Method, apparatus and system for sensing balance coefficient of elevator and engineering machine

Abstract

The invention relates to the filed of control and discloses a method, apparatus and system for sensing a balance coefficient of an elevator and an engineering machine. The method comprises: determining a current value of a counter electromotive force of an elevator motor; judging whether the current value exceeds a first predetermined range; and under the circumstance that the current value exceeds the first predetermined range, calculating the balance coefficient of the elevator. By means of the technical solution, a relation of the current value of the counter electromotive force of the motor to the first predetermined range is taken as a condition for calculating the balance coefficient; as the calculation of the balance coefficient is triggered by means of a directly proportional relation of the current value of the counter electromotive force to the balance coefficient, a balance coefficient exception problem can be found out immediately, and therefore, a case that a passenger feels uncomfortable while taking the elevator due to a poor balance coefficient is avoided, the influence of damage of elevator accessories on the service life of the elevator is prevented, and people hurting events caused by uncontrollable running of the elevator due to running in a severe environment for a long time also are avoided. Meanwhile, a field operator can diagnose faults of elevator balance and the like conveniently.

Description

technical field [0001] The invention relates to the field of control, in particular to a method, equipment, system and engineering machinery for detecting an elevator balance coefficient. Background technique [0002] There are many ways to drive the elevator, such as traction drive, forced drive, hydraulic drive, etc. Among them, the traction drive is the most common drive mode used in modern elevators. The car and counterweight of the traction elevator are respectively suspended on both sides of the traction sheave through steel wire ropes. The gravity of the car and counterweight device makes the traction wire rope tightly pressed in the rope groove of the traction sheave. When the motor rotates, due to the friction between the rope groove of the traction wheel and the traction wire rope, the wire rope is driven to make the car and the counterweight move correspondingly, and the car moves up and down along the guide rail in the hoistway. The balance factor is an importan...

AI Technical Summary

Problems solved by technology

At the same time, it will also have an impact on the motor and affect the life of the elevator components.

If the car slides due to excessive balance coefficient deviation when passengers enter and exit the car, there will also be a high risk of shearing for passengers

[0004] For the above problems, there is no good solution in the prior art

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