[PDF] Calculation of the magnetic stray field of a uniaxial magnetic …
Calculation of the magnetic stray field of a uniaxial magnetic domain. R. Engel-Herbert, T. Hesjedal. Published 29 March 2005. Physics. Journal of Applied Physics. We present an analytic solution for the magnetic field of a bar-shaped permanent magnet. Assuming a constant magnetization, we derive expressions for the stray field in three …
A New Technique for the Subdomain Method in Predicting …
Abstract: Surface-mounted permanent magnet (SPM) motors with shaped magnets and a quasi-regular polygon rotor core (QPRC) are challenging to analyze in terms of accuracy and speed because of the special structure. This article proposes a new technique for the subdomain method which can accurately predict the electromagnetic …
Air-gap magnetic field design optimization for U-shaped …
A U-shaped ironless permanent magnet linear synchronous motor, made by our group, is studied in this paper. The magnetic flux density stabilization is a primary problem, as the air-gap magnetic ...
Design and Optimization of the Irregular Shaped Permanent Magnet …
The magnetic recoil spectrometer (MRS) system was established and optimized for precisely measuring the absolute neutron energy spectrum in high-resolution implosion experiments at the High Magnetic Field Laboratory of the Chinese Academy of Sciences (CHFML). The MRS system generates an irregular magnetic field that is …
Modeling of Axial Magnetic Force and Stiffness of Ring-Shaped Permanent …
A novel ring-shaped permanent-magnet passive vibration isolator is mainly reported in this paper. An analytical expression of axial magnetic force of the isolator is derived and validated by the finite element analysis and experiment. It proves that the analytical expression is efficient. An analytical expression of the axial stiffness of the…
Big Area Additive Manufacturing of High Performance …
The ideal M-H hysteresis loops for a permanent magnet should be square shaped, which gives a (BH) max = ¼ μ 0 J s 2, where J s = 4πM s is the saturation magnetization in unit of gauss20. The M ...
Analysis of Radial Electromagnetic Force and Vibration
Purpose This paper comprehensively analyses the radial electromagnetic (EM) force by unit area and vibration characteristics in a permanent magnet synchronous motor (PMSM). This provides the possibility to verify the action law, causes, and influencing factors of vibration deformation and provides new ideas for vibration management. …
Permanent Magnets Design Guide | Magnetics …
See more on intemag
Permanent Magnets and Electromagnets
WEBAs the name suggests, a permanent magnet is any magnetic material whose atoms have been permanently aligned to create a persistent magnetic field. The magnetizing process occurs during manufacturing. …
Magnetic field of an irregularly shaped permanent magnet…
The magnetic field of an irregularly shaped permanent magnet can be measured using a magnetometer, which is a device that detects and measures the strength and direction of a magnetic field. The magnetometer can be moved around the magnet to map out the magnetic field lines and determine its overall strength.
Comparative study of thrust of U-shaped ironless permanent magnet …
Due to the large transverse edge effect for U-shaped ironless permanent magnet synchronous linear motor affect the distribution of air gap magnetic field is large, it will reduce the no-load back electromotive force and thrust. This paper proposes a novel method to evaluate the effect of transverse edge effect based on Kriging surrogate model.
Improvement of the rotational characteristics in the HTSC-permanent …
DOI: 10.1016/J.PHYSC.2013.04.035 Corpus ID: 121033788; Improvement of the rotational characteristics in the HTSC-permanent magnet hybrid bearing using ring shaped magnet @article{Emoto2013ImprovementOT, title={Improvement of the rotational characteristics in the HTSC-permanent magnet hybrid bearing using ring shaped …
A Novel Asymmetric Hybrid-Layer Del-Shaped Rotor Interior Permanent …
Abstract: Interior permanent magnet (IPM) motors have garnered widespread popularity in electric vehicle (EV) applications due to their distinctive advantages, including superior torque density, high efficiency, and a wide speed range. In this work, the asymmetric hybrid-layer del-shaped ( $nabla $ -shaped) IPM motor is …
A Novel Permanent Magnet Vernier Machine With Coding-Shaped …
It is well known that permanent magnet Vernier machine (PMVM) has multiple flux field harmonics, which can produce stable torque. However, some flux field harmonics would create torque that undermines the total torque output. Such as the 6 slots 26 poles split-tooth PMVM here, of which modulated flux field outputs torque while fundamental flux …
Analytical Method for the Magnetic Field Line
Flux reversal linear rotary permanent magnet actuator (FR-LRPMA) is a two-degree-of-freedom actuator with two ferro-magnetic (Fe) poles and two permanent magnet (PM) poles mounted on the surface ...
