the performance of the WPT system can be improved. Thus, this paper proposes a WPT system via MRC with aligned two transmitters (2-Txs) and one receiver to simplify the power distribution systems in smart buildings and to improve the power capability of WPT systems. The characteristics of a WPT system with 2-Txs according to variation of coil arrangement, coil size, and distance imbalance are investigated and verified by mathematical analysis and experimental results. In addition, a phase-shift control method is adopted and experimentally verified to control the output power without an additional power conversion circuit.

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Abbreviations

V S :

Voltage of the DC source

I 1 :

Current of transmitter Tx1

I 2 :

Current of transmitter Tx2

I R :

Current of receiver Rx

M 1 :

Mutual inductance between Tx1 and Rx

M 2 :

Mutual inductance between Tx2 and Rx

M 12 :

Mutual inductance between Tx1 and Tx2

ω :

Operational angular frequency

R p 1 :

Resistance of Tx1

R p 2 :

Resistance of Tx2

R S :

Resistance of Rx

R L :

Equivalent AC resistance of the load

C p 1 :

Capacitance of Tx1

C p 2 :

Capacitance of Tx2

C S :

Capacitance of Rx

L p 1 :

Inductance of Tx1

L p 2 :

Inductance of Tx2

L s :

Inductance of Rx

P L :

Output power

P in :

Input power

ƞ :

Power transfer efficiency

r :

Distance between Tx and Rx

θ :

Phase shift between Tx1 and Tx2

P o (θ):

Output power with phase shift

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Acknowledgements

This research was funded by the Korea Electric Power Corporation (Grant Number: R18XA06-66).

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Authors and Affiliations

  1. Department of Electronic Engineering, Hanbat National University, Daejeon, Korea

    Hyun-Woo You & Byoung-Hee Lee

  2. System Division, IMT Corp., Sejong, Korea

    Hyun-Woo You

  3. Department of Applied Artificial Intelligence, Ajou University, Suwon, Korea

    Jung-Hoon Park

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  1. Hyun-Woo You
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  2. Jung-Hoon Park
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Correspondence to Byoung-Hee Lee.

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You, HW., Park, JH. & Lee, BH. Wireless power transfer system with aligned two transmitters and one receiver for power distribution system in smart buildings. J. Power Electron. 22, 547–555 (2022). https://doi.org/10.1007/s43236-021-00377-8

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  • DOI: https://doi.org/10.1007/s43236-021-00377-8

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