Rotor structure for a fault-tolerant permanent magnet electromotive machine and corresponding method

摘要

A rotor structure (24) for a permanent magnet electromotive machine (10) is provided. A back-core lamination (28) is disposed around a plurality of permanent magnets (30). The back-core lamination (28) comprises a plurality of high-reluctance regions (50) arranged to attenuate asynchronous magnetic flux components while avoiding synchronous magnetic flux components. The asynchronous and synchronous magnetic flux components result from spatial harmonic components of a plurality of fractional-slot concentrated windings (18) of a stator (12) of the machine.