Reducing the Alternating Current Resistance and Heat Generation in a <scp>Single‐Wire</scp> Coil Using a Magnetic Tape

Sato, Masaru; Sugimoto, Kaito; Kubota, Kazuo; Endo, S.; Matsumoto, Tsutomu

doi:10.1002/tee.23224

Cited by 11 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the saturation magnetic flux density and magnetic permeability can be easily adjusted by simply changing the material and compounding ratio of the magnetic composite material. Furthermore, no pressurizing process, such as a dust core, is required for manufacturing, allowing for the low-cost formation of a flexible structure (bulk or sheet) [38]- [40], [45].…”

Section: B Magnetic Composite Materials Characteristicsmentioning

confidence: 99%

Expansion of Motor High-Efficiency Area by Inserting Magnetic Composite Material into Rotor

et al. 2023

Self Cite

View full text Add to dashboard Cite

Variable magnetic flux motors have been proposed to achieve high-efficiency operation over a wide drive range ranging from high torque to high-speed. This paper clarifies the high efficiency area expansion effect of a variable flux motor with a magnetic composite material inserted in the rotor. To achieve the effect of enlarging the maximum efficiency range, this motor uses magnetic composite materials with much lower saturation magnetic flux density and iron loss than electromagnetic steel plate. This paper reports the magnetic and mechanical properties of the magnetic composite material using Fe-Si-Al alloy, considering low iron loss. The simulation results clarified the variable magnetic flux characteristics for reducing loss at high-speed rotation by actively utilizing the magnetic saturation region of the magnetic composite material. The efficiency improvement in the high-speed region is attributed to the suppression of spatial harmonics without significantly reducing the q-axis inductance. Furthermore, the proposed motor achieves both the expansion of the high-efficiency range and relaxation of mechanical stress by increasing the thickness of the bridge part adjacent to the permanent magnet.

show abstract

Section: B Magnetic Composite Materials Characteristicsmentioning

confidence: 99%

Expansion of Motor High-Efficiency Area by Inserting Magnetic Composite Material into Rotor

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…The complex permeability real part μ ′ and complex permeability imaginary part μ ″ are 10.3 and 0.044, respectively, at f = 85 kHz. The complex magnetic permeability does not change significantly from low frequencies to frequencies above 100 kHz [20]. The magnetic composite material has low iron loss because the magnetic powder is dispersed in the silicone of the insulator.…”

Section: Magnetic Flux Path Control Technologymentioning

confidence: 99%

Effectiveness of Magnetic Composite Material on Copper Loss Reductions and Misalignment in Copper‐Plate‐Coils for Wireless Power Transmission

Sato

Endo

et al. 2021

IEEJ Transactions Elec Engng

Self Cite

View full text Add to dashboard Cite

Wireless power transmission systems are suitable for use in charging systems for plug‐in hybrid vehicles and electric vehicles, particularly when considering safety and convenience. Wireless power transmission coils are made of litz copper wire to reduce copper losses at high frequencies. However, litz wires are expensive owing to their complicated structure and large number of manufacturing steps. Herein, a copper‐plate‐coil is proposed that can be manufactured at a low cost is proposed. A magnetic flux path control technique is also proposed to reduce copper losses. The use of a magnetic composite material for realizing magnetic flux path control technology reduces the alternative current resistance by 50%. In addition, this study reports the effects of the magnetic composite material on coupling coefficients observed during coil misalignment. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

show abstract

“…It is known to us that the skin effect and the proximity effect should be considered in the process of the eddy‐current losses computation [16]. Authors in [17] discussed the current density in the different positions of bars and established a ladder network in slots representing subconductors.…”

Section: Introductionmentioning

confidence: 99%

Calculation and Decrease of Zigzag Leakage Flux Losses in a Wet Submersible Induction Machine by the Virtual Permanent Magnet Harmonic Machine Model

Yan

Bao

2022

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

The accurate estimation of the zigzag leakage flux losses (ZZLFL) caused by the slot harmonics and their interactions, which occupy a high proportion of stray losses, are of great significance in the efficiency calculation as well as the optimization design for the wet submersible induction machine (WSIM). In this paper, a two-dimensional finite element method (FEM) is presented to separate ZZLFL into the iron losses and the eddy-current losses. The air-gap magnetic flux density is decomposed by the two-dimensional fast Fourier transform at a sampling frequency of 5000 Hz. The hybrid excited virtual permanent magnet harmonic machine model is applied to reconstruct the air-gap magnetic field and excite the stator and rotor separately. Each node harmonic iron losses are acquired through the modified Bertotti iron losses model with the consideration of high-frequency power losses as a function of the magnetic flux density. The zigzag flux losses provided by different harmonics are obtained by subtracting the hybrid excitation losses. According to the different proportions of harmonic losses among zigzag flux losses, novel WSIM models are proposed in the paper to decrease zigzag flux losses and increase the efficiency. Adopting the same computation process, the novel models with different structures are explored and verified to improve the zigzag flux losses and power density.

show abstract

Reducing the Alternating Current Resistance and Heat Generation in a Single‐Wire Coil Using a Magnetic Tape

Cited by 11 publications

References 17 publications

Expansion of Motor High-Efficiency Area by Inserting Magnetic Composite Material into Rotor

Expansion of Motor High-Efficiency Area by Inserting Magnetic Composite Material into Rotor

Effectiveness of Magnetic Composite Material on Copper Loss Reductions and Misalignment in Copper‐Plate‐Coils for Wireless Power Transmission

Calculation and Decrease of Zigzag Leakage Flux Losses in a Wet Submersible Induction Machine by the Virtual Permanent Magnet Harmonic Machine Model

Contact Info

Product

Resources

About