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The magnetic shielding Lab Kit is highly effective in solving design problems of magnetic interference. An important advantage of the "hands-on" shielding approach is that changes in a circuit layout, shield configuration, power levels and component orientation are easily evaluated. Magnetic shielding for static and low frequency (<100 kHz), time-varying magnetic fields is accomplished by containing a specific device or item within a sheet metal enclosure of high permeability material. The typical magnetic shield design requires sheet metal fabricating and metal forming techniques.
Once a shield enclosure is designed for shielding effectiveness, a mechanical design application is needed. Other typical shapes are similar to electronic chassis where a prefabricated flat panel is formed using a conventional sheet metal press brake and associated forming equipment. The simplest and most effective shape for a magnetic shield is a sheet metal cylinder made of a high permeability material. A spot weld is a simple electrical resistance weld, and a butt, fusion weld is usually accomplished via a process known as TIG (Tungsten, Inert Gas) welding.
When stringent mechanical tolerances are required, metal spinning and hydroforming can be utilized. Hydroforming involves a simple tool machined to the inside dimensions of the part and a hydroform machine. A recent study reveals radiation from solar events is unlikely to affect earth & the dose of radiation emitted during the events isn’t enough to harm people.
This site was developed to explain exactly what magnetic shielding is, what is permeability and how MµShield designs, creates and engineers custom magnetic shielding.
To learn more about MuShield's magnetic shielding materials, please visit Magnetic Shielding Properties page, or the MuMetal web site page with all the technical details.
MµShield Magnetic Shielding offers many services relating to the protection, design and construction of magnetic shielding most often custom designed around your tight tolerances and applications.
Please visit Magnetic Shielding FAQ page for a few of the top most common questions about types, materials used, services and other options to consider, like lower cost materials or common problem solutions.
MµShield Company can provide a wealth of white papers (all in downloadable PDF format) that may answer many more questions about materials, services, capability and solutions for your stringent needs. Every page of this web site has our full contact information in the footer section and is always readily available when you need to call, email or FAX us. Renewable Energy Discussion on various alternative energy, renewable energy, & free energy technologies.
What if we were to remove the gearing in a dual wheel set up, and replace it with a rubber band, or light rubber belt. Nanotechnology Research Center magnetic shieldingEquipment sometimes requires isolation from external magnetic fields. Vitatech simulated the magnetic flux density levels emanating from selected electrical gear and distribution systems during peak loads within the Laboratory Interface Science & Engineering (LISE) building based on the electronic drawings files and updated information provided by Predrag Ciric, Electrical Designer at Bard, Rao + Athanas Consulting Engineers, LLC.
The Harvard LISE project team defined 1 mG Brms (equivalent to 3 mG Bp-p) as the maximum acceptable AC ELF EMI threshold in the basement Imaging Rooms and ground floor Cleanroom laboratory areas. Vitatech wrote the shielding specification and engineered the original shield designs for the project. The European Union SR2S project not only investigates the principles and the scientific problems (of magnetic shielding), but it also faces the complex issues in engineering. Superconducting magnets, commonly found in MRI scanners, produce stronger, more efficient magnetic fields using smaller and lighter magnets than magnets made using conventional materials such as copper or aluminium. On earth, superconducting materials must be cooled to very low temperatures using liquid helium to utilize their superconducting properties, however the project has already found a solution that will work in space.
Simulations of the magnetic system suggest that a 10-meter-diameter magnetic field could be produced by a system weighing less than half that of a comparable passive shield. The SR2S superconducting shield will provide an intense magnetic field, 3,000 times stronger than the Earth’s magnetic field and will be confined around the space craft. An active deflector shield system could never replace passive shielding or biological advances, but it can offer options, particularly for EVAs, extending the longevity of hardware and preventing secondary activation of the ship's hull and systems. WelcomeAre you looking for a Direct Drive Rotary Motor, Linear Motor or Actuator, but can’t quite find the part that meets your design requirements? Magnetic Innovations is a Center of Excellence for Electromechanical Technology and a manufacturer of Rotary & Linear Motors and Generators and customer specific Electromechanical products.

