Title:
RIPPLE EXTRACTION DEVICE, MOTOR CONTROL APPARATUS, VEHICLE SEAT, AND RIPPLE EXTRACTION METHOD
Document Type and Number:
WIPO Patent Application WO/2012/124674
Kind Code:
A1
Abstract:
A ripple extraction device (3) extracts ripple components contained in a current signal of a motor (2). The ripple extraction device (3) is provided with: a current-voltage converter (10) that converts a current signal of the motor (2) into a voltage signal; a filter (40) that filters the voltage signal converted by the current-voltage converter (10), and attenuates the ripple components; and a differential amplifier (50) that obtains the difference between the voltage signal converted by the current-voltage converter (10) and an output signal of the filter (40).
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Inventors:
TANAKA SOICHIRO (JP)
KOWATA KOHEI (JP)
ITO TAKAYOSHI (JP)
SHIMAZAKI HAYATO (JP)
KOWATA KOHEI (JP)
ITO TAKAYOSHI (JP)
SHIMAZAKI HAYATO (JP)
Application Number:
PCT/JP2012/056362
Publication Date:
September 20, 2012
Filing Date:
March 13, 2012
Export Citation:
Assignee:
TS TECH CO LTD (JP)
TANAKA SOICHIRO (JP)
KOWATA KOHEI (JP)
ITO TAKAYOSHI (JP)
SHIMAZAKI HAYATO (JP)
TANAKA SOICHIRO (JP)
KOWATA KOHEI (JP)
ITO TAKAYOSHI (JP)
SHIMAZAKI HAYATO (JP)
International Classes:
H02P7/06
Foreign References:
JP2009247080A | 2009-10-22 | |||
JP2005271730A | 2005-10-06 | |||
JP2009022116A | 2009-01-29 | |||
JP2008086104A | 2008-04-10 | |||
JP2008283762A | 2008-11-20 | |||
JP2003009585A | 2003-01-10 | |||
JP2008283762A | 2008-11-20 | |||
JP2000250629A | 2000-09-14 | |||
JP2010033513A | 2010-02-12 | |||
JP2003536355A | 2003-12-02 | |||
JP2003009585A | 2003-01-10 |
Other References:
See also references of EP 2688197A4
Attorney, Agent or Firm:
ARAFUNE, Hiroshi et al. (JP)
Hiroshi Arafune (JP)
Hiroshi Arafune (JP)
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Claims:
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