It is now possible with ferromagnetic material systems combined with new electrical machine design principles to break new ground in the area of automotive magnetic applications. Depending on the application, the material system can be engineered to meet the specific requirements or processing constraints. For instance, parts with very similar magnetic properties (induction, permeability, core loss at low to medium frequencies) can be obtained from different formulations of composite materials. They are all composed of a high purity iron powder which contains a unique resin binder and/or proprietary lubricant. They differ in the processing at the press (external versus internal lubrication) and at the curing step. They differ also in the level of mechanical strength they can yield. Furthermore, by modifying the manufacturing process and decreasing the iron particle size in order to increase the electrical resistivity, high frequency materials can be used to produce parts with low core loss at frequencies up to 1 MHz. In the future, motor designers using these new materials, will provide the automotive community with lower cost and more efficient accessory motors as well as other electrical devices. The use of such dielectro-magnetics offers new opportunities to reduce cost, reduce the number of parts per component and increase design flexibility.
Insulated iron powders for automotive applications
Isolierte Eisenpulver für den Automobilbau
2003
6 Seiten, 8 Bilder, 1 Tabelle, 13 Quellen
Aufsatz (Konferenz)
Englisch
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