Our focus is on providing the best Electromechanical design optimized to meet or beat the customer application requirements. On a project basis, we offer our knowledge in the form of consultancy, feasibility studies and customer specific developments.
Magnetic Innovations specializes in the design of custom magnetic systems, actuators, drives and magnetic shielding. It is obvious that a multidisciplinary approach is used which guarantees a well-integrated design that excels by its feasibility, efficiency, size and cost.
Based on our expertise and market knowledge we have developed a number of innovative products which were included in our standard product range.
Independent of production facilities we will ensure that the design and manufacturing of our products meets the highest standards. Each consideration is evaluated without reliance on theoretical formulas that are imprecise. The material included is Perfection Annealed and will not require re-annealing unless severe forming or heli-arc welding is performed. Typically, a sensitive electronic component requires magnetic shielding protection from nearby transformers or power supplies radiating a potentially troublesome magnetic field.
Shielding shapes include simple sheet metal cylinders, complex weldments, and precision machined housings. A simple cylindrical shape is often the most effective shield and the simplest to fabricate.
Complex assemblies can be fusion welded (Figure 2) or spot welded or can be attached with mechanical fasteners.
The inert gas used is argon, and it serves to prevent oxidation and carburization of the material for the brief time it is in a molten state. Usually a part is developed in a flat pattern layout, which can then be laser machined or punched in a CNC punch press. Metal spinning, as the name implies, involves rotating the material in a lathe and using a forming role to flow the metal against a mandrel. The hydroform pushes the tool into a rubber diaphragm behind which hydraulic pressure forces the sheet metal to wrap around the tool. Most trimming operations can be accomplished on laser, milling, or shell trimming machinery. Cold working and machining will have rendered the grain structure of the material in a less than ideal shielding condition. The shield designer should strive to minimize welded sections and to allow generous forming radii. Also any discussion about the environment, global warming, and other related topics are welcome here. In my testing with a single bike wheel I've found that some strange things happen when using a flimsy material for my stater arm. I'm thinking that a pulse in attraction or repulsion might cause a stretch in the rubber acting as energy storage to possibly snap through sticky spot. For static or slowly varying magnetic fields (below about 100 kHz) Faraday shielding is ineffective. MgB2 can superconduct at 10 kelvin, or -263 degrees Celsius, which removes the need for liquid-helium cooling as this temperature is comparable with that of deep space. Magnetic fields with 10 tesla and 10 meters thickness could deflect about 93% of the radiation. We can deliver a turn-key project with a prototype including amplifier module and customer-specific control. The focus aims at understanding the specific needs and requirements of the customer on which, for example through a concept study, the best concept is chosen.
We have production facilities in Eastern Europe and the far East, depending on specific product requirements and series quantities. The Lab Kit permits magnetic shields to be designed and modified until required performance is obtained. High permeability material is best heat treated in a dry hydrogen atmosphere, or vacuum furnace. They will need to be weak attraction magnets, just enough to overcome the repulsion of the other magnets.

Only the two magnet rotors were geared together with large spurr gears slightly larger than the rotors. If I hold stater loosely and allow it to shake & twist slightly in my hand it seems to want to maintain RPMs for a short time, after being spun up by hand and hopefully coordinating the whole process. By adding CO-NETIC and NETIC layers until desired attenuation is achieved, minimum material requirements can be determined. Since magnetic flux will follow the path of least reluctance, the high permeability of the enclosure shape absorbs and shunts the magnetic flux, leaving the inside of the enclosure with a lower or attenuated magnetic field. The mechanical forming constraints of high permeability alloys are very similar to those of stainless steel. High permeability alloys weld quite well, and demanding mechanical tolerances can be achieved with proper weld fixturing.
The mandrel is a machined tool made to conform to the inside profile of the desired finished sheet metal part. Hydroform tools are made from tool steels and other materials such as kirksite, a zinc alloy that can be cast into unique shapes (Figure 7). It seems as tho the flux rather enjoys being pulsed or at least given some freedom to move, possibly attempting to set up it's own resonance? The best shape for magnetic shields is thus a closed container surrounding the shielded volume. Permeability is defined as a ratio of the flux induced in a material (expressed as B, measured in Gauss) proportional to the ambient or applied magnetic field (expressed as H, measured in Oersted).
The shield enclosure can also work the other way by containing a magnetic field within the enclosure boundary.
The resultant diameter of the finished cylinder is determined by the position of the forming roll relative to the pinching rolls. In high volume applications, tooling can be designed that will pre-cut and form the blank in a single operation. Since spherical shells are difficult and costly to form, the next best design is a simple cylinder. As a reference, the initial permeability of a material is defined as the ratio of the induced flux B in the material divided by the ambient Earth’s magnetic field, H (approximately .50 Oersted).
After the cylinder is roll formed to shape, the seam can be overlapped and spot welded or butted and fusion welded. Rectangular boxes and chassis, although not optimal, will perform adequately as magnetic shields. A large, well ordered grain will yield maximum permeability resulting in optimum shielding (Figure 8). The simple B-H Graph shown in Figure 1 is used to determine a material’s permeability and resultant magnetic shielding performance. Often the metal will require in-process annealing to relieve mechanical stress, and additional spinning can then occur.
Unlike RFI shields where holes and apertures are discouraged, magnetic shields can have holes and openings although it’s best to minimize their number. The orange line on the B-H Graph represents the function of high permeability material at DC and 60 Hz. In recent years, FEA (finite element analysis) modeling of magnetic shield designs has recently become very helpful and has aided in the design process described here. The advantage of spinning is low tooling costs as mandrels are often made from wood or aluminum. Since the proof is in the prototype and since so many extenuating circumstances can affect shield performance, it’s best to try one on for form, fit, and function first. Note that as the applied field increases beyond the steepest slope, the permeability starts to decrease. Once the material becomes fully saturated, it offers no magnetic shielding protection as the derivative asymptotically approaches zero.

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