Bearingless motor
AssigneeMitsubishi Electric Corporation
InventorsMasahito MIYOSHI, Yusuke SAKAMOTO, Shinichi FURUTANI
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Abstract
A bearingless motor includes a rotor, a stator for applying support force and torque to the rotor, and a first displacement sensor and a second displacement sensor for detecting a radial position of the rotor. The stator includes a motor winding for generating a magnetic flux having p poles to produce the torque, and a support winding for generating a magnetic flux having p±2 poles or two poles to produce the support force. The first displacement sensor and the second displacement sensor are disposed at positions axially different from each other.
Claims12
A bearingless motor of a two-axis control type comprising:
- a rotor;
- a stator for applying support force and torque to the rotor;
- and
- a first displacement sensor and a second displacement sensor to detect a radial position of the rotor,
- wherein
- the stator includes
- a motor winding to generate a magnetic flux having p poles to produce the torque, and
- a support winding to generate a magnetic flux having p±2 poles or two poles to produce the support force,
- at least part of a magnetic circuit having the magnetic flux having p poles for producing the torque and at least part of a magnetic circuit having the magnetic flux having p±2 poles or two poles for producing the support force are common to each other,
- the support force is produced by superimposition of the magnetic flux having p±2 poles or two poles on the magnetic flux having p poles,
- p representing a natural number, and
- the first displacement sensor and the second displacement sensor are disposed at positions axially different from each other.
2-7. (canceled)
Dependencies are inferred from the claim text.