Sensorless electric machine
First Claim
1. A rotor component comprising:
- a rotor core including a plurality of rotor core laminations with a plurality of openings;
a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; and
at least two rotor bars inserted into the remaining opening of at each end of the permanent magnet and connected at each end by a connection element so as to define a conductive loop, wherein at least one rotor bar from adjacent conductive loops are co-located in the same opening of the plurality of openings so as to define a shifted-cage configuration.
2 Assignments
0 Petitions
Accused Products
Abstract
An electric machine that includes a rotor core made of magnetic steel; a stator configured with stationary windings therein; openings disposed within or on the rotor core; and a rotor circuit that is configured to introduce saliency based on an orientation of part of the rotor circuit in relationship to a pole location of the electric machine, where the rotor circuit is made of a conductive, non-magnetic material. A rotor component and various embodiments of electric machines are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
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Citations
23 Claims
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1. A rotor component comprising:
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a rotor core including a plurality of rotor core laminations with a plurality of openings; a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; and at least two rotor bars inserted into the remaining opening of at each end of the permanent magnet and connected at each end by a connection element so as to define a conductive loop, wherein at least one rotor bar from adjacent conductive loops are co-located in the same opening of the plurality of openings so as to define a shifted-cage configuration.
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2. An electric machine comprising:
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a rotor core comprising magnetic steel and including a plurality of rotor core laminations with a plurality of openings; a stator configured with a plurality of stationary windings therein; a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; a rotatable shaft inserted through the rotor core; and a rotor circuit including a plurality of rotor connectors inserted into the remaining opening of at each end of the permanent magnet and connected by a plurality of connection elements and configured to introduce saliency based on an orientation of a portion of the rotor circuit in relationship to a pole location of the electric machine, said rotor circuit made of a conductive, non-magnetic material, wherein a midpoint of the rotor circuit substantially aligns with a d-axis of the electric machine. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An electric machine comprising:
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a rotor core including a plurality of rotor core laminations with a plurality of openings; a stator configured with a plurality of stationary windings therein; a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; a rotatable shaft inserted through the rotor core; and a rotor circuit structure comprising at least one pole circuit defined by a plurality of rotor connectors inserted into the remaining opening of at each end of the permanent magnet and connected by a plurality of connection elements and extending from about a q-axis to about a d-axis of the electric machine.
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22. An electric machine comprising:
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a rotor core including a plurality of rotor core laminations with a plurality of openings; a stator configured with a plurality of stationary windings therein; a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; a rotatable shaft inserted through the rotor core; and a rotor circuit structure comprising at least one loop or ring of a conductive, non-magnetic material, wherein said at least one loop or ring is substantially concentric about a d-axis of the electric machine and defined by a plurality of rotor connectors inserted into the remaining opening of at each end of the permanent magnet and connected by a plurality of connection elements.
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23. An interior permanent magnet (IPM) machine comprising:
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a rotor core including a plurality of rotor core laminations with a plurality of openings; a permanent magnet disposed in each of the plurality of openings in such a way so as to define a remaining opening at each end of the permanent magnet; a rotatable shaft inserted through the rotor core; and a rotor circuit configured for use with one of the interior permanent magnet (IPM) machine, the rotor circuit comprising at least one pole circuit defined by a plurality of rotor connectors inserted into the remaining opening of at each end of the permanent magnet and connected by a plurality of connection elements, wherein a midpoint of the rotor circuit substantially aligns with a d-axis of the electric machine.
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Specification