As we know the Hiperco materials are being used for Machine Design. Specifically when we go for Permanent Magnet Synchronous Machines and PMBLDC Machines.
Yeah acoording to me one of the cause is that it reduces the weight of motor. But at the same time we can also use some other materials which will provide the same size.
Why we use Hiperco. Is it having better properties and what are the effect of using these materials on cost and performance as compared to other materials.
Hello Tanuj,
I wouldn't say Hiperco is a weight gain per se as its mass density is more or less comparable to electrical steel (even worse when reading 8120 kg/m3 for Carpenter Hiperco 50 http://www.polarislaserlaminations.com/Hiperco50.pdf)
Though, you might consider it this way by considering you would put less of this material to design your motor since its main property is to have a high saturation flux density.
Here is an interesting and easy-to-read comparison of FeSi steel vs Hiperco on the design of an electric machine, with exact same dimensions. Due to higher magnetic saturation in stator core, the torque constant could be increased.
http://shodhganga.inflibnet.ac.in/bitstream/10603/16150/12/12_chapter%207.pdf
Note that thickness of Hiperco can be comparable to Cogent NO10-12-18-20 series and their iron losses seem to be in the same range. To be double checked but from what I read NO005 (0.127 mm) // 60Hz-1T 1.54 W/lb // 400Hz-1T 5.05 W/kg, http://www.polarislaserlaminations.com/Cogent.pdf and it is comparable to what you can read from Hiperco50 pdf I linked (first link) for same size.
Drawbacks you asked? The cost of course. This isn't a standard material, and uses a lot of Cobalt.
Have a good day,
Guillaume
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