Title:
RIPPLE-DETECTING DEVICE AND SEAT DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/004274
Kind Code:
A1
Abstract:
Provided are a ripple-detecting device and a seat device with which a linear relational formula for deriving, on the basis of ripple current and voltage across motor terminals, the frequency of the ripple current is utilized to enable optimal control of variable-filter passband in accordance with a drive state of the motor, and to enable detection of ripple pulses with high accuracy. A ripple-detecting device (100) is provided with: a ripple-current detecting unit (112, 24) that detects ripple current generated when a motor (23) is driven; a motor-voltage detecting unit (111) that detects voltage across the motor terminals; a variable filter (130) that passes components in a predetermined frequency band of the ripple current detected by the ripple-current detecting unit; and a frequency-adjusting unit (161) that, utilizing a linear relational formula for deriving a ripple current frequency on the basis of the ripple current detected by the ripple-current detecting unit and the voltage across the motor terminals detected by the motor-voltage detecting unit, adjusts the predetermined frequency band of the variable filter so as to include the derived ripple current frequency.
Inventors:
HAMAMATSU KAZUHIRO (JP)
SAWATAISHI TOMOYUKI (JP)
NAKAO KIMIHIRO (JP)
SAWATAISHI TOMOYUKI (JP)
NAKAO KIMIHIRO (JP)
Application Number:
PCT/JP2023/007311
Publication Date:
January 04, 2024
Filing Date:
February 28, 2023
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
H02P7/06
Foreign References:
| JP2003009585A | 2003-01-10 | |||
| JP2005020898A | 2005-01-20 | |||
| JP2009207236A | 2009-09-10 | |||
| US20200186062A1 | 2020-06-11 | |||
| JP2002059859A | 2002-02-26 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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