AC Resistance of Copper Clad Aluminum Wires

Guan, Ning; Kamidaki, Chihiro; Shinmoto, Takashi; Yashiro, K.

doi:10.1587/transcom.e96.b.2462

Cited by 7 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among all the products available on the industrial market, Copper Clad Aluminum (CCA) wires are the most popular. They are produced at the industrial scale and widely used for conductors working with high frequency signals [9][10][11][12][13][14]. The architecture of CCA wires is relatively simple since they typically exhibit an Al core covered by a Cu skin (typically less than 50m).…”

Section: Introductionmentioning

confidence: 99%

“…Practically, in annealed CCA wires only three IMC are often observed (Al2Cu, AlCu and Al4Cu9) [13,[19][20][21], but it should be noted that in few cases other configurations have been reported involving Al3Cu4 [7][8][9][10][11], Al2Cu3 [22], or the absence of AlCu [22,23]. In any case, the reaction is governed by bulk diffusion and the energy of formation for the growth of the most common IMC are 117 kJ/mol, 107 kJ/mol and 90 kJ/mol for Al2Cu, Al4Cu9 and AlCu, respectively [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the early stage of reactive interdiffusion in the Cu-Al system by in-situ transmission electron microscopy

2020

View full text Add to dashboard Cite

The early stage of the reactive interdiffusion in the Cu-Al system was investigated at 350°C and 300°C thanks to in-situ transmission electron microscopy. A special care was given to find conditions where the electron beam and the sample free surface do not affect significantly the reaction. A special emphasis was then given on the influence of grain boundaries that are fast diffusion paths, and on nanoscaled particles that may interact with the transformation front. It was found that there is a transient state followed by a steady state where the mean growth rates of intermetallic compounds follow a parabolic law indicating that the kinetics is diffusion controlled. Thanks to the in-situ observations at the nanoscale, it was also possible to track the local velocity of interfaces between the different phases. Strong fluctuations were exhibited within length scales smaller than 100nm and they are partly attributed to interface pinning by nanoscaled particles. Last, considering thermodynamic and kinetic arguments, it is shown that it is mainly an indirect effect induced by a local change of solute fluxes and of concentration gradients.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the early stage of reactive interdiffusion in the Cu-Al system by in-situ transmission electron microscopy

2020

View full text Add to dashboard Cite

show abstract

“…Apart from this pioneering analysis, aluminum litz-wire works have rarely been contributed to the literature, and exceptions are circumscribed to some conference communications [29]- [33]. A similar situation is observed with CCA litz wires [34] whose use for EVs chargers has been recently reported [35].…”

Section: Introductionmentioning

confidence: 91%

Comparative Evaluation of Different Cables for Magnetic Couplers in Inductive Power Transfer Systems

Acero,

Lope,

Carretero

et al. 2024

IEEE Trans. on Ind. Applicat.

View full text Add to dashboard Cite

Copper litz wires are widely used in wireless charging stations of light-duty electric vehicles. This type of cable is specifically mentioned in the SAE J2954 standard. However, details as the number and diameter of strands, or the material of conductors are not mentioned in the standard, which makes room to address some research and innovations. In this work, several alternatives to the traditional copper-litz wires are analyzed. Specifically, aluminum litz wire, copper-clad aluminum litz wire, and copper tubes are considered as alternatives to standard litz wire for the mentioned application. Potential benefits of the considered alternatives could include weight and cost savings. However, these advantages could not be enough to justify a wiring change if the resistance of the power pads increases and, equivalently, the efficiency of the electromagnetic power transfer decreases. For this reason, a model of the parasitic resistance of windings is proposed by combining the analytical ac resistance of two-layered round strands and finite element simulations. This model is used to obtain a figure of merit related with the efficiency of the electromagnetic energy transfer which is used to compare the different cables. Apart from efficiency, thermal behavior, cost and weight are also considered for comparison purposes. As a result, some conclusions about the suitability of each cable with respect to the operating frequency range are extracted.

show abstract

“…8 [14]. The sum of the external magnetic intensities H e (w i ) across one winding w i is calculated as (8) and the total resistance R copper due to the copper loss is expressed as (9).…”

Section: Copper Lossmentioning

confidence: 99%

Practical Bifurcation Criteria considering Inductive Power Pad Losses in Wireless Power Transfer Systems

Kim¹,

Lee²,

Lee³

2017

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

In this paper, the bifurcation criteria for inductive power transfer (IPT) systems is suggested considering the inductive power pad losses. The bifurcation criteria for series-series (SS) and series-parallel (SP) topologies are derived in terms of the main parameters of the IPT system. For deriving precise criteria, power pad resistance is obtained by copper loss calculation and core loss analysis. Utilizing the suggested criteria, possibility of bifurcation occurrence can be predicted in the design process. In order to verify the proposed criteria, 50 W IPT laboratory prototype is fabricated and the feasibilities of the switching frequency and AC load resistance shift to escape from bifurcation are identified.

show abstract

AC Resistance of Copper Clad Aluminum Wires

Cited by 7 publications

References 8 publications

Investigation of the early stage of reactive interdiffusion in the Cu-Al system by in-situ transmission electron microscopy

Investigation of the early stage of reactive interdiffusion in the Cu-Al system by in-situ transmission electron microscopy

Comparative Evaluation of Different Cables for Magnetic Couplers in Inductive Power Transfer Systems

Practical Bifurcation Criteria considering Inductive Power Pad Losses in Wireless Power Transfer Systems

Contact Info

Product

Resources

About