System identification and tuning of wireless power transfer systems with multiple magnetically coupled resonators

• Autorzy: Winges J. , Rylander T. , Petersson C. , Ekman C. , Johansson L.-Å. , McKelvey T.

Identyfikatory

DOI

10.22149/teee.v2i2.116

• Konferencja: International Conference on Environment and Electrical Engineering (17 ; 06-09.06.2017 ; Milan, Italy)
• Języki publikacji: EN

Abstrakty

EN

We present a procedure for system identification and tuning of a wireless power transfer (WPT) system with four magnetically coupled resonators, where each resonator consists of a coil and a capacitor bank. The system-identification procedure involves three main steps: 1) individual measurement of the capacitor banks in the system; 2) measurement of the frequency-dependent two-port impedance matrix of the magnetically coupled resonators; and 3) determining the inductance of all coils and their corresponding coupling coefficients using a Bayesian approach. The Bayesian approach involves solving an optimization problem where we minimize the mismatch between the measured and simulated impedance matrix together with a penalization term that incorporates information from a direct measurement procedure of the inductance and losses of the coils. This identification procedure yields an accurate system model which we use to tune the four capacitance values to recover high system-performance and account for, e.g., manufacturing tolerances and coil displacement. For a prototype WPT system, we achieve 3.3 kW power transfer with 91% system efficiency over an air-gap distance of approximately 20 cm.

Słowa kluczowe

EN

wireless power transfer; magnetically coupled resonators; system identification; tuning; Bayesian estimation; impedance matching; charging electric vehicles

• Wydawca: EEEIC International Publishing
• Czasopismo: Transactions on Environment and Electrical Engineering
• Rocznik: 2017
• Tom: Vol. 2, No. 2
• Strony: 86--92
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Winges J.

• Department of Electrical Engineering, Chalmers University of Technology, Göteborg, 41296 Sweden

autor

Rylander T.

• Department of Electrical Engineering, Chalmers University of Technology, Göteborg, 41296 Sweden

autor

Petersson C.

• QRTECH AB, Flöjelbergsgatan 1c, Mölndal, 43135 Sweden

autor

Ekman C.

• QRTECH AB, Flöjelbergsgatan 1c, Mölndal, 43135 Sweden

autor

Johansson L.-Å.

• QRTECH AB, Flöjelbergsgatan 1c, Mölndal, 43135 Sweden

autor

McKelvey T.

• Department of Electrical Engineering, Chalmers University of Technology, Göteborg, 41296 Sweden

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).