Torque adaptive method and device for door opening and closing in place of elevator door motor and elevator door motor control system

Abstract

The invention relates to a torque adaptive method for door opening and closing in place of an elevator door motor, which comprises the following steps of: B, judging whether an elevator door reaches a limitation position or not, if so, executing the step C; C, judging whether the current motor torque is larger than a switching torque or not, if so, setting the motor torque as an initial holding torque, and executing a torque adaptive control flow; D, judging whether a speed direction of the motor is consistent with a running instruction direction of the elevator door, if not, executing the step E, if so, executing the step F; E, increasing an absolute value of the current motor torque, and then jumping out of the flow; and F, judging whether the step E is executed or not, if not, reducing the absolute value of the current motor torque and jumping out of the flow, if so, adding or removing a predetermined torque into or from the current motor torque to be used as a final holding torque. According to the torque adaptive method, the output torque of the motor is automatically adjusted according to the size of a load, so that the output torque has the function equivalent to load moment, the motor current can be reduced, and the motor heating is effectively reduced.

Description

【Technical field】 [0001] The present invention relates to an elevator door machine, in particular to a door opening and closing torque adaptive method for an elevator door machine, a door opening and closing torque adaptive device for an elevator door machine, and an elevator door machine control system . 【Background technique】 [0002] In the field of elevator door machines, there are DC motors, AC asynchronous motors and permanent magnet synchronous motors. The current mainstream applications are AC asynchronous motors and permanent magnet synchronous motors. In door machine applications, the motor generally does not have a special cooling device. The effect is very poor, especially when the door operator is in the position of opening and closing the door and the motor is blocked, the heat dissipation effect is even worse. Motor heating is a very serious problem. In mild cases, it will affect the performance of the motor, and in severe cases, it may burn out the motor. ...

AI Technical Summary

Problems solved by technology

There are some inverters dedicated to vector control type door machines. Although they can control the current, they only limit the current to a certain range when the door is fully opened and closed. However, if the limit value is set too high, the motor current will be too large. Too small to overcome load torque

Images