Control system of lift door motor and control method thereof

Abstract

The invention provides a control system of a lift door motor and a control method thereof. The control system comprises a microcontroller and an electromagnetic encoder, wherein the microcontroller is provided with a door width detection module, a door-opening control module and a door-closing control module; the door width detection module reads an initial signal of the electromagnetic encoder and calculates the number of rotation turns of a rotor shaft after receiving a door width detection signal, and reads a real-time signal of the electromagnetic encoder, calculates the width of a lift door and saves the width in a memory after receiving a door opening limit signal; the door-opening control module controls the opening of the lift door, calculates first real-time door width data of the lift door and draws a door opening speed curve; and the door-closing control module controls the lift door to be closed, calculates second real-time door width data of the lift door and draws a door closing speed curve under the condition of meeting door closing requirements. The control method is used for controlling the lift door motor by utilizing the control system. The invention can carry out door width detection on the lift door, draws the speed curve in real time and more exactly controls the lift door motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a motor control system applied to elevator doors and a control method for elevator door motors. Background technique [0002] The elevator car door is usually driven by a servo motor to open and close, so it is necessary to precisely control the elevator door motor to realize the fast and accurate opening and closing of the elevator door. In the past, the control of the elevator door was realized by travel switches or speed measuring machines, but due to its single operating parameters, many mechanical actions, and low operating reliability, it has been unable to meet the control requirements of modern motors. Therefore, the current elevator door motor control usually uses power electronics technology to control the operation of the motor by using a microcontroller such as a single-chip microcomputer. [0003] The control of the elevator door motor is mainly to control the rotation ...

AI Technical Summary

Problems solved by technology

However, the existing elevator door control technology often calculates the door opening speed curve or door closing speed curve by drawing the torque curve of the rotor shaft or dividing the time period. The speed curve drawn in this way is not accurate, resulting in inaccurate control.

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