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US 12,719,332 B2Granted
Back-yokeless magnetic-bearing-integrated motor
AssigneeGachon University of Industry-Academic Cooperation Foundation
InventorsIn-Jun Yang, Seong Hyeon Go, Won-Ho Kim, Kwang-Soo Kim, Dong-Hoon Jung, Seung-Hyeon Lee
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Abstract
The following disclosure relates to a back yokeless magnetic bearing-integrated motor, and in particular, to a back yokeless magnetic bearing-integrated motor in which a back yoke is eliminated in a permanent magnet motor and a magnetic bearing is installed inside a rotor, thereby integrating the magnetic bearing with a motor.
Claims14
A back yokeless magnetic bearing-integrated motor comprising:
- a stator module including a cylindrical stator core around which a stator winding is wound;
- a rotor module provided inside the stator module and including a permanent magnet module including a hollow shaft having an internal space and a plurality of permanent magnets provided on an outer surface of the hollow shaft;
- and
- a magnetic bearing module provided inside the hollow shaft and levitating the hollow shaft in a radial direction from a center,
- wherein the plurality of permanent magnets are arranged in a Halbach array.
2 more elements
A back yokeless magnetic bearing-integrated outer rotor-type motor, comprising:
- a stator module including a cylindrical stator core around which a stator winding is wound;
- a rotor module surrounding the stator module and including a permanent magnet module including a plurality of permanent magnets and a hollow shaft in which the permanent magnet module is fixed to an inner surface thereof;
- and
- a magnetic bearing module surrounding the hollow shaft and levitating the rotor module in a central direction,
- wherein the plurality of permanent magnets are arranged in a Halbach array;
- and
- wherein the hollow shaft includes
- a first layer provided on the magnetic bearing module side and a second layer provided below the first layer and on the permanent magnetic module side, and
- a relative magnetic permeability of a material forming the second layer is less than a relative magnetic permeability of a material forming the first layer.
6 more elements
Dependencies are inferred from the claim text.