scholarly journals Core-Loss Analysis of Linear Magnetic Gears Using the Analytical Method

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2905
Author(s):  
Jeong-In Lee ◽  
Kyung-Hun Shin ◽  
Tae-Kyoung Bang ◽  
Kyong-Hwan Kim ◽  
Key-Yong Hong ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Analytical Method ◽  
Core Loss ◽  
Harmonic Component ◽  
Magnetic Behavior ◽  
Magnetic Flux Density ◽  
The Finite Element Method ◽  
Loss Analysis ◽  
Flux Modulation ◽  
Loss Characteristic

In this study, analysis of core-loss occurring in the magnetic flux modulation core of a linear magnetic gear and the core of each mover is presented, using an analytical method. Losses in electric machines were generally calculated and analyzed using the finite element method (FEM). However, in the case of core-loss, the exact loss value could not be calculated using FEM data. Therefore, we considered the harmonic component of the air-gap magnetic flux density waveform with the modified Steinmetz equation, and performed a more accurate core-loss analysis with magnetic behavior analysis. Thus, we performed a calculated core-loss characteristic comparison with the FEM and the modified Steinmetz equation.

scholarly journals A Novel Excitation Approach for Power Transformer Simulation Based on Finite Element Analysis

2021 ◽  
Vol 11 (21) ◽  
pp. 10334
Author(s):  
Wen-Ching Chang ◽  
Cheng-Chien Kuo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Flux ◽  
Flux Density ◽  
Power Transformer ◽  
Core Loss ◽  
Power Transformers ◽  
Magnetic Flux Density ◽  
External Excitation ◽  
Element Method

Power transformers play an indispensable component in AC transmission systems. If the operating condition of a power transformer can be accurately predicted before the equipment is operated, it will help transformer manufacturers to design optimized power transformers. In the optimal design of the power transformer, the design value of the magnetic flux density in the core is important, and it affects the efficiency, cost, and life cycle. Therefore, this paper uses the software of ANSYS Maxwell to solve the instantaneous magnetic flux density distribution, core loss distribution, and total iron loss of the iron core based on the finite element method in the time domain. . In addition, a new external excitation equation is proposed. The new external excitation equation can improve the accuracy of the simulation results and reduce the simulation time. Finally, the three-phase five-limb transformer is developed, and actually measures the local magnetic flux density and total core loss to verify the feasibility of the proposed finite element method of model and simulation parameters.

Orientation of Island and Small Grains in Grain Oriented Electrical Steels

2013 ◽  
Vol 753 ◽  
pp. 530-533
Author(s):  
Jong Tae Park ◽  
Hyun Seok Ko ◽  
Hyung Don Joo ◽  
Dae Hyun Song ◽  
Kyung Jun Ko ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Magnetic Flux ◽  
Core Loss ◽  
Secondary Recrystallization ◽  
Magnetic Flux Density ◽  
Recrystallization Annealing ◽  
Goss Texture ◽  
Electrical Steels ◽  
Small Grains

Grain oriented electrical steels should have low core loss and high magnetic flux density. These properties are closely related with sharpness of {110} texture after secondary recrystallization. This Goss texture develops by abnormal grain growth during secondary recrystallization annealing. Based on experimental results, a general suggestion which estimates the magnetic properties after secondary recrystallization from a primary recrystallized texture can be made. For a material to have better magnetic properties after secondary recrystallization, its primary recrystallized texture should have not only larger number of ideal Goss grains, but also lower frequency of low angle grain boundary around those Goss grains.

Effect of Antimony on the Structure, Texture and Magnetic Properties of High Efficiency Non-Oriented Electrical Steel

2012 ◽  
Vol 602-604 ◽  
pp. 435-440 ◽  
Author(s):  
Na Li ◽  
Li Xiang ◽  
Pei Zhao
Keyword(s):  
Magnetic Properties ◽  
Magnetic Flux ◽  
Flux Density ◽  
High Efficiency ◽  
Electrical Steel ◽  
Core Loss ◽  
Magnetic Flux Density ◽  
Antimony Content ◽  
The Core ◽  
Maximum Value

The effect of antimony on the structure, texture and magnetic properties of high efficiency non-oriented electrical steel were investigated. The results showed that antimony played an important role on inhibiting the grain growth and enhancing the fraction of favorable texture in the annealed steels. With the increase of antimony content, core loss of specimens monotonously increased and the magnetic flux density increased firstly and then decreased. The magnetic properties of specimen results showed that the magnetic flux density in the steel with 0.12% antimony reached the maximum value, while the core loss didn’t increase obviously. However, when the antimony content in steel reached 0.22%, the magnetic properties deteriorated significantly. This is maybe that the addition of antimony in steels inhibited the development of {111} texture content and increased the intensity of Goss and {100} texture on the grain boundary.

