Title:
MOTOR-DRIVEN ACTUATOR
Document Type and Number:
Japanese Patent JP3398575
Kind Code:
B2
Abstract:
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.
Inventors:
Tomohiro Takano
Mitsuru Tanaka
Mitsuru Tanaka
Application Number:
JP20774297A
Publication Date:
April 21, 2003
Filing Date:
August 01, 1997
Export Citation:
Assignee:
YAMATAKE CORPORATION
International Classes:
F16K31/04; (IPC1-7): F16K31/04
Domestic Patent References:
| JP9137873A | ||||
| JP2188199A | ||||
| JP6265039A | ||||
| JP693888A | ||||
| JP2271175A | ||||
| JP112147A | ||||
| JP3247976A | ||||
| JP3247975A | ||||
| JP9196216A | ||||
| JP10164878A | ||||
| JP473670U | ||||
| JP1180198U |
Attorney, Agent or Firm:
Masaki Yamakawa