Measurement and Calculation Method of Wireless Power Transfer Coil Equivalent Series Resistance under the Vehicle

Kimura, Norihito; Yuasa, Hiroaki

doi:10.23919/epe20ecceeurope43536.2020.9215671

Cited by 1 publication

(1 citation statement)

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“…In practical implementation, the driving voltage must be reduced in order to prevent overcurrent in the primary circuit operating in resonant conditions [ 3 ]. Seeking a higher accuracy of WPT system primary side impedance estimation, it should be measured at a temperature that is reached by driving with nominal current, similarly to that reported in [ 39 ].…”

Section: A Methods For Transferred Power Measurementmentioning

confidence: 99%

A Measurement Method of Power Transferred to an Electric Vehicle Using Wireless Charging

Nakutis,

Lukočius,

Girdenis

et al. 2023

Sensors

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The increasing number of zero-emission vehicles on the roads demands novel vehicle charging solutions that ensure convenience, safety, increased charging infrastructure availability, and aesthetics. Wireless charging technology is seen as the one that could assure these desirable properties and could be applied not just in conventional implementations but also in off-grid solutions together with roadway energy harvesting systems. Both approaches require proper transfer of energy metering methods. In this paper, a method for measuring the power transferred to the load in a wireless charging system is presented, and its systematic error is assessed in the relevant range of influencing factors. The novelty of the method is that it does not require any metrologically certified measurement instrumentation on the receiver side of the wireless charging system. The error analysis is performed using a numerical simulation. Considered error-influencing factors included secondary side electrical load, coils’ coupling coefficient and quality factor, current and voltage quantization resolution, and compensation topology type (serial-serial (SS) and serial-parallel (SP)). It was determined that the systematic error of the power assessment does not exceed 0.7% for SS and 1.1% for SP topologies when the coupling coefficient is in the range of 0.05 to 0.4 and the quality factor of the resonant system is in the range of 100 to 800.

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Section: A Methods For Transferred Power Measurementmentioning

confidence: 99%