Magnetic Assemblies
Magnetic Assemblies - Related Videos
14:55
Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Cited by 3 •
2017
Structures of supramolecular protein assemblies at atomic resolution are of high relevance because of their crucial roles in a variety of biological phenomena. Herein, we present a protocol to perform high-resolution structural studies on insoluble and non-crystalline macromolecular protein assemblies by magic-angle spinning solid-state nuclear magnetic resonance spectroscopy (MAS SSNMR).
11:36
Assembly, Loading, and Alignment of an Analytical Ultracentrifuge Sample Cell
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Cited by 21 •
2009
The analytical ultracentrifuge (AUC) sample cell holds sample and reference buffer and during experiments and is exposed to high vacuum and rotor speeds up to 60,000 rpm. This video will demonstrate the rigorous attention to detail necessary for assembly, loading and alignment of this very important component of an AUC experiment.
10:04
Magnetic Fields
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Magnetic fields can be generated by moving charges, such as an electrical current. The magnetic field generated by a current can be calculated from the Maxwell equation. In addition, magnetic objects such as bar magnets can also generate magnetic fields due to microscopic dynamics of charges inside the material. Magnetic fields will exert magnetic force on other moving...
10:23
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
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Cited by 1 •
2016
A protocol for the synthesis and cationization of cobalt-doped magnetoferritin is presented, as well as a method to rapidly magnetize stem cells with cationized magnetoferritin.
10:21
Metabolic Support of Excised, Living Brain Tissues During Magnetic Resonance Microscopy Acquisition
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Cited by 2 •
2017
The current protocol describes a method by which users can maintain viability of acute hippocampal and cortical slice preparations during the collection of magnetic resonance microscopy data.
FAQs
Magnetic assemblies concentrate flux by combining suitable magnetic materials with pole pieces, controlled geometry, and deliberate pole alignment. These features guide the field toward a desired region instead of allowing excessive leakage. The resulting distribution affects field strength and force, allowing engineers to tailor performance for devices that require directed magnetic action.
Air gaps and pole alignment influence how effectively magnetic flux crosses the intended path. Changes in gap size or alignment can alter the available force, field strength, and stability of the assembly. Engineers therefore control these features carefully when designing systems that must deliver repeatable magnetic behavior under operating conditions.
Ferromagnetic components and pole pieces help shape and direct the magnetic field produced by permanent magnets. Their placement and geometry determine where flux is concentrated and how much leakage occurs. Structural elements provide the physical framework needed to maintain these relationships, supporting stable operation while the assembly experiences mechanical or thermal stresses.
A design evaluation should consider the permanent magnets, ferromagnetic components, pole pieces, structural elements, magnetic flux, material properties, geometry, air gaps, and pole alignment. These variables jointly determine force, field strength, and stability. Engineers also need to account for mechanical and thermal stresses so the assembly remains reliable and performs efficiently in its intended device.
Magnetic assemblies support a broad range of engineering systems, including motors, generators, sensors, actuators, couplings, lifting systems, and magnetic separation equipment. The required arrangement depends on whether the application needs controlled motion, energy conversion, sensing, mechanical transfer, lifting force, or separation. Their design determines how effectively the magnetic field serves that function.
Engineers can improve performance by concentrating magnetic flux where it is needed, reducing leakage, and selecting geometries and materials that provide suitable force, field strength, and stability. The assembly must also withstand mechanical and thermal stresses. Applying these principles helps magnetic devices operate more efficiently and reliably across motors, actuators, generators, and other equipment.