Test Method for High-Frequency (10 kHz-1 MHz) Core Loss of Soft Magnetic Core Components at Controlled Temperatures Using the Voltmeter-Ammeter-Wattmeter Method

2000 ◽  
Author(s):  
Keyword(s):  
High Frequency ◽  
Core Loss ◽  
Magnetic Core ◽  
Test Method ◽  
Soft Magnetic ◽  
Core Components

scholarly journals Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7745
Author(s):  
Lucian-Gabriel Petrescu ◽  
Maria-Catalina Petrescu ◽  
Emil Cazacu ◽  
Catalin-Daniel Constantinescu
Keyword(s):  
High Frequency ◽  
Core Loss ◽  
Magnetic Core ◽  
Soft Magnetic Materials ◽  
Magnetic Flux Density ◽  
Nominal Composition ◽  
Magnetic Alloy ◽  
Soft Magnetic ◽  
Soft Magnetic Alloy ◽  
Electromagnetic Devices

Soft magnetic materials are at the core of electromagnetic devices. Planar transformers are essential pieces of equipment working at high frequency. Usually, their magnetic core is made of various types of ferrites or iron-based alloys. An upcoming alternative might be the replacement the ferrites with FINEMET-type alloys, of nominal composition of Fe73.5Si13.5B9Cu3Nb1 (at. %). FINEMET is a nanocrystalline material exhibiting excellent magnetic properties at high frequencies, a soft magnetic alloy that has been in the focus of interest in the last years thanks to its high saturation magnetization, high permeability, and low core loss. Here, we present and discuss the measured and modelled properties of this material. Owing to the limits of the experimental set-up, an estimate of the total magnetic losses within this magnetic material is made, for values greater than the measurement limits of the magnetic flux density and frequency, with reasonable results for potential applications of FINMET-type alloys and thin films in high frequency planar transformer cores.

Magnetostriction and magnetic core loss at high frequency in amorphous Fe‐Nb‐Si‐B alloys

1983 ◽  
Vol 54 (11) ◽  
pp. 6553-6557 ◽  
Author(s):  
K. Inomata ◽  
M. Hasegawa ◽  
T. Kobayashi ◽  
T. Sawa
Keyword(s):  
High Frequency ◽  
Core Loss ◽  
Magnetic Core

Nanocrystalline Soft Magnetic Fe-M-B (M = Zr, Hf, Nb) “NANOPERM,” Fe-M-O (M = Zr, Hf, Rare Earth) Alloys and Their Applications

1999 ◽  
Vol 577 ◽  
Author(s):  
A. Makino ◽  
A. Inoue ◽  
T. Masumoto
Keyword(s):  
Rare Earth ◽  
Amorphous Phase ◽  
High Frequency ◽  
Core Loss ◽  
Dominant Factor ◽  
Switching Converters ◽  
High Permeability ◽  
Soft Magnetic ◽  
Electric Equipment ◽  
Partial Crystallization

ABSTRACTNew soft magnetic nanocrystalline materials in Fe-M-B (M = Zr, Hf, Nb) and Fe-M-O (M = Zr, Hf, rare earth) systems have been fabricated by use of partial crystallization of melt-spun amorphous phase and sputtering-induced partial crystallization, respectively. These alloys have a mixed structure of nanoscale a-Fe grains and an amorphous phase containing large amount of M, B and M, O, respectively. This structural property should be a dominant factor for achieving good soft magnetic properties in both alloys. The Fe85.5Zr2Nb4B8.5 ribbon exhibits a high mag- netic flux density (Bs) of 1.64 T and a high permeability of 60,000 at 1 kHz as well as a very low core loss of 0.09 W/kg at B = 1.4 T and 50 Hz. The soft magnetic Fe-M-O films with high O content of 10-35 at.% maintain high permeability up to the high frequency above 100 MHz be- cause of higher electrical resistively of 6 to 23 µΩm than those of other conventional soft mag- netic alloy films. The Fe-M-B ribbons "NANOPERM" should be more suitable for low frequen- cy transformers. The Fe-M-O films are useful for high frequency applications such as thin-film inductors and transformers for micro switching converters for portable electric equipment.

A novel flux switching claw pole machine with soft magnetic composite cores

2021 ◽  
pp. 1-21
Author(s):  
Chengcheng Liu ◽  
Qainyu Liu ◽  
Shaopeng Wang ◽  
Youhua Wang ◽  
Gang Lei ◽  
...  
Keyword(s):  
High Frequency ◽  
Permanent Magnets ◽  
Core Loss ◽  
Torque Ripple ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
The Core ◽  
Soft Magnetic Composite ◽  
Torque Coefficient ◽  
3D Finite Element Method

This paper proposes a novel flux switching claw pole machine (FSCPM) with soft magnetic composite (SMC) cores. The proposed FSCPM holds advantages of the conventional flux switching permanent magnet machine (FSPMM) and claw pole machine (CPM) with SMC cores. As permanent magnets are installed between the stator claw pole teeth, FSCPM has good flux concentrating ability, and the air gap flux density can be significantly improved. The torque coefficient of FSCPM is relatively high due to the applied claw pole teeth and global winding. FSCPM is mechanically robust because there are no windings or PMs on its rotor. Moreover, the core loss of FSCPM is relatively low for the SMC material has lower core loss at high frequency compared with silicon steels. The topology and operational principle of FSCPM are explained first. Several main dimensions of the machine are optimized to achieve better performance, based on 3D finite element method (FEM). Furthermore, the rotor skewing technology is adopted to reduce the cogging torque and torque ripple.

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