The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2026
Filed:
Dec. 19, 2024
Alps Alpine Co., Ltd., Tokyo, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
Ripple detection device and seat device are provided that can optimally control variable filter passband in accordance with motor driving state by using linear relational expression for deriving ripple current frequency based on ripple current and motor terminal-to-terminal voltage, and can detect ripple pulses with high accuracy. Ripple detection device includes ripple current detector for detecting ripple current generated when motor is driven, motor voltage detector for detecting motor terminal-to-terminal voltage, variable filter for passing a component, of the ripple current detected by ripple current detector, that is in predetermined frequency band, and frequency adjuster for adjusting predetermined frequency band of variable filter to include ripple current frequency derived using linear relational expression for deriving ripple current frequency based on ripple current detected by ripple current detector and motor terminal-to-terminal voltage detected by motor voltage detector.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile