Title:
BEARINGLESS MOTOR CONTROL DEVICE, CONTROL METHOD FOR MOTOR SYSTEM AND BEARINGLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2024/013935
Kind Code:
A1
Abstract:
This bearingles motor control device (30) comprises an observer (32) and a speed estimator (33), the bearingless motor control device controlling a bearingless motor that comprises a rotor, and a stator that has a motor winding that generates torque, the rotor and the stator being arranged with a predetermined gap therebetween. On the basis of a voltage command value of the motor winding or a voltage detection value that is detected from the voltage that is applied to the motor winding, the observer (32) calculates at least one of an estimated electric current that is an estimated value of the electric current that flows in the bearingless motor, and an estimated rotor magnetic flux that is an estimated value of the rotor magnetic flux that is generated in the motor winding by the rotor. The speed estimator (33) receives an input of at least one of an electric current error that is the difference between the estimated electric current and an electric current detection value that is the value of the electric current that flows in the motor winding, and the estimated rotor magnetic flux, and calculates and outputs an estimated axial direction speed that is an estimated value of the axial direction speed of the rotor.
Inventors:
MIYOSHI MASAHITO (JP)
SAKAMOTO YUSUKE (JP)
FURUTANI SHINICHI (JP)
SAKAMOTO YUSUKE (JP)
FURUTANI SHINICHI (JP)
Application Number:
PCT/JP2022/027712
Publication Date:
January 18, 2024
Filing Date:
July 14, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/22
Foreign References:
| CN106712619A | 2017-05-24 | |||
| JP2016163495A | 2016-09-05 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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