| 摘要 |
PROBLEM TO BE SOLVED: To control stably and rapidly a door to get an objective transfer speed. SOLUTION: A driving motor 20 speed is reduced by a reduction gear 5 to drive a driving pulley 16. An encorder circuit 19 provided in the driving pulley 16 outputs pulses in accordance with the driving direction of the driving pulley 16 to a controller 500. A pulse tachometer 25 connected to the motor 20 genetares voltage in accordance with the revolution of the motor 20 to give the voltage to the controller 500. The controller detects the transfer speed of the door from the input voltage and detects the transfer direction and present position of the door 10 from the input pulse. The controller 500 controls the continuity period of the motor 20 by use of an accelerating continuity angle when it needs acceleration and by use of an decelerating continuity angle when it needs deceleration, on the basis of the detected result of the transfer speed so as to get a preset transfer speed. |
