Automatic escalator speed regulating method

Abstract

The invention relates to an automatic escalator speed regulating method. The automatic escalator speed regulating method includes the following steps that when an escalator operates without being loaded, the corresponding relation between an operation frequency and torque of a motor is learned on its own; the corresponding relation between the load rate of the escalator and the operation speed of the escalator is set; when the escalator goes upwards, the torque of the current motor of the escalator is detected and the current load rate is calculated; according to the current load rate, the corresponding operation speed is set; when the escalator goes downwards, the size of the voltage and a change trend of a bus of the escalator are detected; if the voltage of the bus is larger than G1 but smaller than G2 and upward going does not exist, the mode of the escalator is going to be switched to a working frequency mode; if the voltage of the bus is lager than G1 and upward going exists or if the voltage of the bus is larger than G2, the mode of the escalator is switched to the working frequency and operate; if the voltage of the bus is smaller than G3, the torque of the motor is detected and the current load rate is calculated; according to the current load rate, the corresponding operation speed is set. According to the method, no hardware is needed for controlling variation of the operation speed of the escalator and frequent switching of the working frequency will not happen. Thus, cost can be saved and damage to elements of the escalator is reduced.

Description

technical field

[0001] The invention relates to a frequency conversion escalator control method, in particular to a low-cost, energy-saving escalator automatic speed regulation method. Background technique

[0002] The photoelectric switch is generally an induction switch installed at the bottom or top of the escalator to judge whether someone has entered. It is an input judgment condition for the frequency conversion speed regulation of the escalator. When the escalator is going up, there is no power generation running state, only the electric state. When the escalator is going down, there will be a power generation operation state, which is equivalent to the passenger pulling the escalator by gravity. The four-quadrant inverter is an inverter with PWM rectification, that is, the generated energy can be fed back to the grid through its own PWM rectification.

[0003] With the country's requirements for energy saving and emission reduction, escalators also have frequency ...

Examples

Embodiment Construction

[0038] Such as figure 1 Shown is the flowchart of the automatic speed regulation method of the escalator.

[0039] A method for automatic speed regulation of an escalator, comprising the following steps:

[0040] Step S110, self-learning the corresponding relationship between the running frequency and the motor torque when the escalator is running without load.

[0041] The steps of step S110 self-learning the corresponding relationship between the running frequency and the motor torque when the escalator is running at no-load include:

[0042] ① After the escalator is powered on for the first time and runs stably at the low-speed energy-saving operating frequency f1 for the rated time, the B motor torque data of the escalator is sampled, and the B motor torque data are averaged and stored.

[0043] ② Increase the operating frequency by 0.5 Hz sequentially on the basis of the low-speed energy-saving operating frequency f1 until the escalator reaches the full-speed operating ...

technical field

[0001] The invention relates to a frequency conversion escalator control method, in particular to a low-cost, energy-saving escalator automatic speed regulation method. Background technique

[0002] The photoelectric switch is generally an induction switch installed at the bottom or top of the escalator to judge whether someone has entered. It is an input judgment condition for the frequency conversion speed regulation of the escalator. When the escalator is going up, there is no power generation running state, only the electric state. When the escalator is going down, there will be a power generation operation state, which is equivalent to the passenger pulling the escalator by gravity. The four-quadrant inverter is an inverter with PWM rectification, that is, the generated energy can be fed back to the grid through its own PWM rectification.

[0003] With the country's requirements for energy saving and emission reduction, escalators also have frequency ...

Examples

Embodiment Construction

[0038] Such as figure 1 Shown is the flowchart of the automatic speed regulation method of the escalator.

[0039] A method for automatic speed regulation of an escalator, comprising the following steps:

[0040] Step S110, self-learning the corresponding relationship between the running frequency and the motor torque when the escalator is running without load.

[0041] The steps of step S110 self-learning the corresponding relationship between the running frequency and the motor torque when the escalator is running at no-load include:

[0042] ① After the escalator is powered on for the first time and runs stably at the low-speed energy-saving operating frequency f1 for the rated time, the B motor torque data of the escalator is sampled, and the B motor torque data are averaged and stored.

[0043] ② Increase the operating frequency by 0.5 Hz sequentially on the basis of the low-speed energy-saving operating frequency f1 until the escalator reaches the full-speed operating ...

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