Energy-saving control system for permanent magnet synchronous escalator

Abstract

The invention discloses an energy-saving control system for a permanent magnet synchronous escalator. The main loop is that: each phase of a three-phase power supply is connected with two groups of pulse width modulation controllers in star connection through an inductor and a resistor in sequence, wherein the central points of each group of pulse width modulation controllers are a positive electrode output end and a negative electrode output end respectively; and a capacitor is in bridge connection with the positive electrode output end and the negative electrode output end; the control circuit is that: a voltage signal and a current signal of each phase are sampled from each phase of the three-phase power supply and connected with a microprocessor through a shaping and isolating circuit; the voltage output from the positive electrode output end and the negative electrode output end is connected with the microprocessor through an isolating circuit; the three-phase pulse width modulation output of the microprocessor is connected with each pulse width modulation controller through a driver and an isolator respectively; and the microprocessor is connected with a failure protection circuit, a keyboard and a display and communication interface circuit. The energy-saving control system has the most important characteristic of energy conservation, so the average energy conservation of the escalator reaches over 40 percent, the average energy consumption is 50 percent of that during single-speed operation, the mechanical wearing is reduced, and the service life of the parts and the entire machine is prolonged.

Description

Technical field: [0001] The invention belongs to the field of elevator control and energy-saving control, and particularly relates to an energy-saving control system of a permanent magnet synchronous escalator. technical background: [0002] With the rapid economic development today, there are more and more large shopping malls, subway stations, and bus transfer stations. In these large commercial public places, escalators are an indispensable means of transportation. As a means of transporting passengers, they have not only successfully The distance between targets is reduced, and it is possible to transport large-volume personnel on ultra-short distances (such as floors, platforms, etc.). Therefore, economists said: "The emergence of escalators gives people the desire to visit large shopping malls." Traffic experts said: "It is the application of escalators and moving walks that allow us to build stations and airports as large as possible." The application of escalators has c...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a permanent magnet synchronous escalator energy-saving control system to effectively solve the

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