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US 6,975,055 B2Granted
Dynamo-electric machine having a rotor with first and second axially or rotationally displaceable field magnets
AssigneeHitachi, Ltd.
InventorsKim Houng Joong, Shigeta Ueda
Life of this patent
Estimating the term…
Abstract
A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction. The machine further has a mechanism for shifting the first and the second field magnets in axial and rotation directions.
Claims19
A dynamo-electric machine comprising:
- a stator having a winding, and
- a rotor having first and second field magnets, which have different, magnetic poles and which are arranged sequentially and alternately on a rotating shaft in a rotation direction, the first and second field magnets being opposed to the magnetic poles of said stator,
- wherein said first and second field magnets displace in an axial or the rotation direction of the rotating shaft according to the magnetic action force of said first and second field magnets and the direction of the torque generated in said rotor, and
- wherein in response to a first rotational direction and in response to an opposite rotational direction of said rotor, one of said first and said second field magnets displace in an axial direction of said rotating shaft and in a rotational direction while another of said first and said second field magnets is fixed, under a condition where said another of said first and said second field magnets is held on said rotating shaft.
1 more element
A dynamo-electric machine comprising:
- a stator having a winding, and
- a rotor having first and second field magnets, which have different, magnetic poles and which are arranged sequentially and alternately on a rotating shaft in a rotation direction, the first and second field magnets being opposed to the magnetic poles of said stator,
- wherein said first and second field magnets are arranged at both ends of a third field magnet fixed on said shaft displace in an axial or the rotation direction of the rotating shaft according to the magnetic action force of said first and second field magnets and the direction of the torque generated in said rotor, and
- wherein in response to a rotational direction of said rotor, one of said first and said second field magnets displace in an axial direction of said rotating shaft and in a rotational direction while another of said first and said second field magnets and said third filed magnet is fixed, under a condition where said another of said first and said second field magnets is held on said rotating shaft.
1 more element
Dependencies are inferred from the claim text.