MOTOR OPERATED VALVE APPARATUS AND MOTOR OPERATED VALVE CONTROLLER

摘要

A motor operated valve apparatus includes: a motor driven valve; a drive unit configured to drive the motor; a control unit configured to control the drive unit; and a communication unit configured to communicate with an external controller. The control unit starts control of the motor operated valve according to a command from the external controller; drives the motor in a valve closing direction at start of the control, detects a load on the motor based on a drive pulse output by the drive unit for driving the motor, and sets a driven state when the detected load reaches a predetermined reference value to be a valve switching point of a valve section; and drives the motor relative to the valve switching point of the valve section to perform control so that an opening degree of the valve section becomes a value corresponding to a control command value.

主权项

1. A motor operated valve apparatus comprising:
a motor operated valve driven by a motor; a drive unit configured to drive the motor; a control unit configured to control the drive unit; and a communication unit configured to communicate with an external controller, wherein the control unit is configured to:
start control of the motor operated valve according to a command from the external controller;drive the motor in a valve closing direction at start of control of the motor operated valve, detect a load on the motor based on a drive pulse output by the drive unit for driving the motor, and set a driven state when the detected load reaches a predetermined reference value to be a valve switching point of a valve section; anddrive the motor relative to the valve switching point of the valve section to perform control so that an opening degree of the valve section becomes a value corresponding to a control command value.