Title:
ELECTRIC MOTOR DEVICE AND ELECTRIC LINEAR MOTION ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2016/181898
Kind Code:
A1
Abstract:
Provided are an electric motor device and electric linear motion actuator that make it possible to reduce costs and reduce workload, and to precisely find all motor coil temperatures from some motor coil temperatures or the like. A temperature sensor (26) is provided to at least one of a plurality of excitation coils (4a). A control device (2) has a current sensor (22), a coil temperature estimating means (19), and an estimation error correcting means (20). The coil temperature estimating means (19) calculates an estimated temperature of a plurality of excitation coils (4a) from a coil current found by the current sensor (22) and from information including the heat generation and heat dissipation characteristics of the excitation coils (4a). The estimation error correcting means (20) corrects the estimated temperature of all of the excitation coils (4a) estimated by the coil temperature estimating means (19) on the basis of a result of comparison between the coil temperature detected by the temperature sensor (26) for the excitation coil(s) (4a) to which the temperature sensor (26) is provided and the estimated temperature.
Inventors:
MASUDA YUI (JP)
Application Number:
PCT/JP2016/063649
Publication Date:
November 17, 2016
Filing Date:
May 06, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H02P29/64; G01K7/00; H02K7/102; H02K11/25
Foreign References:
| JP2001268989A | 2001-09-28 | |||
| JP2009089531A | 2009-04-23 | |||
| JP2015033995A | 2015-02-19 | |||
| JP2006050746A | 2006-02-16 |
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)
Shuji Sugimoto (JP)
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