Improved V‐shaped interior permanent magnet …
Interior permanent magnet synchronous machines (IPMSMs) with V-shaped permanent magnet (PM) rotors are widely used as traction motors in electric vehicles because of their high torque …
20.1 Magnetic Fields, Field Lines, and Force
Describe and interpret drawings of magnetic fields around permanent magnets and current-carrying wires. Calculate the magnitude and direction of magnetic force in a …
Design of Three-Phase V-Shaped Interior Permanent Magnet …
Air conditioning system of electric vehicles has new change as the internal combustion engine is being replaced with electrified AC motor. With large amount of batteries installed at the bottom of frame, the conventional compressor, which is belt-driven, can be removed, and another AC motor can play the role for air conditioning in electric …
Static magnetic field analysis of hollow-cup motor model and bow-shaped
The hollow-cup Permanent Magnet (PM) motors have the characteristics of low power consumption, and are widely used in the aerospace field. At present, the tile-shaped PMs used by hollow-cup PM motors have poor sinusoidal characteristics of the air gap magnetic flux density waveform, which will cause torque ripple.
21.1: Magnetism and Magnetic Fields
Example of a Permanent Magnet: An example of a permanent magnet: a "horseshoe magnet" made of alnico, an iron alloy. The magnet is made in the shape of a horseshoe to bring the two magnetic poles close to each other, to create a strong magnetic field …
Improvement of the rotational characteristics in the HTSC-permanent …
In the hybrid system, the additional permanent magnet is set on the other side of the HTSC. Repulsive force of the permanent magnets is used for the levitation. Thus levitation force is increased [5]. In this system, one permanent magnet is installed in the rotor [6], and the other ring shaped permanent magnet and the HTSC are installed …
Dipolar Halbach magnet stacks made from identically shaped permanent …
An infinitely long cylinder made from a hard permanent magnet material is polarized in a continuous way such that the magnetization vector undergoes a rotation by 720° along the circumference of the ring ... which quantifies the more efficient use of the space available on the magnet circle by the prism-shaped magnets. On the other hand, …
Improvement of unidirectional focusing periodic permanent magnet …
The new transducer consists of a fan-shaped periodic permanent magnet with three centripetal coils while the center of the coil is defined as the focal point. The propagation direction of the SH guided wave excited by the Lorentz force is pre-determined as it propagates bidirectionally along the surface of the aluminum plate and …
Permanent Magnet Shapes | Dexter Magnetic Technologies
When Dexter Magnetic Technologies was founded in 1951 as Permag, it was the first magnet provider to machine magnet shapes based on customer requirements and we continue the tradition of offering you a variety of magnet options. As an all-in-one magnetic solution provider, we are able to fabricate standard permanent magnet shapes and …
Comparison of Magnetic Levitation Systems …
The magnetic suspension is assured by the repulsion of proper shaped permanent magnets that are present both on the fixed guide and on the moving suspended part.
A parametric and comparative study of a permanent magnet …
2.1 Permanent magnet models. Two permanent magnet arrangements were considered in this study. Initially, a C-shaped permanent magnet model was developed based on the Vasile and Muller model [], with 1 gap (Fig. 2a).In a magnetic circuit, the gap represents an element of high reluctance since air has a lower magnetic …
Design and Optimization of the Irregular Shaped Permanent Magnet …
The magnetic recoil spectrometer (MRS) system was established and optimized for precisely measuring the absolute neutron energy spectrum in high-resolution implosion experiments at the High Magnetic Field Laboratory of the Chinese Academy of Sciences (CHFML). The MRS system generates an irregular magnetic field that is wedge-shaped …
Modeling of Axial Magnetic Force and Stiffness of Ring-Shaped Permanent …
Compared with the 10 basic configurations of the ring-shaped permanent magnets, configuration (B2), the outer magnetic ring magnetized radially, and the inner one magnetized axially, meet the ...
Magnetic Properties of Permanent Magnets
permanent magnets. Subchapter 1.1 discusses the properties of the materials, which do not depend on the magnet shape, while subchapter 1.2 discusses …
Static magnetic field analysis of hollow-cup motor model and bow-shaped
The hollow-cup Permanent Magnet (PM) motors have the characteristics of low power consumption, and are widely used in the aerospace field. At present, the tile-shaped PMs used by hollow-cup PM ...
Permanent Magnet Shapes | Dexter Magnetic …
As an all-in-one magnetic solution provider, we are able to fabricate standard permanent magnet shapes and sizes in prototype or …
