A new bridge-connected magnetic circuit using amorphous magnetic core and its applications

1978 ◽  
Vol 14 (5) ◽  
pp. 966-968 ◽  
Author(s):  
K. Murakami ◽  
T. Watanabe ◽  
A. Goto
Keyword(s):  
Magnetic Circuit ◽  
Magnetic Core

Circuit Model of Nonlinear Inductor with Magnetic Core Based on Duality Theory

2012 ◽  
Vol 614-615 ◽  
pp. 1344-1347
Author(s):  
Guang Yang
Keyword(s):  
Topological Structure ◽  
Duality Theory ◽  
Magnetic Circuit ◽  
Magnetic Core ◽  
Circuit Model ◽  
Model Based ◽  
Simulation Results

A circuit model of nonlinear inductor with magnetic core based on duality theory is presented in this paper. The presented circuit model of the nonlinear inductor can reflect the magnetic circuit topological structure of the magnetic core very well. The circuit model of the nonlinear inductor based on duality theory was implemented in the PSCAD software for verification. The transient temporal simulation was made at 50 Hz and 500 Hz. The validation of the circuit model based on duality theory has been verified by comparing the simulation results obtained by PSCAD software and ANSOFT software.

Design and experimental study of the porous foam metal magnetorheological fluid damper based on built-in multi-pole magnetic core

2020 ◽  
Vol 31 (5) ◽  
pp. 687-703 ◽  
Author(s):  
Dan Zhao ◽  
Jianbin Zhao ◽  
Zhenghang Zhao ◽  
Yang Liu ◽  
Shaogang Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Circuit ◽  
Magnetorheological Fluid ◽  
Effective Area ◽  
Magnetic Core ◽  
Damping Force ◽  
Output Performance ◽  
Magnetorheological Fluid Damper ◽  
Fluid Damper ◽  
Foam Metal

The porous foam metal magnetorheological fluid damper has a broad application prospect in the field of vibration isolation of precision instruments with small damping force because it does not need complex dynamic seal structure. The traditional single-ring magnetic pole porous foam metal magnetorheological fluid damper has a small effective area for the magnetic core that affects the damper output range due to the geometric constraints of the coil and the low magnetic field utilization. Therefore, in order to increase the effective area ratio of the magnetic core, this article introduces the built-in multi-pole magnetic core into the porous metal magnetorheological fluid damper and integrates four axial wound fan-shaped magnetic poles on the magnetic core to improve the output performance of the damper. The magnetic circuit is analyzed based on Ohm’s law of magnetic circuit, and the mathematical model of damping force is established. Based on this, the important geometric parameters of the damper are determined. The finite element method is used to simulate the magnetic field of the damper, and the output performance of the damper is numerically simulated. The dynamic performance test system of the damper is set up to test the designed damper, and the test data and numerical simulation results are verified with each other. The results show that the damping force peak and dynamic regulation range of the damper designed in this article are higher than those of the traditional porous foam metal magnetorheological fluid damper with magnetic core, which effectively improves the mechanical properties of the magnetorheological fluid damper with porous foam metal.

scholarly journals Magnetic Core Width of a Linear Parametric Motor with Open Magnetic Circuit.

2002 ◽  
Vol 26 (4) ◽  
pp. 685-688
Author(s):  
Y. Kimura ◽  
K. Ishikawa ◽  
S. Kikuchi
Keyword(s):  
Magnetic Circuit ◽  
Magnetic Core ◽  
Core Width

INTEGRATED STACKED-SPIRAL RF INDUCTOR WITH NANOPOWDER MAGNETIC CORE

2013 ◽  
Vol 22 (10) ◽  
pp. 1340022
Author(s):  
JING ZHANG ◽  
CHEN YANG ◽  
XIN WANG ◽  
TIAN-LING REN ◽  
ALBERT WANG ◽  
...  
Keyword(s):  
Magnetic Circuit ◽  
Magnetic Loss ◽  
Magnetic Loop ◽  
Magnetic Core ◽  
Proof Of Concept ◽  
Frequency Range ◽  
Traditional Concept ◽  
Ferrite Nanoparticle ◽  
On Chip ◽  
Rf Inductor

On-chip stacked-spiral radio-frequency (RF) inductor with vertical nanopowder-magnetic-core was proposed and implemented in standard 0.18 μm six-metal CMOS with a post-CMOS backend process module (i.e., CMOS+). To improve on the prior open-magnetic-circuit-loop structure and thus limited improvement at multi-GHz performance, the non-traditional concept shows vertical magnetic core forming a near closed magnetic loop. The ferrite nanoparticle-magnetic-core reduced magnetic loss to improve L-density to 9 GHz. Results show the proof-of-concept designs greatly increase the inductance, L, by up to 34% and the factor, Q, by 62% over a multi-GHz frequency range.

scholarly journals Influence of the load of the power transformer on the magnetizing current

