Minimization of vias in PCB implementations of planar coils with litz-wire structure

Lope, Ignacio; Acero, J.; Serrano, J.; Carretero, C.; Alonso, R.; Burdío, J.M.

doi:10.1109/apec.2015.7104703

Cited by 14 publications

(4 citation statements)

References 15 publications

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“…However, because of the internal proximity effect among strands, the results did not have a significant improvement. A Litz style PCB winding with interleaving strands was proposed in References [17][18][19][20][21]. Because all strands were subjected to the same magnetic field strength, they were expected to carry equal currents and help to reduce AC to DC ratio better than parallel strands winding.…”

Section: Using Multi-strands and Litz Style Pcb Windings To Reduce Sk...mentioning

confidence: 99%

A Review and Comparison of Solid, Multi-Strands and Litz Style PCB Winding

Nguyen¹,

Blanchette²

2020

Electronics

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At high frequency, AC resistance of a printed circuit board (PCB) winding becomes important and accounts for a large proportion of planar transformer losses. The winding is then influenced by both skin and proximity phenomenon, which makes the current distribution uneven resulting in an increased resistance. The study of improving AC resistance of a PCB winding has been tackled by many researchers. However, the lack of an overview and comparison among improvements has made it difficult to apply those methods to a specific winding. To overcome the above limitations, this paper investigates the pros and cons of three popular AC resistance optimizing methods: optimizing track width of a solid PCB winding, using multi-strands and using Litz style PCB winding. To verify the theoretical analysis, a total of 12 PCBs are simulated by finite element (FEM) and tested in the laboratory. Five criteria are analyzed, including skin resistance, proximity resistance, AC to DC ratio, total AC resistance and complexity are taken into consideration. The results of this study show that optimizing track width method has a significant improvement on AC resistance while the use of Litz PCB is effective for applications that need stable AC resistance in a wide frequency range. The use of parallel strands winding should be carefully considered as there is not significant benefit in both reducing the AC resistance and AC to DC ratio.

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Section: Using Multi-strands and Litz Style Pcb Windings To Reduce Sk...mentioning

confidence: 99%

A Review and Comparison of Solid, Multi-Strands and Litz Style PCB Winding

Nguyen¹,

Blanchette²

2020

Electronics

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“…In [13], this issue was addressed by providing more transposition points along the entire conductor path. Authors in [17] mentioned high manufacturing cost and low reliability as two main drawbacks of using more transposition points in planar inductors. Accordingly, using the filed profile of the planar windings, the minimization of the number of transposition points without significant reduction of performance was discussed.…”

Section: Introductionmentioning

confidence: 99%

Design and Assessment of Track Structures in High-Frequency Planar Inductors

Kolahian,

Zarei Tazehkand,

Baghdadi

2024

Energies

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This paper investigates the effect of different designs and arrangements of conductors on the operational parameters of a planar inductor. Accordingly, it is suggested that there is no one-size-fits-all design that can achieve all desired parameters in every application, and the best design should be determined by the needs of the application. In order to have a comprehensive study, four different structures are considered and compared. Numerous design parameters such as track width, track length, location of the conductors between the central limb and the lateral limb, and number of transposition points among subtracks for both air-core and ferrite-core inductors are considered. Each structure is evaluated according to AC resistance, RAC/RDC, and inductance. Measurement results reveal that it is critical to take into account all three characteristics when deciding the suitable structure for the conductors. Studies are carried out based on measurement results for experimental prototypes in the frequency range of 10 Hz–1 MHz, and a set of guidelines is provided with regard to the design of planar inductors to achieve desired characteristics.

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“…In [11] this issue is addressed by providing more transposition points along the entire conductor path. Authors in [15], have mentioned high manufacturing cost and low reliability as two main drawbacks of using more transposition points in planar inductors. Accordingly, using the filed profile of the planar windings, the minimization of the number of transposition points without significant reduction of performance is discussed.…”

Section: Introductionmentioning

confidence: 99%

Design and Assessment of Track Structures in High-Frequency Planar Inductors

Kolahian¹,

Tazehkand²,

Baghdadi³

2022

Preprint

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<p> This paper provides a practical guideline for conductor arrangement in a planar inductor by investigating various arrangements for conductors. In order to have a comprehensive study, four different structures have been considered and compared. Numerous design parameters such as track width, track length, location of the conductors between the central limb and the lateral limb, and number of transposition points among sub-tracks for both air-core and ferrite-core inductors are considered. Each structure is evaluated according to AC resistance, RAC /RDC, and inductance. Measurement results reveal that it is critical to take into account all three characteristics when deciding the suitable structure for the conductors. Studies are carried out based on measurement results for experimental prototypes in the frequency range of 10Hz-1MHz and a set of guidelines has been provided with regard to the design of planar inductors to achieve desired characteristics. </p>

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Minimization of vias in PCB implementations of planar coils with litz-wire structure

Cited by 14 publications

References 15 publications

A Review and Comparison of Solid, Multi-Strands and Litz Style PCB Winding

A Review and Comparison of Solid, Multi-Strands and Litz Style PCB Winding

Design and Assessment of Track Structures in High-Frequency Planar Inductors

Design and Assessment of Track Structures in High-Frequency Planar Inductors

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