초록 ▼

A rotor for a permanent magnet machine comprises an even plurality of pole pieces joined together by intermediate nonmagnetic segments to form a hollow cylinder. A plurality of magnets is situated adjacent to the interior portion of the pole pieces, with the magnets defining a central axial opening.

A rotor for a permanent magnet machine comprises an even plurality of pole pieces joined together by intermediate nonmagnetic segments to form a hollow cylinder. A plurality of magnets is situated adjacent to the interior portion of the pole pieces, with the magnets defining a central axial opening. A rotor core has a plurality of saucer shaped elements arranged in a stack situated inside the central opening. Means for providing opposing axial forces to the rotor core tend to flatten the saucer shaped elements and thereby cause radial expansion of the rotor core holding the magnets against the interior of the hollow cylinder.

대표청구항 ▼

A method of assembling a permanent magnet rotor comprising the steps of: forming a hollow cylinder of arcuate shaped pole pieces of magnetic material separated by nonmagnetic segments; placing a plurality of magnets inside said cylinder adjacent to said pole pieces, said magnets defining a central a

A method of assembling a permanent magnet rotor comprising the steps of: forming a hollow cylinder of arcuate shaped pole pieces of magnetic material separated by nonmagnetic segments; placing a plurality of magnets inside said cylinder adjacent to said pole pieces, said magnets defining a central axial opening; placing inside said central axial opening a rotor core having a stack of generally saucer shaped elements; and compressing said rotor core in the axial direction to tend to flatten said saucer shaped elements to cause radial expansion of the rotor core to hold said magnets against the interior of the hollow cylinder