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Title:
ACTUATOR, BAND BRAKE DEVICE, AND MOTOR CONTROL METHOD
Document Type and Number:
Japanese Patent JP2013019518
Kind Code:
A
Abstract:

To provide an actuator, a band brake device, and a motor control method, that can easily know the timing when braking force is generated.

The actuator calculates the displacement amount of a driven mechanism based on an electric current ripple component Ir in at least one of the time periods that are: a free-running time period S being a time period from a time point at which the driven mechanism starts displacing and an elastic deforming member starts braking of a rotator, to a time point at which the driven mechanism stops displacing and the braking force generation is completed; and a releasing time period W being a time period from a time point at which the driven mechanism starts displacing so that the braking of the elastic deforming member is released from a state that the rotation of the rotator is stopped by the braking by the elastic deforming member and the rotator starts rotation, to a time point at which the driven mechanism stops displacing.


Inventors:
ASADA TOSHIAKI
SHIMIZU YASUHIRO
SUZUKI KAZUYA
HASHIMOTO KOJI
Application Number:
JP2011000155172
Publication Date:
January 31, 2013
Filing Date:
July 13, 2011
Export Citation:
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Assignee:
NSK LTD
International Classes:
F16D66/00; F16D49/02; F16D65/14; F16H61/28; F16H63/30; H02P3/06; H02P3/08
Attorney, Agent or Firm:
酒井 宏明



 
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