A New Magnetic Coupler with High Misalignment Tolerance and Inherent Constant Current–Constant Voltage for Underground Wireless Charging

Kai Yan, Ruirong Dang (), Xudong Feng and Wenzhen Wang ()
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Kai Yan: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China
Ruirong Dang: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China
Xudong Feng: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China
Wenzhen Wang: Shaanxi Provincial Key Laboratory of Oil and Gas Well Measurement and Control Technology, Xi’an Shiyou University, Xi’an 710065, China

Energies, 2024, vol. 17, issue 20, 1-20

Abstract: In an underground inductive power transfer (IPT), it is inevitable to produce the phenomenon of misalignment between the transmitter and the receiver, which will reduce the output current, voltage and output efficiency of the whole IPT system. Aiming to solve this problem, a universal hybrid coupler is proposed, which can still stabilize the output in the expected range and has the ability of anti-misalignment when the X and Z directions are misaligned. The coupler is composed of a BP coupler and Γ type network. The secondary edge of the coupler introduces a Γ network, which decouples the two main coils on the same side of the receiver from the auxiliary coil and reduces the complexity of the system. The coupler can effectively reduce the coupling fluctuation caused by physical movement between the downhole transmitting end and the receiving end, thereby ensuring the stable output of the coupler. As a widely used IPT system, it can access the rest of the circuit topology whose output is independent of the load and achieve misalignment-tolerant output. Finally, based on the proposed hybrid IPT coupler theory, a 500 W misalignment-tolerant coupler prototype was built, and the compensation topologies were configured as series–series (SS) and series/inductance/capacitance/capacitor (S/LCC) structures. When the X and Z direction is misaligned, the constant current and voltage independent of the load can be output by switching the compensation topology. The experimental results are the same as the theoretical analysis.

Keywords: inductive power transfer (IPT); ? type network; misalignment tolerance; CC-CV; underground wireless charging (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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