2021 ◽  
Vol 2131 (4) ◽  
pp. 042097
Author(s):  
S Ivankov ◽  
S Zagulyaev ◽  
D Gukov
Keyword(s):  
Cross Section ◽  
Magnetic Circuit ◽  
Power Transformer ◽  
Magnetic Core ◽  
Significant Error ◽  
Continuous Operation ◽  
Power Transformers ◽  
Magnetic Scattering ◽  
Testing Power ◽  
Magnetizing Current

Abstract Data on the magnetizing current of power transformers are taken from the experience of idling. It is considered that it does not change under load. The experience of idling does not take into account the uneven saturation of the magnetic core when working under load. The hypothesis of a significant error caused by this assumption is put forward. The experiments carried out confirmed the hypothesis. The differences in the measurement of the magnetizing current at idle and under load in the experiments reached 28-32%. This determines the inaccuracy in the calculations of currents and losses in power transformers, which, taking into account the continuous operation of transformers and their large number, can be significant. It is proposed to add the experience of working at rated load when testing power transformers. This experience will not only allow us to clarify the val-ue of the magnetizing current under load and magnetic losses, but also to re-fine the design of the transformer in the direction of reducing the magnetizing current by eliminating uneven saturation of the magnetic circuit when working under load, due to the influence of magnetic scattering fields. This is possible by locally increasing the cross-section of the magnetic circuit in the busiest places of the magnetic circuit.

A new power measuring circuit using a bridge-connected magnetic circuit and another magnetic core

1991 ◽  
Vol 27 (6) ◽  
pp. 5268-5270 ◽  
Author(s):  
S. Okanuma ◽  
O. Ichinokura ◽  
K. Murakami
Keyword(s):  
Magnetic Circuit ◽  
Magnetic Core ◽  
Measuring Circuit

Evaluation of DC Brush-Less Motors Using Powder Magnetic Cores

2007 ◽  
Vol 534-536 ◽  
pp. 1317-1320
Author(s):  
Katsuhiko Mori ◽  
Ryoji Nakayama ◽  
Kinji Kanagawa
Keyword(s):  
High Speed ◽  
Magnetic Circuit ◽  
Three Dimensional ◽  
Magnetic Core ◽  
Factory Automation ◽  
Steel Core ◽  
Magnetic Cores

A high-speed motor and a DC brush-less motor for factory automation (FA) were made to investigate the applicability of the powder magnetic core to motor application. The performances of these motors were compared with the similar motors having conventional electromagnetic steel core. Although the permeability and saturated magnetization of powder magnetic core were less than those of electromagnetic steel core, the output performances of each core motor were almost the same. The FA motor with powder magnetic core using three-dimensional magnetic circuit showed higher torque than the electromagnetic steel core motor with the same volume.

Universal mathematical model of asynchronous machine as an element microgrid in smart grid

2021 ◽  
Vol 8 (3) ◽  
pp. 444-453
Author(s):  
P. F. Gogolyuk ◽  
◽  
O. P. Hoholyuk ◽  
T. A. Kutsyk ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Smart Grid ◽  
Magnetic Circuit ◽  
Induction Machine ◽  
Magnetic Core ◽  
Active Power ◽  
Power Losses ◽  
Electric Power Supply ◽  
Active Power Losses ◽  
Supply Systems

An universal mathematical model of an induction machine (IM) has been constructed, taking into account the saturation of the main magnetic circuit of its magnetic core and the active power losses. The proposed approach to IM modeling expands the abilities of MATLAB / Simulink environment for analysis of the electric power supply systems (microgrid in the smart grid) with the nonlinear elements and dynamic load in abnormal, asymmetric and fault regimes.

Design of Miniature Electromagnetic Induction Type MEMS Generators With Multilayer Ceramic Circuit

2015 ◽  
Author(s):  
Minami Takato ◽  
Hiroaki Endo ◽  
Yuji Yokozeki ◽  
Kazuaki Maezumi ◽  
Ken Saito ◽  
...  
Keyword(s):  
Rotational Motion ◽  
Electromagnetic Induction ◽  
Magnetic Circuit ◽  
Three Dimensional ◽  
Magnetic Core ◽  
Ceramic Technology ◽  
Micro Electro Mechanical Systems ◽  
Air Turbine ◽  
Induction Type ◽  
Multilayer Ceramic

This paper discusses the design of a miniature electromagnetic induction type air turbine generator with a multilayer ceramic magnetic circuit. The air turbine is fabricated using a micro electro mechanical systems (MEMS) process, which can form high-accuracy, high-aspect-ratio parts. The magnetic circuit is fabricated using a multilayer ceramic technology that can form a three-dimensional conductor pattern into which a magnetic material can be introduced. By combining these technologies, a miniature generator comprising a miniature magnetic circuit with a helical conductor structure and magnetic core is achieved. In this study, a three-phase and a single-phase generator were fabricated, which produced rotational motion and output waveforms. In this paper, the generators are discussed with respect to the rotational motion and the shape of the magnetic circuit.

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