The Effects of Hot Band Annealing Temperature on the Texture of 1% an 2%Si Nonoriented Electrical Steels

2007 ◽  
Vol 558-559 ◽  
pp. 701-706
Author(s):  
Jae Young Choi ◽  
Jong Tae Park ◽  
Byung Keun Bae ◽  
Jae Kwan Kim
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Annealing Temperature ◽  
Core Loss ◽  
Cube Texture ◽  
Magnetic Flux Density ◽  
Middle Plane ◽  
Goss Texture ◽  
Final Annealing ◽  
Hot Band

The effects of hot band annealing temperature on the texture of the 1% and 2%Si nonoriented electrical steel were investigated. Slab was hot rolled and then hot band annealed in the temperature range of 900°C~1100°C. The magnetic flux density and the core loss were improved by the hot band annealing because of the texture improvement. As the hot band annealing temperature was increased, the magnetic properties were improved. The microstructure of the hot band was composed of a recrystallized structure at the surface and a deformed structure near the middle plane. These hot bands were completely recrystallized after annealing above 1000°C. The main texture of the hot band was rotated cube and gamma-fibre. After hot band annealing, rotated cube changed to cube texture and gamma-fibre intensity gradually decreased. In the case of specimen without hot band annealing, rotated cube in the middle plane was changed to near {111}<112>texture and Goss texture in the surface to gamma fibre after final annealing. In the case of the hot band annealed at 900°C, Goss texture and cube texture were developed. After final annealing, the {111} and {112} texture was dramatically decreased as the hot band annealing temperature was increased. Although the total {100} texture intensity was not changed, Cube texture, {100}<001>, was strengthened and rotated cube texture, {100}<011>, weakened for 2% Si steel. However, 1% Si steel was opposed to 2% Si steel. The {110} texture was strengthened irrespective of hot band annealing temperature. As the hot band annealing temperature was increased, the Goss texture was strengthened, and this makes the anisotropy of the magnetic flux density bigger.

scholarly journals Assessment of motor core loss, copper loss and magnetic flux density with PAM inverter under dissimilar excitation angles

2020 ◽  
Vol 14 (4) ◽  
pp. 622-637
Author(s):  
Nguyen Gia Minh Thao ◽  
Shuangshuang Zhong ◽  
Keisuke Fujisaki ◽  
Fujiyuki Iwamoto ◽  
Tomonori Kimura ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Core Loss ◽  
Magnetic Flux Density ◽  
Copper Loss

Correlation between Texture at Primary Recrystallized State and Magnetic Properties in Grain Oriented Electrical Steels

2011 ◽  
Vol 702-703 ◽  
pp. 726-729
Author(s):  
Jong Tae Park ◽  
Hyung Don Joo ◽  
Dae Hyun Song ◽  
Kyung Jun Ko ◽  
No Jin Park
Keyword(s):  
Magnetic Properties ◽  
Grain Boundary ◽  
Magnetic Flux ◽  
Grain Growth ◽  
Core Loss ◽  
Secondary Recrystallization ◽  
Magnetic Flux Density ◽  
Recrystallization Annealing ◽  
Goss Texture ◽  
Electrical Steels

Desirable magnetic properties for grain oriented electrical steels are low core loss and high magnetic flux density. These properties are closely related with sharpness of {110} texture. This Goss texture develops by abnormal grain growth during secondary recrystallization annealing. Based on experimental results, a general suggestion which estimates the magnetic properties after completion of secondary recrystallization from a primary recrystallized texture can be proposed. For a material to have better magnetic properties after completion of secondary recrystallization, it should have a primary recrystallized texture in which there are not only large number of ideal Goss grains, but also lower frequency of low angle grain boundary around those Goss grains.

Sign in / Sign up

Export Citation Format

Share Document