Title:
ELECTRIC BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/090095
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an electric brake device which, without depending on a mechanical structure and requiring a measurement in advance, can calculate a conversion ratio of a thrust force with respect to a current in response to even a temporal change. The present invention is provided with: an electric motor 8; a piston 6 which moves due to the rotation of the electric motor 8; brake pads 5a, 5b which press a disk rotor 2 with a thrust force generated by the movement of the piston 6; and a motor control device 11 which controls the rotation of the electric motor 8. The motor control device 11 comprises an efficiency estimation unit 35 which, on the basis of a relationship between an increase in the current value of the electric motor 8 with respect to an increase in the position of the piston 6 and the current value of the electric motor 8, estimates the relationship between the current supplied to the electric motor 8 and the thrust force.
Inventors:
SETO SHINJI (JP)
GOTO DAISUKE (JP)
GOTO DAISUKE (JP)
Application Number:
PCT/JP2022/039887
Publication Date:
May 25, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
B60T13/74; B60T17/22; F16D65/18; F16D66/02; F16D121/24
Foreign References:
| JP2012159134A | 2012-08-23 | |||
| JP2008049800A | 2008-03-06 | |||
| JP2018095072A | 2018-06-21 | |||
| JP2003106355A | 2003-04-09 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
Download PDF: