Title:
ELECTRIC MOTOR APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/038021
Kind Code:
A1
Abstract:
Provided is a highly redundant electric motor apparatus which, when a failure occurs in estimation of an angle, is able to identify a line where the failure has occurred, and which is able to continue operation even after occurrence of the failure. This electric motor apparatus has an electric motor (1) and a control device (2). The control device (2) has: at least three lines of angle estimation means (23, 24, 25) each of which estimates a relative angle between a stator (5) and a rotor (6) in the electric motor (1); and an angle estimation failure detection means (26) that detects a failure in at least one of detection lines in the respective angle estimation means (23, 24, 25) on the basis of comparison of estimated angles among the at least three lines. In the case when the angle estimation failure detection means (26) detects a failure in any of the detection lines, the angle estimated by the angle estimation means (23, 24, 25) in the detection line that is not experiencing the failure is outputted as a result of angle estimation, which in turn is used for controlling the electric motor (1).
Inventors:
MASUDA YUI (JP)
Application Number:
PCT/JP2017/029681
Publication Date:
March 01, 2018
Filing Date:
August 18, 2017
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H02P29/028; H02P25/022
Domestic Patent References:
| WO2015125235A1 | 2015-08-27 |
Foreign References:
| JP2011069815A | 2011-04-07 | |||
| JP2015173554A | 2015-10-01 | |||
| JP2006306166A | 2006-11-09 |
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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