Abstract
The output power and transmission efficiency of the traditional single-wire electric-field coupling power transmission (ECPT) system will drop sharply with the increase of the distance between transmitter and receiver, thus, in order to solve the above problem, in this paper, a new nonlinear parity-time (PT)-symmetric model for single-wire ECPT system based on coupled-mode theory (CMT) is proposed. The proposed model for single-wire ECPT system not only achieves constant output power but also obtains a high constant transmission efficiency against variable distance, and the steady-state characteristics of the single-wire ECPT system are analyzed. Based on the theoretical analysis and circuit simulation, it shows that the transmission efficiency with constant output power remains 60% over a transmission distance of approximately 34 m without the need for any tuning. Furthermore, the application of a nonlinear PT-symmetric circuit based on CMT enables robust electric power transfer to moving devices or vehicles.
Highlights
Since the discovery of electricity, the power transmission has mainly depended on the wires, and the way of power transmission through wires requires at least two wires to provide conduction paths for conduction current, which may be difficult to install and has a large number of safety issues, such as the risk of fire and electric shock caused by short circuits
In the early 20th century, Nikola Tesla first proposed the concept of wireless power transmission (WPT) [1], which is a novel technology that can transfer power through air without wires
Of theofentire single-wire system.to Besides, the implementation of the negative resistor is not attaining a PT‐symmetric mode of the entire single‐wire electric-field coupling power transmission (ECPT) system
Summary
Since the discovery of electricity, the power transmission has mainly depended on the wires, and the way of power transmission through wires requires at least two wires to provide conduction paths for conduction current, which may be difficult to install and has a large number of safety issues, such as the risk of fire and electric shock caused by short circuits. In the early 20th century, Nikola Tesla first proposed the concept of wireless power transmission (WPT) [1], which is a novel technology that can transfer power through air without wires. His imagination about global power transmission without wires shocked the world. Whereas keeping constant output power while maintaining high constant transmission efficiency against variable distance is a significant challenge for single-wire ECPT systems. In order to make the output power and efficiency of the single-wire ECPT system robust to the transmission distance, in this paper, a novel nonlinear PT-symmetric model based on CMT for single-wire ECPT system is proposed. The results by the analysis of circuit simulation show that the transmission efficiency with constant output power remains near 60% within the critical distance of 34 m
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