MOTOR-DRIVEN ACTUATOR

PROBLEM TO BE SOLVED: To provide a motor-driven actuator which permits holding of the operational end in any operating position without using any mechanical component to generate friction such as a clutch, brake, etc., can enhance the reliability, and is embodied in a small-sized, lightweight constr...

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Bibliographic Details
Main Authors TANAKA MITSURU, TAKANO TOMOHIRO
Format Patent
LanguageEnglish
Published 26.02.1999
Edition6
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a motor-driven actuator which permits holding of the operational end in any operating position without using any mechanical component to generate friction such as a clutch, brake, etc., can enhance the reliability, and is embodied in a small-sized, lightweight construction at a low cost. SOLUTION: In case the sensed angle is smaller than the target angle to a drive motor 3', a regular rotation command is sent to a pulse distributor circuit 7-2 so that the motor 3' is rotated in the regular direction, and a valve is turned in the direction of opening. In case the sensed angle is greater than the target angle, a reverse rotation command is sent to the pulse distributor circuit 7-2 so that the motor 3' is rotated in the reverse direction, and the drive shaft 1 is moved in the direction of closing. When the sensed angle is identical to the target angle, a brake command is sent to a brake circuit 7-3 so that a brake current is fed to the motor 3', and a torque balancing with the returning force of a return spring is generated, and the drive shaft is held in the present operating position.
Bibliography:Application Number: JP19970207742