scholarly journals Calculation Methodologies of Complex Permeability for Various Magnetic Materials

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2167
Author(s):  
Eun S. Lee ◽  
Byeong Guk Choi
Keyword(s):  
Magnetic Materials ◽  
High Frequency ◽  
Core Loss ◽  
Operating Frequency ◽  
Complex Permeability ◽  
Magnetic Characteristics ◽  
Ferrite Core ◽  
Function Generator ◽  
The Real ◽  
The Core

In order to design power converters and wireless power systems using high-frequency magnetic materials, the magnetic characteristics for the inductors and transformers should be specified in detail w.r.t. the operating frequency. For investigating the complex permeability of the magnetic materials by simply test prototypes, the inductor model-based calculation methodologies for the complex permeability are suggested to find the core loss characteristics in this paper. Based on the measured results of the test voltage Ve, current Ie, and phase difference θe, which can be obtained simply by an oscilloscope and a function generator, the real and imaginary permeability can be calculated w.r.t. operating frequency by the suggested calculation methodologies. Such information for the real and imaginary permeability is important to determine the size of the magnetic components and to analyze the core loss. To identify the superiority of the high-frequency magnetic materials, three prototypes for a ferrite core, amorphous core, and nanocrystalline core have been built and verified by experiment. As a result, the ferrite core is superior to the other cores for core loss, and the nanocrystalline core is recommended for compact transformer applications. The proposed calculation for the complex (i.e., real and imaginary) permeability, which has not been revealed in the datasheets, provides a way to easily determine the parameters useful for industrial electronics engineers.

A Study on the Core Loss of SPWM Inverter Drive IPMSM considering High Frequency Harmonics

2020 ◽  
Vol 25 (3) ◽  
pp. 335-340
Author(s):  
Do-hyun Kim ◽  
Byeong-chul Lee ◽  
Cheon-ho Song ◽  
Ki-chan Kim
Keyword(s):  
High Frequency ◽  
Core Loss ◽  
The Core

New Core Loss Measurement Method for High-Frequency Magnetic Materials

2014 ◽  
Vol 29 (8) ◽  
pp. 4374-4381 ◽  
Author(s):  
Mingkai Mu ◽  
Qiang Li ◽  
David Joel Gilham ◽  
Fred C. Lee ◽  
Khai D. T. Ngo
Keyword(s):  
Magnetic Materials ◽  
High Frequency ◽  
Measurement Method ◽  
Core Loss ◽  
Loss Measurement

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.

scholarly journals High-Frequency Core Loss Analysis of High-Speed Flux-Switching Permanent Magnet Machines

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1076
Author(s):  
Wenfei Yu ◽  
Wei Hua ◽  
Zhiheng Zhang
Keyword(s):  
Permanent Magnet ◽  
Numerical Method ◽  
High Frequency ◽  
High Speed ◽  
Core Loss ◽  
Hysteresis Loops ◽  
Prediction Method ◽  
Element Analysis ◽  
The Core ◽  
Core Losses

Accurate prediction of core losses plays an important role in the design and analysis of flux-switching permanent magnet (FSPM) machines, especially during high-speed and high-frequency operation. Firstly, based on the numerical method, a high-frequency core loss prediction method considering a DC-bias magnetization component and local hysteresis loops as well as the harmonic effect is proposed. Secondly, the magnetizing characteristics of the silicon steel sheet and, consequently, the core loss of the electrical steel used as the core lamination are measured. Then, the loss coefficient of each core loss component is obtained by the data fitting tool. Based on the proposed method, the stator and rotor core losses of a three-phase, 12-stator-slot, and 10-rotor-pole (12/10) FSPM machine with different soft iron materials and driving modes are calculated. Finally, the results of the numerical method are verified by conventional finite element analysis.

scholarly journals Repetitive induction voltage modulator for heavy ion fusion

2002 ◽  
Vol 20 (4) ◽  
pp. 609-612 ◽  
Author(s):  
K. HORIOKA ◽  
M. NAKAJIMA ◽  
M. WATANABE ◽  
M. HONDA ◽  
E. HOTTA ◽  
...  
Keyword(s):  
Magnetic Materials ◽  
Field Effect Transistors ◽  
Core Loss ◽  
Heavy Ion ◽  
High Energy ◽  
Magnetic Core ◽  
Magnetic Characteristics ◽  
Beam Loading ◽  
Wide Range ◽  
Institute Of Technology

Activities of research and development on repetitive induction voltage modulators in the Tokyo Institute of Technology–High Energy Accelerator Research Organization group are presented along with a discussion of the magnetic response of ferro-magnetic materials to fast magnetization and a transient beam loading in the modulators. The modulator is composed of independently driven modules switched by field effect transistors. To make waveform control, the induced voltages are stacked and synthesized in the induction unit. A proof-of-principle experiment shows that the module elements are successfully operated up to megahertz levels with good reproducibility. For the evaluation of magnetic core response, magnetic characteristics are investigated over a wide range of parameters, and an empirical core loss scaling is derived at minor-hysteresis loops. Using the prototype induction module, we have also investigated the effect of beam loading. Results indicate that the effect depends not only on the impedance of the driving circuit but on nonlinearity of the magnetic-core response. This means that the response of the induction modulator depends on the time scale of domain motion and operating point in the B-H plane of magnetic materials. Based on the progress of the component technology in the induction accelerator and database of magnetic materials, a system design has been developed.

scholarly journals Construction and Simulation of a Planar Transformer Prototype

2021 ◽  
Vol 2 (2) ◽  
pp. 1-7
Author(s):  
Sebastián Guarín ◽  
Sergio Velarde ◽  
Edwin Castaño ◽  
Alexander Molina-Cabrera
Keyword(s):  
High Frequency ◽  
Simulation Software ◽  
Magnetic Flux Density ◽  
Ferrite Core ◽  
The Core ◽  
Transformation Ratio ◽  
Building Process ◽  
Pcb Design ◽  
Design Software ◽  
Transformer Output

This paper illustrates the design and building of a planar transformer prototype with a 1:1 transformation ratio for high-frequency applications in power electronics. By using reference literature and considering the ferrite core dimensions, the windings were conceived and exported to Gerber format using PCB design software. The transformer prototype was then assembled and tested under laboratory conditions for frequencies from 800 Hz to 5 MHz, which showed a sinusoidal wave at the transformer output from 1.3 kHz onwards and a better performance starting at 10 kHz, where the loses were significantly reduced and the transformation ratio was closer to the originally designed. As a final step, a finite element method (FEM) análisis was carried out to understand the electromagnetic flux behavior using a 3D Multiphysics simulation software. The 3d building process and details are explained step by step and the resulting magnetic flux density is graphically shown for the core and the windings.

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