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US 7,459,821 B2Granted
Permanent magnet assisted synRM and method for imposing magnetic force thereon
AssigneeLG Electronics Inc.
InventorsDal Ho Cheong, Kyung Hoon Lee, Hyun Hun Shin, June Hee Won, Jae Yoon Oh, Gil Su Lee
Life of this patent
Estimating the term…
Abstract
A PMA (Permanent Magnet Assisted) synRM and a method for imposing a magnetic force thereon. Magnets are inserted into outer flux barriers of a plurality of flux barriers formed along the radius of a rotor, and bridges or slim portions are formed on inner flux barriers at positions corresponding to the positions of the magnets so that the magnetic force is imposed on the magnets through coils. Since the number of the flux barriers is sufficiently increased while the amount of the magnets consumed is decreased, the PMA synRM has increased efficiency and reduced production costs.
Claims12
A permanent magnet assisted synchronous reluctance motor, comprising;
- a stator, on which coils are wound;
- a rotor rotatably installed within the stator;
- a plurality of flux barriers comprising outer flux barriers formed in outer portions of the rotor and inner flux barriers formed in inner portions of the rotor, wherein the outer flux barriers and inner flux barriers are formed along a radius of the rotor, wherein centers of the inner flux barriers are provided radially inward of centers of the outer flux barriers with respect to a central axis of the rotor;
- magnets inserted within corresponding outer openings defined by the outer flux barriers;
- and
- bridges are formed which traverse corresponding inner openings defined by inner flux barriers so that corresponding routes for magnetic flux are formed extending between opposing magnets inserted in the outer openings when the coil imposes a magnetic force on the magnets,
- wherein the magnets are inserted within first and second sides of each of the outer flux barriers, and the bridges are provided at first and second sides of each of the inner flux barriers at positions corresponding to the positions of the magnets, and
- wherein center portions of the outer flux barriers are empty, and
- wherein all the space of the inner flux barriers, excluding the bridges, are empty.
6 more elements
The A permanent magnet assisted synchronous reluctance motor comprising,
- a stator, on which coils are wound;
- a rotor rotatably installed within the stator;
- a plurality of flux barriers comprising outer flux barriers formed in outer portions of the rotor and inner flux barriers formed in inner portions of the rotor, wherein the outer flux barriers and inner flux barriers are formed along a radius of the rotor, wherein centers of the inner flux barriers are provided radially inward of centers of the outer flux barriers with respect to a central axis of the rotor;
- magnets inserted within corresponding outer openings defined by the outer flux barriers;
- and
- bridges are formed which traverse corresponding inner openings defined by inner flux barriers so that corresponding routes for magnetic flux are formed extending between opposing magnets inserted in the outer openings when the coil imposes a magnetic force on the magnets,
- wherein the magnets are formed at the centers of the outer flux barriers, and the bridges are positioned at the centers of the inner flux barriers at positions corresponding to the positions of the magnets,
- wherein sides of the outer flux barriers are empty, and
- wherein all the space of the inner flux barriers, excluding the bridges, are empty.
6 more elements
A permanent magnet assisted synchronous reluctance motor, comprising;
- a stator having coils wound thereon;
- a rotor rotatably installed on the inside of the stator;
- and
- a plurality of flux barriers formed in the rotor and spaced apart from each other by a predetermined distance in a direction of a radius of the rotor, the plurality of flux barriers including outer flux barriers and inner flux barriers,
- wherein the inner flux barriers are formed to surround the outer flux barriers, the inner flux barriers being positioned closer to a center of the rotor than the outer flux barriers,
- wherein a magnet is inserted within a corresponding opening defined by at least one of the outer flux barriers, and a bridge is formed traversing a corresponding opening defined by at least one of the inner flux barriers at positions corresponding to the positions of the magnet such that a route of a magnetic flux is formed when a magnetic force is imposed on the magnets
- wherein the magnets are inserted within first and second sides of each of the outer flux barriers, and the bridges are provided at first and second sides of each of the inner flux barriers at positions corresponding to the positions of the magnets, and
- wherein center portions of the outer flux barriers are empty, and
- wherein all the space of the inner flux barriers, excluding the bridges. are empty.
6 more elements
Dependencies are inferred from the claim text.