| Abstract |
Since modem power-electronics offer the chance to exceed the speed of three phase motors above 3000 rpm there is an interesting field of application for magnetic bearings. They have no wear, no lubricants, lower rate of losses, adjustable stiffness, reduced requirements for balancing and there is the possibility for diagnostic of the revolving shaft. Therefore there are now many activities for the application of magnetic bearings. Speed range of 80000 till even 120000 rpm for small sized machines are as well under consideration as motors of several Megawatts with speed in the range of 9000 till 15000 rpm. |
