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Patent Searching and Data


Title:
ELECTRIC LINEAR MOTION ACTUATOR AND ELECTRIC BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/039400
Kind Code:
A1
Abstract:
Provided are an electric linear motion actuator and an electric brake device with which a reduction in the size of an electric motor can be achieved, and with which it is possible to perform high-output motor control in a space saving manner. An electric linear motion actuator (DA) according to the present invention is provided with an electric motor (4), a linear motion mechanism (6) which converts rotating movement of the electric motor (4) into linear movement of a linear motion unit, and a control device (2) for controlling the electric motor (4). The control device (2) includes: an angular velocity estimating functional unit (20b) which estimates the angular velocity of the electric motor (4); a current limiting functional unit (23a) which limits a current energizing the electric motor (4) to a prescribed maximum value; and a maximum current adjusting functional unit (24) which, when the angular velocity estimated by the angular velocity estimating functional unit (20b) exceeds a prescribed angular velocity, increases the maximum value of the current limited by the current limiting functional unit (23a).

Inventors:
MASUDA, Yui (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
Application Number:
JP2018/030518
Publication Date:
February 28, 2019
Filing Date:
August 17, 2018
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
H02P21/00; B60T13/74; F16D65/18; H02K7/102; F16D121/24
Foreign References:
JP2011230604A2011-11-17
JP2017039454A2017-02-23
JP2010064544A2010-03-25
JP2017017909A2017-01-19
JP2014113050A2014-06-19
JP2003135883A2003-05-13
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (Higobashi Nittai Bldg, 10-2 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, 〒5500002, JP)
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