Special no-weighing starting torque compensation algorithm for elevator and debugging method

Abstract

The invention discloses a special no-weighing starting torque compensation algorithm for an elevator and a debugging method. The algorithm comprises the following steps that 1) a first set of PI parameters is used for performing the speed ring control with a given speed as 0 on a system before switching off; 2) an elevator moving threshold is set; when the movement of the elevator does not exceed the elevator moving threshold, the first set of PI parameters is always kept until the torque compensation is finished; when the movement of the elevator exceeds the elevator moving threshold, P in the first set of PI parameters of a PI controller is increased, and I is decreased to obtain a second set of PI parameters; the speed ring control with the given speed as 0 is continued until the condition of opposite speed direction and displacement beginning direction is generated; and the second set of PI parameters is adjusted back to the original first set of PI parameters; and 3) a maximum displacement and a maximum speed in the starting torque compensation process are recorded and displayed in a control system menu.

Description

technical field [0001] The invention relates to the field of elevator drive control, in particular to an elevator-specific unscaled restart torque compensation algorithm and a debugging method. Background technique [0002] In the vertical elevator system, the elevator car and the counterweight are twisted on both sides of the traction sheave through the wire rope. Generally, the weights of the elevator car and the counterweight are different, resulting in the moment when the elevator releases the brake, it is originally provided by the brake. The braking torque disappears quickly, and the elevator control system cannot respond quickly at this time, causing the elevator to slip or protrude. There are two traditional methods, one: add an analog weighing system to the elevator, so that the control system can detect the load of the elevator before the elevator releases the brakes, so that the compensation torque can be given before the brakes are released. However, this method...

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Problems solved by technology

However, this method has several disadvantages: 1. Generally, the analog weighing system is expensive; 2. It is difficult to debug the analog weighing system, and generally requires workers to adjust the weighing under multiple load conditions such as full load, half load, and no load. The output of the system; 3. The compensation effect is unstable. Due to the influence of AD sampling accuracy, temperature, aging and other factors, the output accuracy of analog weighing changes greatly, and it needs to be re-adjusted regularly

Second: Use the displacement proportional algorithm, that is, the torque is given in proportion to the displacement of the elevator when it starts to slide backwards. This algorithm has the following disadvantages: 1. It is difficult to debug. In the actual debugging process, the human body does not feel the displacement Obviously, you can only feel the frustration when the elevator starts, and you can't clearly distinguish the compensation direction of the elevator; 2. The uncertainty of the opening time of the brake, because the actual process cannot predict the opening time and The time when the brake is fully opened, so the compensation time is difficult to determine

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