In reply to Hoyt A. Stearns Jr.'s message of Fri, 6 Feb 2009 18:34:53 -0700: Hi,
If I'm not mistaken, thermal energy is used to randomize magnetic domains. Therefore one might conclude that if Sv were the operative characteristic, then any excess energy appearing in the motor would come at the cost of temperature, and the motor should get cold in operation. >Induced currents are always lossy, that's not what is meant. Magnetic >Viscosity ( Sv ) is a property of magnetic materials to delay the change in >induced flux ( M or B ) from applied magnetizing force ( H ) due to the time >it takes for domains to rotate. Sv also delays the return of B when H is >removed. It's on the order of 1 millisecond for NeFeBo, but can vary from >near zero to seconds depending on the material. [snip] Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
