Abstract Permanent magnet (PM) machines have become prevalent in very high-speed applications due to its simple structure and high power density. Permanent magnets is the most mechanically vulnerable rotor part, and can not withstand the large centrifugal forces during high-speed rotation. Therefore, the magnet must be contained in a non-magnetic enclosure shrink-fitted onto the PM, which would limit stresses in the magnet and ensure the transfer of torque from the magnet to the shaft at elevated speeds. The strength analysis methods of enclosure for high-speed PM rotor by means of analytical method as well as finite element non-linear contact analysis are introduced. As an example, the strength analysis results for a high speed PM rotor at speed of 60000r/min are presented. The analysis results show that the theoretical calculation value meet the requirements of protecting the permanent magnet in high rotation speed.
[1]
J.W. Kolar,et al.
Design of a 100 W, 500000 rpm permanent-magnet generator for mesoscale gas turbines
,
2005,
Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..
[2]
A. Binder,et al.
Fixation of buried and surface-mounted magnets in high-speed permanent-magnet synchronous machines
,
2005,
IEEE Transactions on Industry Applications.
[3]
A. Ugural,et al.
Advanced strength and applied elasticity
,
1981
.
[4]
Kay Hameyer,et al.
Rotor design of a high-speed Permanent Magnet Synchronous Machine rating 100,000 rpm at 10kW
,
2010,
2010 IEEE Energy Conversion Congress and Exposition.
[5]
René Larsonneur,et al.
Design and control of active magnetic bearing systems for high speed rotation
,
1990
.