Title:
ELECTROMAGNETIC BRAKE CONDITION DIAGNOSIS DEVICE AND METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2013/088823
Kind Code:
A1
Abstract:
In an electromagnetic brake wherein braking force is generated by pressing a brake shoe against a brake drum by means of a spring, and a control voltage that is supplied to a brake coil of an electromagnet that attracts the brake shoe in resistance to the pressing force of the spring is controlled with a control unit, an electromagnetic brake condition diagnosis device that detects the drop-away starting current when the brake drops, and the attraction starting current when the brake is attracted, estimates the relationship between the pressing force and the brake stroke from the detected drop-away starting current, estimates the relationship between the attraction force of the electromagnet and the brake stroke from the detected attraction starting current, and uses the estimated relationship between the pressing force and the brake stroke and the estimated relationship between the attraction force and the brake stroke to detect the brake stroke and the pressing force.
Inventors:
ITOU NORIKAZU (JP)
SAKAI MASAYA (JP)
SAKAI MASAYA (JP)
Application Number:
PCT/JP2012/076122
Publication Date:
June 20, 2013
Filing Date:
October 09, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ITOU NORIKAZU (JP)
SAKAI MASAYA (JP)
ITOU NORIKAZU (JP)
SAKAI MASAYA (JP)
International Classes:
F16D66/00; B66B5/00; B66B5/02; F16D55/00; F16D65/14; F16D65/22
Foreign References:
| JPS616437A | 1986-01-13 | |||
| JPS61287684A | 1986-12-18 | |||
| JPH0236518B2 | 1990-08-17 | |||
| JPH07285750A | 1995-10-31 | |||
| JPH07144889A | 1995-06-06 | |||
| JPH0842613A | 1996-02-16 | |||
| JP2008115993A | 2008-05-22 | |||
| JP2008168981A | 2008-07-24 | |||
| JPS57139745U | 1982-09-01 |
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
Michiharu Soga (JP)
Michiharu Soga (JP)
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Claims: