Design And Implementation Of High-speed Elevator Energy-saving Drive Integrated System

With the accelerating process of urbanization and the continuous breakthrough of building height,the elevator which is the essential means of transport is also accelerating.The demand of high-speed elevator is increasing constantly.At the same time,the problem of energy consumption caused by elevator speed-up is emphasized.The research of how to reduce the energy consumption of high-speed elevator system,and the development of energy-saving high-speed elevator system has gradually become a research focus.In this paper,a high-speed elevator energy-saving and driving integrated system is designed and implemented from the practical application point of view.The details are as follows:Firstly,the working principle of elevator system is analyzed,and the overall design scheme of high-speed elevator energy-saving and driving integrated system is proposed based on the system performance index.A driving system based on traditional AC-DC-AC variable frequency driving technology was designed to drive the elevator traction machine.Aiming at the energy-saving requirement of the high-speed elevator system,the energy-saving system which can accomplish the recovery and re-use of the feedback energy from elevator driving system by using a bidirectional DC-DC converter(the Buck-Boost converter)is designed based on the super capacitor as its energy storage component.The main control system is designed to control the drive system and energy-saving with double DSP and FPGA as the control core.Secondly,the hardware circuit of the main control system,the drive system and the energy-saving system are designed by using the modularization idea based on the selection of the core devices of each module.The hardware circuit includes the main control system which consists of core circuit including double DSP+FPGA circuits and peripheral circuits,such as data acquisition and processing circuits,signal output circuits and data interactive communication circuits,the drive system which consists of over-current protection and is based on rectifier device and intelligent inverter,voltage and current acquisition circuit,and the energy-saving system with Buck-Boost converter as its core.The design and manufacture of circuit PCB are finished after completing the design of circuit schematic.Then,the algorithm and software design of high-speed elevator energy-saving and driving integrated system are accomplished.The algorithm design mainly includes introducing the vector control algorithm used in traction machine driving,and designing the traction machine initial angle detection algorithm and energy saving control algorithm.The main part of the software includes DSP and FPGA software design.The main DSP and FPGA complete the elevator system floor decision control,gate signal control and fault signal processing,and the auxiliary DSP completes the traction machine drive control and energy saving control.Finally,the system debugging is conducted on the high-speed elevator test tower in Jiangsu General Elevator Company,including the sub-module debugging of each module of the system,and the overall debugging of the high-speed elevator energy-saving and driving integrated system.The reliability of the drive system and energy efficiency of the energy-saving system are finally verified in the high-speed elevator system.