Anti-slip control method and system for construction hoist

Abstract

The invention relates to the field of hoisting equipment, and provides an anti-slip control method for a construction hoist, which comprises the following steps of receiving a braking instruction or a starting instruction, and acquiring a rotating speed signal of a motor; when the braking instruction is received, controlling the motor to output braking torque matched with the current car load of the construction hoist; and when the starting instruction is received, on the basis that the car load of the construction hoist and the braking torque output by the motor reach dynamic balance, controlling the motor to output the starting compensation torque, and controlling the car displacement generated in the starting stage to be within an error range, and driving the motor to execute an action corresponding to the starting instruction. According to the scheme, the motor is used for outputting the braking torque and the driving torque, so that the motor has the braking and driving functions at the same time, seamless butt joint of the braking process and the driving process is guaranteed, the starting and stopping process of the hoist is stable, and sliding is prevented.

Description

technical field [0001] The invention relates to the field of lifting equipment, in particular to an anti-rolling control method and system for a construction elevator. Background technique [0002] The sliding phenomenon of the elevator means that after the motor lifts the car to the designated point, the motor power is cut off and the brake brakes, the car will first descend a certain distance and then hover; when the car hovering in mid-air needs to continue to start When lifting, the brake is usually released, and then the motor is energized to start. If the brake has been released and the torque of the motor has not risen to a certain value, the car will move down first, and then go down as the torque of the motor gradually builds up. move up. [0003] At the present stage, the lifting and lowering of the car of the construction elevator is controlled through the timing cooperation of the braking torque of the brake and the driving torque of the motor. The driving torqu...

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Problems solved by technology

[0003] At the present stage, the lifting and lowering of the car of the construction elevator is controlled through the timing cooperation of the braking torque of the brake and the driving torque of the motor. The driving torque of the motor is determined by the output frequency of the frequency converter and Current is controlled, which belongs to electrical control, and its response is fast, accurate and controllable, while the braking torque of the brake is controlled by the power-on and power-off of the brake, which belongs to mechanical brake, and there must be a mechanical delay during the braking and releasing of the brake. , the corresponding output braking torque will also have a delay, and during the period from the beginning of the braking torque output to the holding period of the braking torque output, the braking torque is uncontrollable and cannot be matched with the driving torque output by the motor, so that Under different load conditions of the construction elevator, the car will slide to different degrees at the moment of starting

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