Study on the Vibration Mechanism of the Relay Coil in a Three-Coil WPT System

Liu, Suqi; Tan, Jianping

doi:10.2528/pierm18042603

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…The energy efficiency of the system does not exceed 33%. Liu and Tan (2018) proposed to embed a single relay coil inside the insulating pillar to realize wireless power supply of online monitoring equipment, and studied the optimal installation position of the relay coil, but there is no mention of the influence of the introduction of the relay coil on the insulation performance of the insulation strut. Zhang et al (2017) proposed a 12-coils insulator domino relay WPT system.…”

Section: Introductionmentioning

confidence: 99%

Research on optimal coil configuration scheme of insulator relay WPT system

et al. 2023

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This paper presents the optimized structure of the multi-relay coils insulator of WPT system. With the rapid development of the smart grid, on-line monitoring devices in the transmission tower have been widely used. However, the power supply problem has become an important bottleneck in the development of transmission tower intelligent sensing technology. Hence, the multi-relay coils wireless power transfer technology has been proposed to supply for the tower monitoring equipment in this paper. Compared with traditional multi-relay coils, the effects of the number, arrangement position and turns of relay coils on the performance of WPT system are further explored. The simulation results show that the operation performance of WPT can be significantly improved by optimizing the coil arrangement position and turns. Moreover, there are multiple configuration schemes that the design indexes of the system could be achieved. The experiment results show that in the 110 kV high-voltage transmission with the insulator length of 1.015 m, the transmitting power and efficiency of the WPT system could be increased to 1.81 W and 60.11% respectively by parameters optimization, which ensures the continuous and stable work of the monitoring equipment.

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Section: Introductionmentioning

confidence: 99%

Research on optimal coil configuration scheme of insulator relay WPT system

et al. 2023

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“…In the over-coupled regions, the frequency splitting occurs in the MCR-WPT systems (Sample et al, 2011). Also, the vibration phenomena of the receiver-coil or relay-coil occur in a three-coil MCR-WPT system (Liu et al, 2017;Liu and Tan, 2018b). Thus, the MCR-WPT system is quite sensitive to both the orientation and distance changes between the coils.…”

Section: Introductionmentioning

confidence: 99%

Transfer characteristics of the MCR-WPT system using two series transmitting coils

Liu

2019

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Purpose The impedance compensation approaches have been adopted to achieve the maximum output power and transfer efficiency in many magnetic coupling resonance wireless power transfer projects. However, it remains a challenge to obtain the constant output power and transfer efficiency in a fixed-frequency mode during variations in transfer distance and orientation of the coils. In this paper, using two series transmitting coils to achieve the constant output power and transfer efficiency is used. Design/methodology/approach First, the circuit model is established and transfer characteristics are studied. Second, using the two series transmitting coils to achieve the constant output power and transfer efficiency is investigated. Finally, the experimental system is designed; it can optimize the transfer performances by itself; the constant output power and transfer efficiency are achieved in the fixed-frequency mode. Findings When the receiving coil moves between the two series transmitting coils, the tolerance of the output power and transfer efficiency is less than 5 per cent. Research limitations/implications When a receiving coil is placed between the two series transmitting coils, there are space limits. The receiving coil only shifts between the two transmitting coils. Practical implications However, the rail guide vehicle may achieve constant output power and transfer efficiency when it moves on the rail guide. So, this topology may provide a practical solution. Originality/value In this research, the three-coil MCR-WPT system including two series transmitting coils is presented. In a fixed-frequency mode, the constant output power and transfer efficiency is achieved in experiments during variations in transfer distance and orientation of the coils. The fluctuation of the output power and transfer efficiency is less than 5 per cent.

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Using uniform magnetic field to obtain the constant output power and transfer efficiency for MCR-WPT

Liu

Tan

2019

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Purpose This paper aims to find an approach that achieves constant output power and transfer efficiency in an open space, such as charging pads. Design/methodology/approach In this study, a topology of the five-coil system including two transmitting coils is presented. Also, in a fixed-frequency mode and an open space, this study focuses on the two transmitting coils to achieve the uniform magnetic field and ultimately, attain the constant output power and transfer efficiency. Findings In a fixed-frequency mode and an open space, the constant output power and transfer efficiency is then achieved in experiments by inserting the relay loop into the uniform magnetic field. Practical implications An approach that achieves constant output power and transfer efficiency in an open space. The topology of the five-coil magnetically coupled resonant-wireless power transfer (MCR-WPT) system shows prospective value for various applications, which could be used at designing of wireless battery charger dedicated for cars or mobile phones. Originality/value By comparing the simulation and experimental results, the topology can be optimized in the transmission performance by itself. By doing so, the constant output power and transfer ef?ciency are achieved in the constant frequency mode.

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Study on the Vibration Mechanism of the Relay Coil in a Three-Coil WPT System

Cited by 5 publications

References 18 publications

Research on optimal coil configuration scheme of insulator relay WPT system

Research on optimal coil configuration scheme of insulator relay WPT system

Transfer characteristics of the MCR-WPT system using two series transmitting coils

Using uniform magnetic field to obtain the constant output power and transfer efficiency for MCR-WPT

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