| 摘要 |
A rotatable assembly that includes a plurality of permanent magnets and a rotor core is described. The rotor core includes a first end, a second end, and at least one inner wall that defines a permanent magnet opening configured to receive at least one permanent magnet of the plurality of permanent magnets. The rotor core further includes at least one bridge positioned between permanent magnet openings, wherein at least a first permanent magnet and a second permanent magnet of the plurality of permanent magnets generates a first rotor pole of a plurality of rotor poles.
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