Modeling of Mutual Inductance Between Superconducting Pancake Coils Used in Wireless Power Transfer (WPT) Systems

Shi, Zhijun; Chen, Xiao Yuan; Qiu, Zhong Cai

doi:10.1109/tasc.2019.2891682

Cited by 20 publications

(14 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various analytical models and calculation methods for the mutual inductance between two coils are presented in existing works [32]- [34]. Ferrite cores and aluminum plates are commonly used in practical wireless charging systems, but there is little research on mutual inductance modeling that considers these factors.…”

Section: A Mutual Inductance Modelingmentioning

confidence: 99%

Vision-Based Rapid Power Control for a Dynamic Wireless Power Transfer System of Electric Vehicles

et al. 2020

View full text Add to dashboard Cite

Dynamic wireless power transfer brings a refreshing way for charging electric vehicles (EVs) in motion, which can help reduce the amount and bulk of onboard batteries and prolong the vehicle mileage. However, the misalignment between the transmitter coil and receiver coil varies randomly as the vehicle moves, reducing the stability of the output power and the system efficiency. Therefore, a guiding approach is imperative to maintain the coil alignment within an acceptable range. In this paper, a visionbased misalignment detection method is proposed to improve the stability of the system output power and the efficiency. First, the relationships among the system efficiency, output power and mutual inductance were derived in theory. Second, the relationship between the mutual inductance and the misalignment was modeled and simulated using ANSYS Maxwell software. Third, image detection of the ground guideline was used to locate the transmitter coil, and thus obtain the accurate misalignments online. Based on the acquired misalignments, the output power can be rapidly and precisely regulated to the desired value. Finally, the experimental results show that the proposed method can accurately acquire the coil misalignments and then rapidly regulate the system output power in comparison with the conventional discrete proportional-integral control algorithm.

show abstract

Section: A Mutual Inductance Modelingmentioning

confidence: 99%

Vision-Based Rapid Power Control for a Dynamic Wireless Power Transfer System of Electric Vehicles

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The analytical method has remarkable advantages over the other methods due to its time-saving analysis and cost effectiveness. Though many studies have been carried out to compute self-and mutual inductances of WPT system coils for circular [8][9][10][11] and square structures [12][13][14], few studies have been published regarding rectangular [15,16] and DD power coils [17]. An analytical method to compute self-and mutual inductances of spiral rectangular coils is presented in [18].…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of Self- and Mutual Inductances of DD Coils in Wireless Power Transfer Applications

Alkasir

Abdollahi

et al. 2022

J Electromagn Eng Sci

View full text Add to dashboard Cite

Self- and mutual inductances are major design parameters for wireless power transfer (WPT) systems. To optimize a WPT system and estimate its performance in terms of received power and efficiency, it is essential to obtain a simple, fast, and accurate calculation of these two parameters. The polarized double-D (DD) coils were selected due to their simplicity of structure, high efficiency, and low sensitivity to misalignment conditions. This paper presents analytical calculations of self- and mutual inductance using the Biot-Savart law for DD coils. The results of the analytical calculations of mutual inductance in different distances between coils were investigated, and the results of the calculations were verified using experimental and finite element method (FEM) simulation results. This paper also presents analytical and FEM-based optimization guidelines for the coupling coefficient of the transmitter coil.

show abstract

“…As mentioned before, the MCR-WPT system employing traditional linear resonators is vulnerable to frequency misalignment and working frequency drift. Several methods have been reported to enhance the stability of output voltage in the case of high efficiency operation such as frequency tracking [7], [11], load impedance matching [12], [13], resonator impedance matching [14], [15] and coupling manipulation [16], [17]. It has been shown that the resonance can be maintained with the above theories.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Enhancement for Wireless Power Transfer System Employing Non-Linear Resonator

Jiao

Fan

et al. 2021

IEEE Access

View full text Add to dashboard Cite

In order to enhance the tolerance of frequency misalignment and solve the amplitudebandwidth limitation issue of the traditional linear resonance wireless power transfer (WPT) system, this paper proposes a non-linear resonance WPT (NLR-WPT) system which is mainly composed of high frequency power supply, primary linear resonator, secondary non-linear resonator, and load. Such non-linear resonator can be implemented with passive linear capacitor and magnetic saturation inductor, and it can be described by Duffing equation. It has been shown that the bandwidth of NLR-WPT system in the nonlinear state is 1.7 times larger than that in the linear state. In addition, the output voltage basically stabilizes at the same level, the voltage fluctuation is less than 5% over the power frequency ranging from 25.6 kHz to 31.8 kHz, and high overall efficiency of 86.5% can be achieved under a wide range of frequency (27.5 kHz-30.1 kHz). Furthermore, the range of frequency can be extended significantly over which the output voltage is maintained even while the compensate capacitance, load, or coupling coefficient values vary in a certain range. The experimental results agree well with the theoretical analysis and verify the validity of the NLR-WPT system with non-linear resonator. This paper provides a simple and effective scheme to suppress the fluctuation of output voltage, which is suitable for the applications of constant voltage charging such as moving devices or electric vehicles.INDEX TERMS Wireless power transfer (WPT), bandwidth enhancement, stable output voltage, non-linear resonance, magnetic saturation inductor, Duffing equation.

show abstract

Modeling of Mutual Inductance Between Superconducting Pancake Coils Used in Wireless Power Transfer (WPT) Systems

Cited by 20 publications

References 10 publications

Vision-Based Rapid Power Control for a Dynamic Wireless Power Transfer System of Electric Vehicles

Vision-Based Rapid Power Control for a Dynamic Wireless Power Transfer System of Electric Vehicles

Analytical Modeling of Self- and Mutual Inductances of DD Coils in Wireless Power Transfer Applications

Bandwidth Enhancement for Wireless Power Transfer System Employing Non-Linear Resonator

Contact Info

Product

Resources

About