Comparison between numerical and analytical methods of AC resistance evaluation for Medium Frequency Transformers: Validation on a prototype

Pereira, Albert; Lefebvre, Bruno; Sixdenier, Fabien; Raulet, Marie–Ange; Burais, Noël

doi:10.1109/epec.2015.7379938

Cited by 11 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The details of the transformer design are given in [17]. Because of the short development time, the magnetic material is chosen a priori: among the possible candidates [18], ferrite is selected because of its availability, despite its low maximum induction level (≈ 0.2 T).…”

Section: Transformer Designmentioning

confidence: 99%

“…The copper losses in the winding are estimated using Dowell's equations [19]. These equations consider the current harmonics and estimate the AC resistance of the winding taking into account proximity and skin effects in the conductors [17]. Foil winding is preferred because of its lower cost, lower AC resistance compared to wire, and because it is well suited to the small number of turns being considered here (2 windings with 14 turns per column).…”

Section: Analytical Designmentioning

confidence: 99%

See 1 more Smart Citation

How Good are the Design Tools in Power Electronics?

Lagier¹,

Dworakowski²,

Chédot³

et al. 2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

View full text Add to dashboard Cite

show abstract

Section: Transformer Designmentioning

confidence: 99%

Section: Analytical Designmentioning

confidence: 99%

How Good are the Design Tools in Power Electronics?

Lagier¹,

Dworakowski²,

Chédot³

et al. 2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

View full text Add to dashboard Cite

show abstract

“…It was connected to the metal support of the MFT, itself connected to the ground of the DC-DC converter. The goal was to reduce the parasitic capacitance between the primary and the secondary and to 6 5 6 5 More details on the differences between the measurement and the calculations are given in [11].…”

Section: Medium Frequency Transformer 1) Main Characteristicsmentioning

confidence: 99%

“…In those conditions, the "hot-spot" measurements levels were ~ 55 °C on the coils and ~ 40 °C on the magnetic circuit. The measurements were compared with the calculation results including two methods of calculating the copper losses: magnetic 3D on the one hand and analytic (Dowel [13]) on the other hand [11].…”

Section: ) Thermal Measurementsmentioning

confidence: 99%

A 100 kW 1.2 kV 20 kHz DC-DC converter prototype based on the Dual Active Bridge topology

Lagier¹,

Chédot²,

Ghossein³

et al. 2018

2018 IEEE International Conference on Industrial Technology (ICIT)

View full text Add to dashboard Cite

This article presents the design, the fabrication, and the test of an isolated DC-DC converter for renewable energy applications. The converter is based on the Dual Active Bridge topology and uses silicon carbide power semiconductors and a medium frequency transformer. The design process covers hardware ranging from the semiconductor die to the complete power converter. For the control, a rapid prototyping approach was used. The experimental validation of the 100 kW prototype is presented.

show abstract

“…The controlled heat transfer mechanism in the mini and millimeter channels is thought to be the evaporation of the thin liquid film around the bubbles in the micro-channels (Chen, et al, 2013;Mersen, 2017). There are several general literature reviews of one-dimensional and two-dimensional FC-72 flow boiling and heat transfer, depending on channel geometry (Pereira et al, 2017;Ansys, 2017;Kivisalu et al, 2014;Naik, et al2014).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Annular Flow boiling in Millimeter-scale Channels and Investigation of Design Parameters Using Taguchi Method

Koca

Khalaji

2019

Bilge International Journal of Science and Technology Research

View full text Add to dashboard Cite

As the technology progresses, the electronic components become smaller and at the same time continue to produce more heat, and therefore development of new high heat-flux cooling technologies have become obligatory. The mini and millimeter-scale phase change cooling systems, which have a reduced size and a large surface area where heat transfer can take place, have become an integral part of advanced cooling systems. When comparing phase-change cooling systems with other cooling systems, a relatively low flow rate of very high evaporation heat, which is associated with the phase change for most fluids, allows large amounts of heat to dissipate with flow boiling and substantially solves the many problems. The two-phase cooling technologies used for critical applications include; heat pipes, loop heat pipes and capillary pumped loops which are all passive hence very reliable solutions relying on only capillary effects. Though this passive device cannot meet future high cooling demands because of the limitations of the capillary pumping in terms of heat flux, transport distance and multiple heat source capabilities. On the other hand, in boiling and condensing flows functionality problems arise since at the micrometer and millimeter-scale, shear/pressure forces dominate over gravitational forces and cause thermally hydro-dynamically ineffective/problematic liquid-vapor configurationssuch as plug/slugs flow regimes. For this reason, to overcome the requirement of large amounts of heat transfer from limited spaces and resolving the above problem, novel millimeter-scale phase-change devices should be developed. In this study, for the design of millimeter-scale boilers a 3D Ansys-Fluent© simulation model was developed and numerical simulations were conducted for two different cooling fluids (water and FC-72), different mass flow rates and two different channel heights. Moreover, to examine the simulation results Taguchi method was used. In order to realize thin film annular flow over the boiler surface, employed specific boundary conditions in the 3D simulation model were obtained by means of one dimensional Matlab© simulation code. By means of utilizing the evaluated numerical results, distribution of heat transfer coefficient, vapor quality and pressure drop over the heat transfer surfaces were reported.

show abstract

Comparison between numerical and analytical methods of AC resistance evaluation for Medium Frequency Transformers: Validation on a prototype

Cited by 11 publications

References 13 publications

How Good are the Design Tools in Power Electronics?

How Good are the Design Tools in Power Electronics?

A 100 kW 1.2 kV 20 kHz DC-DC converter prototype based on the Dual Active Bridge topology

Numerical Simulation of Annular Flow boiling in Millimeter-scale Channels and Investigation of Design Parameters Using Taguchi Method

Contact Info

Product

Resources

About