Mechanical and electromechanical arrangements for field-weakening of an electric machine that utilizes permanent magnets
AssigneeTula eTechnology, Inc.
InventorMd. Zakirul Islam
Life of this patent
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Abstract
Methods, systems, and mechanical and electromechanical arrangements for field-weakening of an electric machine that utilizes permanent magnets are disclosed herein. One rotor assembly for an electric motor includes a rotor body that moves with respect to a central axis, the rotor body having a core and a number of permanent magnets that move with the rotor body, and the rotor body also having a number of movable field-weakening magnetic materials that move with respect to the permanent magnets and to the central axis.
Claims20
A rotor assembly for an electric machine, comprising:
- a rotor body that moves with respect to a central axis, the rotor body having a core and a number of permanent magnets that move with the rotor body, and the rotor body also having a number of movable field-weakening magnetic materials that move with respect to the permanent magnets and to the central axis, wherein each of the movable field-weakening magnetic materials has a magnetic material proximate to one end of the movable field-weakening magnetic materials and wherein each of the movable field-weakening magnetic materials is actuated by centrifugal force and a magnetic mechanism provided by the magnetic material proximate the one end to move its associated movable field-weakening magnetic material with respect to the central axis.
A rotor assembly for an electric machine, comprising:
- a rotor body that rotates around a central axis, the rotor body having a core and a number of permanent magnets that rotate with the rotor body at a fixed distance from the central axis, and the rotor body also having a number of movable field-weakening magnetic materials that move with respect to their distance to the central axis, wherein the rotor assembly includes a field-weakening component provided adjacent one end of the rotor, the field-weakening component including a movable field-weakening magnetic material chamber formed therein, and the movable field-weakening magnetic material chamber having an electromagnet proximate to one end of the movable field-weakening magnetic material chamber.
An electric machine, comprising:
- a stator having a plurality of electromagnets generating a magnetic field, wherein the electromagnets are arranged around a central axis;
- and
- a rotor assembly having a rotor body that rotates around a central axis, the rotor body having a number of permanent magnets that rotate with the rotor at a fixed distance from a central axis, and the rotor body also having a number of movable field-weakening magnetic materials that move with respect to the central axis, wherein each of the movable field-weakening magnetic materials has a magnetic material proximate to one end of the movable field-weakening magnetic materials and wherein each of the movable field-weakening magnetic materials is actuated by centrifugal force and a magnetic mechanism provided by the magnetic material proximate the one end to move its associated movable field-weakening magnetic material with respect to the central axis.
A rotor assembly for an electric machine, comprising:
- a rotor body that moves with respect to a central axis, the rotor body having a core and a number of permanent magnets that move with the rotor body, and the rotor body also having a number of movable field-weakening magnetic materials that move with respect to the permanent magnets and to the central axis, wherein each of the movable field-weakening magnetic materials has a magnetic material proximate to one end of the movable field-weakening magnetic materials;
- and
- each of the movable field-weakening magnetic materials is actuated by centrifugal force and a magnetic mechanism provided by the magnetic material proximate the one end to move its associated movable field-weakening magnetic material with respect to the central axis.
Dependencies are inferred from the claim text.