Patent ID: 6935611
Filing Date: 2005-08-30
Classification: F16K

Abstract:
1. A motor control device for a flow control device comprising: an opening part through which an upstream side of a fluid flow passage is in communication with a downstream side of the fluid flow passage; a valve element that controls a flow of a fluid which passes through the opening part; a motor which includes a rotor and a stator that relatively moves the valve element with respect to the opening part; a drive control section by which the motor is rotationally driven and controlled; drive pulses which are outputted from the drive control section for rotationally driving the rotor of the motor; and a stop pulse which is outputted from the drive control section and set to be a period width longer than that of the drive pulse for stopping the rotor of the motor at a prescribed position, wherein the stop pulse is applied to the motor and the rotor stops at the prescribed position by a magnetic detent torque between the rotor and the stator.