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US 12,587,064 B2Granted
Electric motor system, turbo compressor, and refrigeration device
AssigneeDaikin Industries, Ltd.
InventorsYusuke Irino, Yuu Fu, Yuji Nakazawa
Life of this patent
Estimating the term…
Abstract
An electric motor system includes a drive shaft configured to rotationally drive a load, a bearingless motor and a radial magnetic bearing arranged side by side in an axial direction of the drive shaft, and a thrust magnetic bearing disposed between the bearingless motor and the radial magnetic bearing. A radial load on the drive shaft is supported in a non-contact manner by the bearingless motor and the radial magnetic bearing.
Claims16
An electric motor system comprising:
- a drive shaft configured to rotationally drive a load;
- and
- a bearingless motor and a radial magnetic bearing arranged side by side in an axial direction of the drive shaft,
- a radial load on the drive shaft being supported in a non-contact manner by the bearingless motor and the radial magnetic bearing;
- the radial magnetic bearing being disposed between the bearingless motor and the load,
- a thrust magnetic bearing disposed between the bearingless motor and the radial magnetic bearing,
- no other radial magnetic bearing being disposed opposite to the radial magnetic bearing as viewed from the bearingless motor.
4 more elements
An electric motor system comprising:
- a drive shaft configured to rotationally drive a load;
- and
- a motor disposed on the drive shaft;
- a first radial magnetic bearing and a second radial magnetic bearing disposed closer to the load and opposite to the load, respectively, with respect to the motor sandwiched between the first radial magnetic bearing and the second radial magnetic bearing along an axial direction of the drive shaft;
- a first thrust magnetic bearing disposed closer to the motor as viewed from the second radial magnetic bearing;
- and
- a second thrust magnetic bearing disposed opposite to the motor as viewed from the second radial magnetic bearing,
- a radial load on the drive shaft being supported in a non-contact manner by the first and second radial magnetic bearings,
- the first radial magnetic bearing being disposed between the load and the motor, and
- only the first thrust magnetic bearing being disposed, as a thrust magnetic bearing between the first and second radial magnetic bearings.
7 more elements
Dependencies are inferred from the claim text.