Power Inductive Components
Chokes, Reactors, and Transformers
MAGMENT power inductors and transformers are based on a disruptive technology for both a novel material and an innovative magnetic design. The material is a concrete with magnetizable grains embedded in a cement matrix in a pressureless process. Its features are high DC-bias capability and low losses as well as very high linearity, thermal conductivity and mechanical robustness. This allows to design rugged inductive components with a distributed air gap for minimized eddy current losses by completely surrounding the coil by the MAGMENT material. This ensures a complete magnetic filling of the available volume within the aluminum housing yielding maximum performance and cooling. As compared to the conventional manufacturing of winding cores and sealing with a potting material, our “wind and magnetic pour” process goes along with full shape and size flexibility, no tooling required. This allows to both customize components to any given space constraints and to minimize total material cost by a special magnetic design algorithm yielding lowest price as compared to conventional inductors. All component manufacturing process steps are under one roof ensuring quickest turnaround time from design-in to shipping.
Please complete the Product Request Form to receive a design proposal and quote.
Magnetic Cement Concrete (MC)
Composite material based on a special cement matrix loaded with magnetizable particles having a suitable size distribution.
These material grades can reach initial permeabilities up to 60, which opens up a very broad range of electromagnetic applications .
Main advantage is full integrability into any cement-based structure maintaining a high degree of robustness.
Also, cement as a binder allows to make rigid and mechanically rugged inductive components with high stability to environmental influences.
MC material grades feature a prolonged lifetime.
Magnetic Asphalt Concrete (MA)
Composite material based on a special bitumen matrix loaded with magnetizable particles having a suitable size distribution.
These material grades can reach initial permeabilities up to 40, allowing specially to be integrated in asphalt roads, driveways and parking lots for wireless power transmission and related applications.
Asphalt is inherently cheaper than concrete and is the material of choice for cold climates, noise-reduced and easy to repair roads.
In the course of integrating inductive systems on either asphalt or concrete streets,
MAGMENT MA grade allows crack-free and quick magnetic patching.
Material Processing Technology
Attaining high particle loads and permeabilities as demanded by most of the applications does not involve any pressing processes.
This stunning fact is a main and outstanding feature of our concrete materials offering manifold possibilities
for cost-efficient and size-unlimited implementations.
Moreover our processes are capable of using recycled magnetic materials making this an even more attractive albeit sustainable technology.
Our material grades are fully characterized to the highest standards pertaining electromagnetic, mechanical, rheological and thermal parameters. Please check our datasheets
They are sold as premixed concrete requiring only the addition of the exact amount of water for the reasons described below.
Adding Water Sets Off a Chemical Reaction
by Mark Miodownik
(Reproduced by very kind permission of the author)
“…If you now add water to this powder it sucks it up with ease and darkens. But instead of forming a slushy mud, which is what happens if you add water to most powdered rock, a series of chemical reactions takes place to form a gel. Gels are semisolid and wobbly types of matter – the jelly served at children’s parties is a gel, and so too is a lot of toothpaste. It doesn’t slosh around like a liquid because it has an internal skeleton that prevents the liquid moving. In the case of jelly this is created by the gelatin. In the case of cement, the skeleton is made up of calcium silicate hydrate fibrils, which are crystal-like entities that grow from the calcium and silicate molecules, now dissolved in the water, in a way that appears almost organic. So the gel that forms inside cement is constantly changing as the solid internal skeleton grows and further chemical reactions take place.”
“…As with any chemical reaction, if you get the ratio of the ingredients wrong, then you get a mess. In the case of concrete, if you add too much water there won’t be enough calcium silicate from the cement powder to react with, and so water will be left over within the structure, which makes it weak.
Similarly, if you add too little water there will be unreacted cement left over, which again weakens the structure. It is usually human error of this sort that proves the undoing of concrete. Such poor concrete can go undiscovered but then lead to catastrophe many years after the builders have departed.”