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Patent Searching and Data


Title:
SIGNAL PROCESSOR, ENCODER, AND MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/125360
Kind Code:
A1
Abstract:
Disclosed are a signal processor, encoder and motor system with which it is possible to reduce the misalignment that occurs between the detected position calculated by an encoder and the actual position. The signal processor comprises: an AD converter that converts a periodic analog signal outputted from a detection unit according to the position (Q) of the motor into a digital signal in a predetermined conversion cycle (Tad); a tracking unit that calculates the position (P) of the motor in the calculation cycle (Tc) on the basis of the digital signal outputted at the conversion cycle (Tad) converted by the AD converter; an operating status specifying unit that specifies the operating status of a motor on the basis of the position (P) of the motor calculated by the tracking unit; and calculation cycle determining units (213), (216) that change the calculation cycle (Tc) of the tracking unit in such a manner that the position (P) of the motor, as calculated by the tracking unit according to the operating status of the motor specified by the operating status specifying unit, tracks the actual position (Q) of the motor.

Inventors:
YOSHITAKE HIRONOBU (JP)
SAKATA TOSHIKAZU (JP)
Application Number:
PCT/JP2011/051215
Publication Date:
October 13, 2011
Filing Date:
January 24, 2011
Export Citation:
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Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
YOSHITAKE HIRONOBU (JP)
SAKATA TOSHIKAZU (JP)
International Classes:
G01D5/244
Foreign References:
JPH04328410A1992-11-17
JP2008299426A2008-12-11
JP2009148055A2009-07-02
JPH08272420A1996-10-18
JPH1019598A1998-01-23
JPH04328410A1992-11-17
Other References:
See also references of EP 2554951A4
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Download PDF:
Claims: