Load-Independent Output Voltage Analysis of Multiple-Receiver Wireless Power Transfer System

Sun, Longzhao; Tang, Houjun; Zhong, Shuangling

doi:10.1109/lawp.2015.2502942

Cited by 56 publications

(20 citation statements)

References 14 publications

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“…However, numerous technological difficulties still remain to be solved in the application of WPT to a system containing multiple loads (i.e., several items of electrical equipment). Firstly, in terms of the modelling of the system, an increase in the number of loads introduces more variables and higher-order nonlinearities [13][14][15]. Secondly, different loads will have dissimilar power demands.…”

Section: Introductionmentioning

confidence: 99%

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

Tan

Zhang

Wang³

et al. 2019

Energies

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As is common in multi-load wireless power transfer (WPT) systems based on series–series compensation topology, the power received by loads and the efficiency of the process are highly sensitive to changes in the number of loads. To guarantee that the power supplied to a load remains stable when other loads access or leave the system, we propose an improved multi-load system for WPT. The new system uses an LCC/S topology (based on inductor–capacitor–inductor or LCL topology) to keep the power received by the loads stable. By comparing two scenarios (ideal and real models based on LCC/S topology), we aim to eliminate cross-coupling between receiving coils by connecting compensating capacitors in series on the receiving side. In this way, the stability of the power received by loads is further improved. Moreover, a method of optimizing control over the efficiency is proposed based on the effect on the overall efficiency of impedance and number of loads. This allows us to optimize the overall efficiency of the system. Finally, a system to verify our theoretical analysis is established and used to show the validity and effectiveness of the proposed system.

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Section: Introductionmentioning

confidence: 99%

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

Tan

Zhang

Wang³

et al. 2019

Energies

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“…Some research on single-transmitter multiple-receiver WPT (STMRWPT) systems is presented in [24,[32][33][34][35][36]. A STMRWPT system is developed in [32] for portable devices which are of low-complexity receiver design.…”

Section: Introductionmentioning

confidence: 99%

“…To provide high efficiency and target output power in a two-receiver WPT system, a control strategy based on simplified math model is proposed [35]. To meet the constant source supply, a load independent output voltage method [36] is proposed to satisfy the demands of different load devices. However, STMRWPT systems are mostly applied for portable devices which do not need accurate tuning.…”

Section: Introductionmentioning

confidence: 99%

Management of Multiple-Transmitter Multiple-Receiver Wireless Power Transfer Systems Using Improved Current Distribution Control Strategy

Cai

Lai

et al. 2019

Electronics

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For high-power single-transmitter single-receiver wireless power transfer (STSRWPT) systems, the coils suffer from high voltage and current stresses. With increased power requirements, the coils become bottlenecks for power flow. To increase the power level, multiple-transmitter multiple-receiver wireless power transfer (MTMRWPT) systems with parallel circuits are developed that reduce the voltage and current stresses on the coils and improve power-handling capability. Firstly, an improved current distribution (ICD) control strategy is developed to simultaneously achieve high transfer efficiency, balanced current distribution and constant output voltage. Secondly, it is further shown that the ICD control strategy has the advantage that the currents at the transmitter coils are balanced and it reduces the control complexity simultaneously. Thirdly, an asynchronous particle swarm optimization (APSO) algorithm is applied to the ICD control strategy to verify the feasibility of the proposed control strategy. Lastly, a two-transmitter two-receiver wireless power transfer (WPT) system based on the ICD control strategy is proved to obtain an efficiency of more than 89.1% and provides the target output voltage 20 V with balanced current distribution.

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“…The research of magnetic-resonance coupling is particularly prized in the areas of wireless power transfer (WPT) since this research was published in the US journal Science in 2007 [1]. Many interesting fields on magnetic-resonance WPT have been studied in just the last 10 years alone [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Methods of Kirchhoff's voltage law, band-pass filter theory, and coupled-mode theory are compared and discussed in [7,8]. Based on those methods, characteristic analysis of goal setting WPT systems are implemented in [9][10][11][12][13][14][15][16][17][18][19]. The systems consisting of multiple receivers (RXs) can be applied well to the scenario of a single charging platform.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Analysis of Multiple-Transmitter Wireless Power Transfer Systems

Jin

Wang

2018

International Journal of Antennas and Propagation

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The range of the power transmission region can be effectively enlarged by a multiple-transmitter (TXs) and single-receiver (RX) magnetic wireless power transfer (WPT) system. However, the power transfer efficiency (PTE) of the WPT system with two TXs and a single RX has been intensively studied in the past few years. Therefore, a deep analysis of multiple-TX WPT systems needs to be implemented urgently to achieve the highest PTE in a wider range of power transmission. This paper analyzes a general multiple-TX single-RX system in detail based on the circuit model. Two optimal conditions, in which the feeding amplitude ratios need be equal to the mutual inductance ratios and the optimal load should be connected to RX, are derived to obtain the highest PTE. In the experiment part, the feeding amplitude ratios for multiple TXs are implemented by a proposed lumped transformer for the first time. The use of the lumped transformer reduces the complexity compared with the use of multiple inverters to achieve predetermined feeding amplitude ratios. Multiple-TX systems are designed and measured to validate the theoretical analysis. Experimental results agree very well with theoretical calculations.

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Load-Independent Output Voltage Analysis of Multiple-Receiver Wireless Power Transfer System

Cited by 56 publications

References 14 publications

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

The Design and Optimization of a Wireless Power Transfer System Allowing Random Access for Multiple Loads

Management of Multiple-Transmitter Multiple-Receiver Wireless Power Transfer Systems Using Improved Current Distribution Control Strategy

Efficiency Analysis of Multiple-Transmitter Wireless Power Transfer Systems

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