Magnetic behaviour of GOES wound cores of transformers fed by square or sine voltages

Roger, Daniel; Rossi, Mathieu; Ichou, Houssam; Blaszkowski, Jonathan

doi:10.1016/j.jmmm.2022.170032

Cited by 2 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first step was to define the field of application of such cores before ferrite and nanocrystalline materials were explicitly developed for high-frequency transformers. Initial studies showed that it was interesting to raise the core temperature of GOES, as the magnetic properties of GOES are maintained up to 500 • C. Higher temperatures correspond to lower losses [12]. The analytical study also proves that in GOES cores at medium frequencies, core losses are lower for rectangular voltages than sinusoidal voltages [11].…”

Section: Introductionmentioning

confidence: 80%

Selection of the Winding Type of Solid-State Transformers in Terms of Transmitting the Greatest Possible Power in the Frequency Range from 500 Hz to 6000 Hz

Lesniewska,

Roger

2023

Energies

Self Cite

View full text Add to dashboard Cite

Solid-state transformer (SST) is an emerging technology that integrates with transformer power electronics converters and control. The most noticeable advantages of SST are the size and weight reduction compared with low-frequency transformers. Since this device is used in many devices such as smart grids, traction systems, systems with renewable energy sources (RESs) and electric vehicle charging devices, it is important to build a high-efficiency device at a low cost. The article evaluates a medium frequency transformer (SST) operating at a frequency of 500 Hz to 6000 Hz with coils wound with aluminum foil or Litz windings and of a grain-oriented electrical steel (GOES) core. The calculations were made using the 3D field method using the numerical finite element method, and the results were compared with the tests of the real model. The measurement method based on the Fourier analysis of real signals was used for the research.

show abstract

Section: Introductionmentioning

confidence: 80%

Selection of the Winding Type of Solid-State Transformers in Terms of Transmitting the Greatest Possible Power in the Frequency Range from 500 Hz to 6000 Hz

Lesniewska,

Roger

2023

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

Design of coils for high-power medium-frequency transformers using Grain-Oriented hot cores

Roger,

Rossi,

Komeza

et al. 2024

JAE

Self Cite

View full text Add to dashboard Cite

This article proposes a design of windings for medium-frequency transformers (MFTs) at the heart of high-power Solid-State Transformers (SSTs). With aluminum interleaved foils of the correct thicknesses, it is possible to obtain low winding losses and a very low leakage inductance well adapted to high-power SSTs able to operate in the medium-voltage grid (5–20 kV). The MFT equivalent resistance and leakage inductance are determined using an analytical model based on Dowell’s hypotheses. Several interleaved winding configurations are analyzed and compared to the standard structure made of two concentric foil coils. The experimental validation is made with short-circuit tests of an MFT fed by a low-level square voltage source at several kHz, which can provide the necessary high current.

show abstract

Magnetic behaviour of GOES wound cores of transformers fed by square or sine voltages

Cited by 2 publications

References 10 publications

Selection of the Winding Type of Solid-State Transformers in Terms of Transmitting the Greatest Possible Power in the Frequency Range from 500 Hz to 6000 Hz

Selection of the Winding Type of Solid-State Transformers in Terms of Transmitting the Greatest Possible Power in the Frequency Range from 500 Hz to 6000 Hz

Design of coils for high-power medium-frequency transformers using Grain-Oriented hot cores

Contact Info

Product

Resources

About