Title:
DIAGNOSIS SYSTEM FOR BALL SCREW UNIT, AND MOTOR CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/117152
Kind Code:
A1
Abstract:
The purpose of the present invention is to more suitably detect a fault accompanying a reduction in pre-load of a ball screw unit. Fault diagnosis of the ball screw unit is performed on the basis of the combination of: a resonance frequency in the axial direction of a prescribed machine structure that includes the ball screw unit and the motor, when a screw shaft is rotationally driven by the motor; and the position of a nut member of the screw shaft corresponding to said resonance frequency.
Inventors:
HONJO YOSHIYUKI (JP)
YAMANAKA SHUHEI (JP)
IIDA KATSUYA (JP)
TAKAHASHI SATOSHI (JP)
YAMANAKA SHUHEI (JP)
IIDA KATSUYA (JP)
TAKAHASHI SATOSHI (JP)
Application Number:
PCT/JP2018/045529
Publication Date:
June 20, 2019
Filing Date:
December 11, 2018
Export Citation:
Assignee:
THK CO LTD (JP)
DISCO CORP (JP)
DISCO CORP (JP)
International Classes:
F16H25/22; H02P29/024
Foreign References:
| JP2013164386A | 2013-08-22 | |||
| JP2013257014A | 2013-12-26 | |||
| JP2010038567A | 2010-02-18 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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