Wideband Low-Frequency Design of Inductors and Wireless Power Transfer Coils Using the Mixed Finite-Element Time-Domain Method

Xin, Lü; Chen, Ke; Wang, Lixiao; Xue-jun, Wang; Liu, Qing

doi:10.1109/lmwc.2020.2998797

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Finally, it is important to clearly state that Cheng et al [19], first looked into and developed mFETD method. The novelty of our work as against/compared with [19], [20] is that this paper demonstrates why the mFETD is not efficient at solving the problem of coaxial cable, under the circumstance of higher computation time and iteration as traditional FETD method. This is the major gap filled in our work.…”

Section: Introductionmentioning

confidence: 99%

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

Althuwayb

2022

IEEE Access

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This paper developed an improved numerical methods for calculating electromagnetic field at low frequencies, and compared the performance with the traditional method. Traditional finite-element time-domain (FETD) is known to suffer from low frequency breakdown (LFB) problem, where system matrix becomes ill-conditioned, and leads to instability of small size electrical structures. In this paper, we proposed a mixed FETD (mFETD) method in resolving the LFB anomaly in the traditional FEM, with a particular reference to transmission line, inductor, and coaxial cable. We considered wave equation of E-field with incorporation of divergence constraint equation (DCE) as a function of Lagrange multiplier using current continuity equation (CCE) and Gauss's law. For spatial discretization, both nodal basis functions and Curl conforming vector basis functions were selected, and we employed implicit Newmark beta algorithm (NBA) for integration of time. We describe how the components constructed via DCE in system matrix mitigate the singularity impact of the stiffness matrix, which consequently led to significant improvement of the system matrix. Numerical experiment and results demonstrate how the mFETD obtains stable numerical solution and attains faster rate of convergence while using an iterative solver, as such, improves the computational efficiency. Therefore, the mFETD method handles the transient problems in transmission line, which causes LFB anomaly in the traditional FETD, but not efficient in terms of computational time and iteration at solving the coaxial cable problem.INDEX TERMS Low frequency breakdown, traditional FETD, improved FETD, coaxial cable, divergence constraint equation, Newmark beta algorithm.

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Section: Introductionmentioning

confidence: 99%

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

Althuwayb

2022

IEEE Access

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“…Hence, the direct linkage flux for every single phase does not suffer from flux leakage due to the other phases. A finalized simulation model [38][39][40][41][42][43], more realistic in modeling the aluminum shield and adding the ferrites, is faced later with the purpose of reaching a final tuned design.…”

mentioning

confidence: 99%

Modelling and Design of a Coils Structure for 100 kW Three-Phase Inductive Power Transfer System

Colussi

Guglielmi

2022

Energies

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This paper presents the modeling, the design and verification of a three-phase coil structure for high-power Wireless-Power-Transfer (WPT) in automotive applications. The system, a Three-Polar-Pad (TPP), with complex mechanical geometry, is analytically modeled with an equivalent simplified structure. Thanks to this simplification, a numerical design is performed to minimize cross-coupling effects among different phases of the same side (receiver or transmitter) maximizing the linkage flux receiver-to-transmitter and then the power transferred. The analytical model is then verified in a Finite-Element-Analysis (FEA) environment. A final design, comprehensive of the shielding, is proposed matching the preliminary design constraints. Hence, the preliminary model is verified by testing a prototype using a three-phase Silicon Carbide (SiC) inverter at the transmitter side. The capability of the system is demonstrated by transferring 100 kW with more than 94% DC-to-DC efficiency over a 50 mm air gap in perfectly aligned conditions.

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High Voltage Inductor Design for Synthetic Testing of a Supercritical CO₂ Circuit Breaker

Hossain

Jin

et al. 2023

2023 IEEE Electrical Insulation Conference (EIC)

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Wideband Low-Frequency Design of Inductors and Wireless Power Transfer Coils Using the Mixed Finite-Element Time-Domain Method

Cited by 7 publications

References 13 publications

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

Modelling and Design of a Coils Structure for 100 kW Three-Phase Inductive Power Transfer System

High Voltage Inductor Design for Synthetic Testing of a Supercritical CO₂ Circuit Breaker

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Wideband Low-Frequency Design of Inductors and Wireless Power Transfer Coils Using the Mixed Finite-Element Time-Domain Method

Cited by 7 publications

References 13 publications

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

The Dilemma of Resolving the Low-Frequency Breakdown Problem in Microwave Components via Traditional and Improved Finite-Element Time-Domain Techniques

Modelling and Design of a Coils Structure for 100 kW Three-Phase Inductive Power Transfer System

High Voltage Inductor Design for Synthetic Testing of a Supercritical CO2 Circuit Breaker

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High Voltage Inductor Design for Synthetic Testing of a Supercritical CO₂ Circuit Breaker