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High-Speed Drives With Permanent-Magnet Machines And Active Magnetic Bearings
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| Author(s) |
A. Binder, M. Klohr, T. Lu, W. Hackmann |
| Abstract |
Permanent magnet technology allowed – together
with advances in glass and carbon fiber shell development –
design of high-speed drives with surface mounted magnets. Use
of double-layer pitched winding, leading to flux distribution
with small field harmonics, and low loss sheets result in low
additional losses at high speed and sine wave supply. Inverter
supply needs filtering to keep additional losses low. Stator
water-jacket cooling contributes to compact motor design.
Compared with high-speed copper cage induction motors the
PM synchronous machines are superior in power density, lower
losses and winding temperature. Measured results on
24000/min, 30 kW, induction and PM machines with grease
lubricated spindle bearings are presented along with
magnetically levitated 40000/min, 40 kW PM prototype
machines. Magnetic bearings allow raising of speed and offer
additional functionality such as active imbalance compensation. |
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| Filename: | A16691 |
| Filesize: | 889.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-16 by System |
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