Title:
MOTORIZED VALVE CONTROL DEVICE AND MOTORIZED VALVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/248885
Kind Code:
A1
Abstract:
[Problem] To provide a motorized valve control device and a motorized valve device that can more accurately detect a malfunction of a stepping motor of a motorized valve. [Solution] A motorized valve device (1) comprises a motorized valve (5) and a motorized valve control device (100). The motorized valve (5) has a stepping motor (66), and the stepping motor (66) has a magnet rotor (31), an A-phase stator (61), and a B-phase stator (62). The motorized valve control device (100) controls an A-phase current (Ia) which is supplied to an A-phase coil (61c) of the A-phase stator (61), and a B-phase current (Ib) which is supplied to a B-phase coil (62c) of the B-phase stator (62), by a PWM method. The motorized valve control device (100) detects occurrence of an abnormality in the A-phase coil (61c) or the B-phase coil (62c), on the basis of a comparison between an A-phase duty ratio (Da) related to the A-phase current (Ia) and a B-phase duty ratio (Db) related to the B-phase current (Ib).
Inventors:
HAGIMOTO HIROSHI (JP)
NARUKAWA BUNTA (JP)
NARUKAWA BUNTA (JP)
Application Number:
PCT/JP2023/022038
Publication Date:
December 28, 2023
Filing Date:
June 14, 2023
Export Citation:
Assignee:
FUJIKOKI CORP (JP)
International Classes:
F16K31/04; H02P8/36; F16K37/00; F16K51/00
Foreign References:
| JP2021197760A | 2021-12-27 | |||
| JP2023084894A | 2023-06-20 |
Attorney, Agent or Firm:
OPUS IP LAW FIRM (JP)
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