Rotor lamination for an ac permanent magnet synchronous motor

Details Rotor lamination for an ac permanent magnet synchronous motor Rotor lamination for an ac permanent magnet synchronous motor

H - Electricity

02

K

H02K 21/14 (2006.01) H02K 1/06 (2006.01) H02K 1/27 (2006.01) H02K 21/46 (2006.01)

Patent

CA 2051752

A high-speed rotor for an AC permanent magnet synchro- nous motor includes a stack of magnetically permeable rotor laminations. Each rotor lamination comprises a plurality of conductive bar slots for holding a starter winding and hav- ing openings facing outside for minimizing the flux leakage from the rotation magnetic field produced by primary wind- ings on the stator, and magnet slots for holding permanent magnets to produce an even number of magnetic poles on the periphery of the rotor. The lamination further includes a plurality of flux barrier slots connected to the magnet slots for minimizing the flux leakage from the permanent magnets and forming bridges in a ring configuration between the conductive bar slots and the barrier slots so that the integrality of the lamination is very much enhanced, while the power loss is minimized.

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