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Magnetic circuit

About: Magnetic circuit is a research topic. Over the lifetime, 15707 publications have been published within this topic receiving 118099 citations.


Papers
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Patent
03 May 2007
TL;DR: In this article, a magnetic recording head includes a main pole which generates a recording magnetic field, a return pole which forms a closed magnetic circuit for the magnetic field and a side shield magnetically spaced from the main pole in a cross-track direction.
Abstract: According to one embodiment, a perpendicular magnetic recording head includes a main pole which generates a recording magnetic field, a return pole which forms a closed magnetic circuit for the recording magnetic field, and a side shield magnetically spaced from the main pole in a cross-track direction in which a point on a trailing edge of the side shield which is closest to the main pole is positioned on a leading side of a trailing edge of the main pole.

40 citations

Patent
09 Jul 1990
TL;DR: In this paper, a media mill with a magnetic circuit of magnetic impellers on a shaft, magnetized media, and a magnetizable outer shell is described. But it is not suitable for the use of magnetic sensors.
Abstract: Media mill having a magnetic circuit of magnetic impellers on a shaft, magnetized media, and a magnetizable outer shell which provides improved efficiency.

40 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present an analytical model of a single-phase open-core FCL, which accurately describes the nonlinear magnetic properties of the FCL through a reduced reluctance approach.
Abstract: A saturated core fault current limiter (FCL) is a device that is designed to limit the fault currents in electrical energy networks and consequently, protect existing network equipment from damage. Due to complex nonlinear magnetic properties, the performance of saturated core FCLs has largely been characterized through experimentation and finite-element analysis simulations. Although both of these techniques are quite accurate, they are time consuming and do not describe the behavior of FCLs in actual electrical networks. This has led to an increasing demand for an accurate analytical model that is suitable for transient network analyses. This paper presents the development of an analytical model of a single-phase open-core FCL, which accurately describes the nonlinear magnetic properties of the FCL through a reduced reluctance approach. The extension of this model to other saturated core FCL arrangements (such as closed core) is also discussed.

40 citations

Patent
06 Aug 1980
TL;DR: In this paper, an electromagnetic flow meter with less power consumption is presented, in which an instantaneous pulsate current with alternately changing polarity at given intervals is fed into an exciting coil, and a velocity of flow of fluid is calculated by using a voltage produced between electrodes in accordance with a residual magnetic flux of a magnetic circuit and a flow velocity of the fluid when no exciting current flows.
Abstract: An electromagnetic flow meter with less power consumption in which an instantaneous pulsate current with alternately changing polarity at given intervals is fed into an exciting coil, and a velocity of flow of fluid is calculated by using a voltage produced between electrodes in accordance with a residual magnetic flux of a magnetic circuit and a flow velocity of the fluid when no exciting current flows.

40 citations

Journal ArticleDOI
24 Jan 2020
TL;DR: This article delves into simultaneously applying the modular stator and segmented rotor to switched reluctance motors (SRMs) with a new double-stator segmented-rotor modular SRM (DSSR-MSRM), which has higher torque compared to the other structures.
Abstract: This article delves into simultaneously applying the modular stator and segmented rotor to switched reluctance motors (SRMs). In this regard, a new double-stator segmented-rotor modular SRM (DSSR-MSRM) with a new pole combination is proposed. First, the motor topology is introduced and the magnetic circuit model of the motor is analyzed. Next, the electromagnetic performances of the machine are analyzed using a finite-element analysis (FEA). The superiority of the DSSR-MSRM in terms of flux linkage and torque is illustrated based on a comparative study with five various types of SRMs with modular/nonmodular and segmented/nonsegmented structures with the same dimensions and parameters. The simulation results indicate that the DSSR-MSRM has higher torque compared to the other structures. Moreover, the dynamic performances of the proposed motor in terms of current, torque, and power waveforms are obtained. In addition, it is shown that the proposed motor has low torque ripple. Finally, the prototype motor is built, the mechanical considerations are discussed, and the experimental results are obtained, which are in a good agreement with those predicted from the FEA.

40 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202359
2022146
2021286
2020462
2019580
2018555