Elevator energy saving system and its control experience

The elevator has high operating frequency and long running time, which belongs to the mechanical and electrical equipment with high energy consumption in the construction project. At present, the problems of energy and environment are becoming more and more prominent, and the problem of energy saving and reducing consumption has been paid much attention by the society.
The elevator has high operating frequency and long running time, which belongs to the mechanical and electrical equipment with high energy consumption in the construction project. At present, the problems of energy and environment are becoming more and more prominent, and the problem of energy saving and reducing consumption has been paid much attention by the society. In order to improve the efficiency of elevator energy saving, the elevator energy saving system is applied in the elevator system. Based on the analysis of the importance of elevator energy saving control system, elevator energy saving and its control are studied from aspects of elevator driving part, operation control mode and energy feedback.
Research on the importance of elevator energy saving control system
Social and economic development has accelerated the process of urbanization, and the scale of the city has been expanding. The application of high-rise buildings and super high-rise buildings has provided huge market space for the development of elevator enterprises. The elevator is an indispensable vehicle for high rise and super high rise buildings. It has high operating frequency, long running time and high energy consumption. At present, the problem of energy shortage is becoming more and more serious. In order to achieve the sustainable development of social economy, the government proposes measures for energy conservation and emission reduction, requiring all sectors to take measures to reduce energy consumption. The elevator is an important energy consumption facility in the building, and it is an important object of energy saving and consumption reduction. Relatively developed countries, China has large energy consumption and low energy utilization. The application of elevator energy saving control system can improve energy utilization, reduce energy consumption of elevators and achieve energy saving targets. Its economic significance and social significance are great.
Application of energy saving technology in elevator energy saving system
Energy saving technology of 2.1. elevator transmission part
Improving the efficiency of the elevator mechanical transmission is the key to realize the energy saving of the elevator. At present, during the operation of the elevator motor, its rated speed is relatively high, and the output torque is relatively small. It is necessary for the reducer to drive the tractive wheel through the deceleration mechanism with low speed and increasing torque, and it does not directly drive and control the traction wheel. At present, the high-rise building elevator adopts worm gear worm drive mode. Its transmission mode is inefficient in application. In order to achieve elevator energy saving, elevator driving efficiency needs to be improved.
2.1.1. permanent magnet synchronous gear free drive technology
The application of synchronous gearless technology has realized the transformation of elevator driving technology. The comprehensive application of motor shaft and traction wheel will increase the efficiency of elevator transmission from the original 60% to more than 85%, and its transmission efficiency is relatively high. The application of the permanent magnet synchronous gear free drive technology in the elevator drive shows the advantages of light weight, light vibration and small volume.
2.1.2. planetary gear drive technology
The driving efficiency of the planetary gear driving technology is very prominent, and the maximum transmission efficiency can reach 90%. The application of planetary gear drive technology to replace worm and worm transmission is complex and costly, which limits the application and popularization of the technology.
2.1.3. synchronous planetary gear driving technology
Planetary gear drive synchronization technology integrated gearless permanent magnet synchronous drive technology and planetary gear drive technology, the application of synchronous planetary gear drive technology in ordinary low-speed lift, can achieve 1:1 traction ratio, thereby reducing the traction steel wire rope tile bending, extend the application life of steel wire rope. However, in the application of synchronous planetary gear drive, the elevator operation performance is not improved, and the cost is high, which affects its application and promotion.
Energy saving technology of 2.2. in the control mode of elevator
In the control of elevator energy saving system, it is necessary to adjust the operation mode of the elevator reasonably in order to reduce the unnecessary energy consumption. In the way of elevator control, it mainly includes three ways of parallel control, ladder group control and ladder group intelligent control.
2.2.1. parallel control mode
In the elevator operation, the parallel control mode is more suitable for the number of two or three elevators. The calling button is set outside some parts of the shared layer. The elevator itself has the set selection function. Selection and application of parallel control method, its advantage is shown in the following aspects: in the absence of elevator running tasks, lift its control, including a stop at the station, a call to the preset floor for free in the elevator ladder; when running a task, the elevator at the base station to run on another the elevator is automatically dropped to the base station; the base station sends instructions to the outside floor elevator, staircase to make free floors, such as floor signal and free ladder run in the opposite direction, from the elevator to the base station. Through this control method, the elevator operation efficiency is improved.
2.2.2. ladder group program control elevator mode
The way of elevator control by ladder group is to control and dispatch multiple parallel elevators based on microcomputer, and arrange multiple elevators in a centralized way, sharing call buttons, and carrying out elevator control and scheduling according to the established procedures.
Intelligent control mode of 2.2.3. ladder group
The intelligent control of ladder group has high intelligence level, which can carry on data acquisition, exchange and storage, and analyze data on the basis of data acquisition. Under the control mode, the operation state of the elevator can be displayed, and the problems in the operation of the elevator can be found and solved in time. With the application of computer technology, the intelligent control mode has worked out the best operation mode, which can effectively save the elevator running time and reduce the energy consumption of the elevator.
Analysis of energy saving technology in 2.3. energy feedback
Energy feedback is an important way of elevator energy saving, and the energy feedback device is installed in the elevator operation to achieve the energy saving goal. In the elevator operation, the energy feedback technology is adopted, and its dominant power is dominant.