Elektrische Ventilsteuerungsvorrichtung, Elektrische Ventilvorrichtung und Verfahren zur Bestimmung des Zustandes eines Elektrischen Ventils

Details

Veröffentlichungs-Nr.

EP4753140

Anmeldetag

13. Mai 2024

Veröffentlichung

30. Januar 2025

Rechtsraum

EP

IPC

H02P8/34, F16K31/04

Abstract

[Problem] To provide a motor-operated valve control device, a motor-operated valve device including a motor-operated valve control device, and a method for determining a state of a motor-operated valve, each of which is capable of determining at an appropriate timing whether the rotation of a rotor of a stepping motor is restricted.[Solution] A driving current for rotating a rotor 41 is controlled by a pulse-width modulation method and is supplied to a coil of a stator 60 of a stepping motor 66. A motor-operated valve control device 70 includes a low-pass filter having a cutoff frequency lower than a pulse-width modulation frequency used in the pulse-width modulation method, and allows a voltage component in a voltage generated in the coil to pass, the voltage component having a frequency lower than the cutoff frequency. The motor-operated valve control device 70 includes a computer configured to determine, using the voltage component passing through the low-pass filter, whether a motor-operated valve 5 is in a rotation restricted state in which the rotation of the rotor 41 is restricted.

Anmelder

Firma

Fujikoki Corporation

Land

🇯🇵 Japan

Fachgebiete