| 摘要 |
A permanently-excited synchronous machine ( 51 ), comprises a stator ( 53 ) and a rotor ( 55 ), the stator ( 53 ) preferably comprising a three-phase alternating current winding and the rotor ( 55 ) permanent magnets ( 57 ). The stator ( 53 ) has 21 grooves ( 1 - 21 ) and the rotor ( 55 ) four magnetic poles ( 39 ). The grooves of the stator ( 53 ) are wound such that a first harmonic is suppressed by a winding pattern and a second harmonic suppressed by magnet geometry.
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