Title:
ACTUATOR AND MAGNETIC POLE POSITION ESTIMATION METHOD
Document Type and Number:
Japanese Patent JP2023118600
Kind Code:
A
Abstract:
To provide a technique capable of grasping a position of a magnetic pole of a rotor in a direct-acting motor without moving a shaft in an actuator.SOLUTION: An actuator comprises: a direct-acting motor which moves a shaft in an axial direction by moving a rotor relatively to a stator; a brake device which brakes the movement of the shaft in the axial direction; and a force sensor which detects a direction of a force acting on the rotor in the axial direction of the shaft. In the actuator, estimation means estimates a position of a magnetic pole of the rotor based on the direction of the force detected by the force sensor when the direct-acting motor is electrified in a state where the movement of the shaft in the axial direction is stopped by the brake device.SELECTED DRAWING: Figure 5
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Inventors:
FUKUSHIMA KATSUYA
WAKUTA SHOGO
HARA SATOSHI
ISHII MASASHI
MAEDA YASUTOMO
WAKUTA SHOGO
HARA SATOSHI
ISHII MASASHI
MAEDA YASUTOMO
Application Number:
JP2022021622A
Publication Date:
August 25, 2023
Filing Date:
February 15, 2022
Export Citation:
Assignee:
THK CO LTD
International Classes:
H02P25/064; H02K41/03
Attorney, Agent or Firm:
Patent Attorney Corporation Shuwa Patent Office