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Patent Searching and Data


Title:
ELECTRIC MOTOR DEVICE AND ELECTRIC BRAKE DEVICE IN WHICH SAME IS USED
Document Type and Number:
WIPO Patent Application WO/2019/131659
Kind Code:
A1
Abstract:
Provided are an electric motor device and electric brake device with which it is possible to adequately restrict the motor maximum power consumption regardless of variations in motor properties, and to improve the output performance of an electric motor by maximizing the use of electric power within the allowable range. This electric motor device is provided with an electric motor (1) and a control device (2). The control device (2) is provided with: a power calculator (19) for estimating the voltage and current of an electric motor (1) and estimating the power consumption of the electric motor (1) from the estimated current and voltage; and a rotation motion estimator (15) for estimating the angular velocity of the electric motor (1). The control device (2) is provided with a motor output restrictor (8) for restricting, on the basis of the angular velocity, etc., the torque command value of the electric motor (1) so that the torque command value does not exceed a threshold value and outputting the result as a restricted value. The motor output restrictor (8) has a variable restrictor (20) which, if the power consumption estimated by the power calculator (19) is greater than a predetermined value, adjusts the restricted value so that the torque command value falls to a prescribed value.

Inventors:
MASUDA YUI (JP)
Application Number:
JP2018/047629
Publication Date:
July 04, 2019
Filing Date:
December 25, 2018
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H02P29/00; B60T8/17; B60T8/1761; B60T13/74
Foreign References:
JP2017039454A2017-02-23
JP2017052420A2017-03-16
JP2014051201A2014-03-20
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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