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Modeling and Characteristic Analysis of Mistuned Series–Series-Compensated Wireless Charging System for EVs
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Modeling and Characteristic Analysis of Mistuned Series–Series-Compensated Wireless Charging System for EVs
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Journal Article
Modeling and Characteristic Analysis of Mistuned Series–Series-Compensated Wireless Charging System for EVs
2025
Overview
Cumulative mistuning effects in electric vehicle wireless charging systems, arising from component tolerances, coil misalignments, and aging-induced drifts, can significantly degrade system performance. To mitigate this issue, this work establishes an analysis model for mistuned series–series-compensated wireless power transfer (WPT) systems. Through equivalent simplification of mistuned parameters, we systematically examine the effects of compensation capacitances and coil inductances on input impedance, output power, and efficiency in SS-compensated topologies across wide load ranges and different coupling coefficients. Results reveal that transmitter-side parameter deviations exert more pronounced impacts on input impedance and power gain than receiver-side variations. Remarkably, under receiver-side inductance mistuning of −20%, a significant 32° shift in the input impedance angle was observed. Experimental validation on a 500 W prototype confirms ≤5% maximum deviation between calculated and measured values for efficiency, input impedance angle, and power gain.
Publisher
MDPI AG
