Optimal Finite Element Modelling and 3-D Parametric Analysis of Strong Coupled Resonant Coils for Bidirectional Wireless Power Transfer

Olukotun, Babatunde; Partridge, Julius; Bucknall, Rwg

doi:10.1109/upec.2018.8541867

Cited by 5 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, it appeared that the ratio l M could be chosen as a criterion to verify for a given type of wire, the coil of which leads to the maximum transmission efficiency. According to Equation (12), the maximum transmission efficiency increases with smaller l M . Table 5 shows the nominal mutual inductance M, the nominal ratio l M , and the maximum transmission efficiency η max for the different coupling coils (the nominal position defined in Section 3.1).…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…The performances of coupling systems were evaluated and compared for various air gaps and lateral misalignments, but the work did not reveal which factor had the greater influence on the efficiency. In [12], parametric performance evaluations of circular, rectangular, and double-sided winding resonant coils were taken into account separately using finite element modeling (FEM) and comprising air gap variation and longitudinal and lateral misalignment. In [13], circular coils were designed and investigated for planar and angular misalignment through the FEM model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of Coupling Coils for Static Inductive Power-Transfer Systems Taking into Account Sources of Uncertainty

et al. 2021

View full text Add to dashboard Cite

The present work aims at comparing different coupling coils by taking into account sources of uncertainty for static inductive power-transfer (SIPT) systems. Due to the maximum transmission efficiency for the SIPT system related to the mutual inductance between coils, the key point here is to make use of a sparse polynomial chaos expansion (PCE) method to analyze the mutual inductance between the transmitter and the receiver. A fast postprocess-sensitivity analysis allowed the identification of which source of uncertainty was the most influential factor to the mutual inductance for different coupling coils. Furthermore, in view of the relationship between the maximum transmission efficiency and the ratio of the length of wires of a coil and the mutual inductance, circular coupling coils should be recommended for SIPT systems.

show abstract

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Coupling Coils for Static Inductive Power-Transfer Systems Taking into Account Sources of Uncertainty

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Based on the parameter specification of each of the resonant coil models shown in Table 1, appropriate designs for each model was built in the Ansys Electronic Desktop environment, as illustrated in Figure 3. The specification of coil turns for the flux-pipe model was based on the works of B. Olukotun et al [23]. It was noted that increasing the number of coil turns of flux-pipe resonant coil using a fixed length of litz wire increases the level of magnetic coupling.…”

Section: Optimal Finite Element Modeling Of Flux-pipe Resonant Coil Tmentioning

confidence: 99%

Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

2019

Self Cite

View full text Add to dashboard Cite

This paper presents the optimal modeling and finite element analysis of strong-coupled, high-power and low-loss flux-pipe resonant coils for bidirectional wireless power transfer (WPT), applicable to electric vehicles (EVs) using series-series compensation topology. The initial design involves the modeling of strong-coupled flux-pipe coils with a fixed number of wire-turns. The ohmic and core loss reduction for the optimized coil model was implemented by creating two separate coils that are electrically parallel but magnetically coupled in order to achieve maximum flux linkage between the secondary and primary coils. Reduction in the magnitude of eddy current losses was realized by design modification of the ferrite core geometry and optimized selection of shielding material. The ferrite core geometry was modified to create a C-shape that enabled the boosting and linkage of useful magnetic flux. In addition, an alternative copper shielding methodology was selected with the advantage of having fewer eddy current power losses per unit mass when compared with aluminum of the same physical dimension. From the simulation results obtained, the proposed flux-pipe model offers higher coil-to-coil efficiency and a significant increase in power level when compared with equivalent circular, rectangular and traditional flux-pipe models over a range of load resistance. The proposed model design is capable of transferring over 11 kW of power across an airgap of 200 mm with a coil-to-coil efficiency of over 99% at a load resistance of 60 Ω.

show abstract

“…In the research work of Babatunde .O. et al [19], it was noted that for a fixed length of litz wire, an increase in the number of coils turns increases the level of magnetic coupling between the primary and secondary coils. In this research paper, a finite element modelling and analysis was employed to ascertain the impact of coil turns on the losses, power output and power transfer efficiency of fluxpipe resonant coils.…”

Section: Introductionmentioning

confidence: 99%

Impact of Coil Turns on Losses, Output power and Efficiency Performance of Flux-Pipe Resonant Coils

Olukotun

Partridge

Bucknall

2019

2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe)

Self Cite

View full text Add to dashboard Cite

This paper presents a finite element analysis of five different sizes of flux-pipe resonant coil design with a different number of coils turns but having the identical length of litz copper wire and aluminum shield. The analysis was undertaken to establish the impact of coil turns on the losses, magnetic flux distribution, power output, and power transfer efficiency of fluxpipe resonant coils. From the result presented, it was noted at a constant frequency, an increase in the excitation current causes a significant increase in the ohmic, core, and eddy current losses for each of the coil model designs. Similarly, at constant excitation current, it was observed that the eddy current losses increase significantly with an increase in resonant frequency. In contrast, the ohmic and core losses are relatively constant over the range of resonant frequencies used in the analysis. It was also noted that term k√Qps (where k is the coupling coefficient and Qps is the product of the quality factor of the primary and secondary coils) has a significant influence on the input power, output power and coil-to-coil efficiency of a particular flux-pipe resonant coil design. Increasing the value of k√Qps increases the value of output power, input power and coilto-coil efficiency. Similarly, the lower the coupling coefficient, the higher the required optimum resonant frequency for optimum coil-to-coil efficiency and output power.

show abstract

Optimal Finite Element Modelling and 3-D Parametric Analysis of Strong Coupled Resonant Coils for Bidirectional Wireless Power Transfer

Cited by 5 publications

References 8 publications

Comparison of Coupling Coils for Static Inductive Power-Transfer Systems Taking into Account Sources of Uncertainty

Comparison of Coupling Coils for Static Inductive Power-Transfer Systems Taking into Account Sources of Uncertainty

Finite Element Modeling and Analysis of High Power, Low-loss Flux-Pipe Resonant Coils for Static Bidirectional Wireless Power Transfer

Impact of Coil Turns on Losses, Output power and Efficiency Performance of Flux-Pipe Resonant Coils

Contact Info

Product

Resources

About