Comparative Study of IPT Multi-Transmitter Coils Single-Receiver Coil System Focusing on Misalignment Tolerance and System Efficiency

Nutwong, Supapong; Sangswang, Anawach; Naetiladdanon, Sumate; Mujjalinvimut, Ekkachai

doi:10.23919/icems.2018.8548995

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…[65] found that with 12 cm of misalignment, efficiency drops as much as 25%. While [64] found that 3 different coupler structures experience up to 10% loss in efficiency at up to 5 cm misalignment in various directions. Another example is [66], where the mutual inductance at up to 200 mm of misalignment found that mutual inductance fell from 80 µH to as low as 5 µH at this misalignment.…”

Section: Misalignmentmentioning

confidence: 97%

“…A major identified limitation of IPT systems is the performance degradation due to misalignment between the transmitter and receiver plates [64]. Misalignment in IPT systems results in system instability, reduction of power transfer, and loss of system efficiency [64]. In IPT systems, the tolerance for misalignment is very low, with worsening performance as misalignment is increased.…”

Section: Misalignmentmentioning

confidence: 99%

“…In all cases in [64][65][66] as well as in [67], the correction of this intolerance to misalignment is achieved through the implementation of external coils to improve performance. Ref.…”

Section: Misalignmentmentioning

confidence: 99%

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A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

John Williams,

Wiseman,

Deilami

et al. 2023

Energies

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Light rail vehicles (LRVs) are increasingly in demand to sustainably meet the transport needs of growing populations in urban centres. LRVs have commonly been powered from the grid by direct-contact overhead catenary systems (OCS); however, catenary-free direct-contact systems, such as via a “hidden rail”, are popular for new installations. Wireless power transfer (WPT) is an emerging power transfer (PT) technology for e-transport with several advantages over direct contact systems, including improved aesthetics and reduced maintenance requirements; however, they are yet to be utilised in LRV systems. This paper provides a review of existing direct-contact and wireless PT technologies for LRVs, followed by an in-depth critical assessment of inductive power transfer (IPT) and capacitive power transfer (CPT) technologies for LRVs. In particular, the feasibility and advantages of CPT for powering LRVs are presented, highlighting the efficacy of CPT with respect to power transfer capability, safety, and other factors. Finally, limitations and recommendations for future works are identified.

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Section: Misalignmentmentioning

confidence: 97%

Section: Misalignmentmentioning

confidence: 99%

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A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

John Williams,

Wiseman,

Deilami

et al. 2023

Energies

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“…In this work, four identical coils are adopted as multiple transmitter coils (n = 4) with a single receiver coil. The transmitter coils are arranged based on the comparative study reported in [31], where high misalignment tolerance is obtained. The mutual inductance (M) and magnetic coupling coefficient (k) between the transmitter and receiver coils are dependent on the position of the receiver coil.…”

Section: Detection Of Receiver Coil Positionmentioning

confidence: 99%

“…In this work, four identical coils are adopted as multiple transmitter coils (n = 4) with a single receiver coil. The transmitter coils are arranged based on the comparative study reported in [31], where high misalignment tolerance is obtained. The mutual inductance (M) and magnetic Then, the receiver coil position can be calculated through the total primary current obtained during the detection mode operation, as discussed in Section 2.2.2.…”

Section: Detection Of Receiver Coil Positionmentioning

confidence: 99%

An Inverter Topology for Wireless Power Transfer System with Multiple Transmitter Coils

Nutwong¹,

Sangswang²,

Naetiladdanon³

2019

Applied Sciences

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This paper presents an inverter topology for a wireless power transfer (WPT) system that is intended to reduce the component counts and complexity of the conventional excitation circuit for multiple transmitter coils. The proposed inverter topology requires only (n+2) power switches, where “n” is the number of transmitter coils. An excitation of a proper transmitter coil pattern with regard to the receiver coil position is determined. The output voltage can be regulated through the primary-side control by adjusting the duty cycles of the inverter switches. A detection method of the receiver coil position is presented using the detection switches on the secondary side. The detection algorithm is based on the reflected impedance knowledge and requires only a current sensor on the primary side. A proper transmitter coil pattern is energized to ensure maximum transfer efficiency throughout the operation. The proposed system is experimentally validated on the created 500-watt WPT multi-coil system. After the receiver coil is placed in a designated area, the proper transmitter coil pattern can be automatically selected and energized. The output voltage can be regulated to a desired value under the typical operation conditions, including load change.

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Maximum efficiency tracking design of wireless power transmission system based on machine learning

et al. 2022

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Comparative Study of IPT Multi-Transmitter Coils Single-Receiver Coil System Focusing on Misalignment Tolerance and System Efficiency

Cited by 4 publications

References 9 publications

A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

A Review of Power Transfer Systems for Light Rail Vehicles: The Case for Capacitive Wireless Power Transfer

An Inverter Topology for Wireless Power Transfer System with Multiple Transmitter Coils

Maximum efficiency tracking design of wireless power transmission system based on machine learning

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