Full-digital portal crane control system and control method

Abstract

The invention relates to a system and a method for controlling a full digital door machine. A control device is connected with a power supply and a motor; a speed reduction mechanism is fixed with the motor, a gear and a rotating shaft; a belt is connected with the gear; a door body is connected with a connecting piece and a sliding rail; and the connecting piece is connected with the belt. The method comprises: the low speed and acceleration of the door body and the total running distance of the door body are used to calculate a second speed reduction point; the high speed, low speed and acceleration of the door body, the running distance of the low-speed motion stage and the total running distance of the door body are used to calculate a first speed reduction point; the position of closing the door is reset to zero; a photoelectric encoder determines the running position of the door body; the door body actually runs to the speed instruction value of the speed reduction point and begins to decelerate; and distance deviation between the instruction value and the actual speed value in the acceleration process is obtained. The system and the method solve the problem of overlarge deviation between the expected speed and the actual speed in the acceleration process of the running of the door body and reduce hardware cost. Current and speed double closed loop control ensures control precision and response precision. A double-redundancy mode of the current detection of an obstacle and the position current of the obstacle ensures the running safety of the door body.

Description

technical field

[0001] The invention relates to a control device and a control method for driving a door machine to open and close a door body. Background technique

[0002] The door machine system is generally installed above the door frame of the elevator door and automatic door, and is used to control the opening and closing of the door body. At present, traditional motors such as DC motors, single-phase asynchronous motors, and three-phase asynchronous motors are used as actuators in common door machine controllers. This type of device has the problems of frequent maintenance, large volume, low efficiency, and high cost. In addition, some controllers use speed open-loop control in terms of control methods, which have poor control accuracy and poor adaptability to door machine load changes, which cannot meet the requirements of high-end elevators and automatic door-to-door machines.

[0003] As a door machine system driving elevator doors and automatic doors, it is nece...

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