Magnetic bearing with reduced control-flux-induced rotor loss

Details Magnetic bearing with reduced control-flux-induced rotor loss Magnetic bearing with reduced control-flux-induced rotor loss

F - Mech Eng,Light,Heat,Weapons

16

C

F16C 39/06 (2006.01) H02K 7/09 (2006.01)

Patent

CA 2226663

A magnetic bearing with reduced control-flux-induced rotor loss includes a rotor (14), and a stator (12) having a plurality of slots (S1-S16) around which coils (150-156) of a first Phase A and coils (160-166) of a second Phase B are wound. The winding configuration provides a two pole magnetic field around a rotor/stator gap (15) which is sinusoidal and which can be directed to any location along the gap (15). The configuration minimizes discontinuities or sharp changes in control flux in the gap which thereby reduces rotor losses. Also, the stator tooth gap (g1) is minimized to provide smooth flux distribution along the rotor/stator gap (15). More phases and more or less stator slots may be used.

Palier magnétique présentant des pertes limitées au niveau du rotor provoquées par le flux de commande et comprenant un rotor (14), ainsi qu'un stator (12) possédant une pluralité d'encoches (S1-S16) autour desquelles sont enroulées des bobines (150-156) d'une première phase A et des bobines (160-166) d'une deuxième phase B. La configuration de l'enroulement crée un champ magnétique bipolaire autour d'un entrefer rotor/stator (15), qui est sinusoïdal et peut être dirigé vers tout emplacement situé le long de l'entrefer (15). Cette configuration limite au maximum les discontinuités ou les modifications brutales du flux de commande dans l'entrefer, ce qui, par conséquent, limite les pertes au niveau du rotor. L'entrefer (g1) entre les dents du stator est également diminué au maximum, de manière à répartir régulièrement le flux le long de l'entrefer rotor/stator (15). On peut utiliser davantage de phases et plus ou moins d'encoches de stator.

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