Permanent magnet motor with field weakening arrangement
AssigneeVolvo Car Corporation
InventorRaik Orbay
Life of this patent
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Abstract
The invention relates to a permanent magnet motor, comprising: a stator configured for generating a time-varying magnetic field; a rotor, arranged inside of the stator, comprising at least one permanent magnet providing a constant magnetic field; the permanent magnet being made of a flexible material; the stator being configured for rotating the rotor by taking along the constant magnetic field of the rotor with the time-varying magnetic field of the stator; the rotor comprising a field weakening mechanical arrangement configured for weakening a flux of the permanent magnet motor; the field weakening mechanical arrangement supporting the permanent magnet and comprising a recess configured for allowing the permanent magnet to be deformed by a centrifugal force provided by the rotation of the rotor.
Claims20
A permanent magnet motor, comprising:
- a stator configured for generating a time-varying magnetic field;
- and
- a rotor arranged inside of the stator, comprising a permanent magnet unit providing a constant magnetic field;
- wherein the permanent magnet unit is made of a flexible material,
- wherein the stator is configured for rotating the rotor by taking along the constant magnetic field of the rotor with the time-varying magnetic field of the stator, and
- wherein the rotor comprises a field weakening mechanical arrangement configured for weakening a flux of the permanent magnet motor, and the field weakening mechanical arrangement supports the permanent magnet unit, and the rotor further comprises a recess configured for allowing only a portion of the permanent magnet unit to be deformed into the recess by a centrifugal force provided by the rotation of the rotor.
A rotor for a permanent magnet motor, the rotor comprising:
- a permanent magnet unit providing a constant magnetic field, wherein the permanent magnet unit is made of a flexible material;
- and
- a field weakening mechanical arrangement configured for weakening a flux of the permanent magnet motor, wherein the field weakening mechanical arrangement supports the permanent magnet unit, and comprises a recess configured for allowing only a portion of the permanent magnet unit to be deformed into the recess by a centrifugal force provided by the rotation of the rotor, wherein the rotor is arranged inside of a stator configured for generating a time-varying magnetic field, and wherein the stator is configured for rotating the rotor by taking along the constant magnetic field of the rotor with the time-varying magnetic field of the stator.
A field weakening arrangement for a rotor, comprising:
- a recess configured for allowing only a portion of a flexible permanent magnet unit to be deformed into the recess by a centrifugal force provided by rotation of the rotor, wherein the field weakening mechanical arrangement is configured for weakening a flux of the permanent magnet unit, and supports the flexible permanent magnet unit providing a constant magnetic field.
Dependencies are inferred from the claim text.