Experimental prototype of an electric elevator

4th ModTech International Conference - Modern Technologies in Industrial Engineering

Gaiceanu, M.^1 ; Epure, S.^1 ; Ciuta, S.^2

Dunarea de Jos University of Galati-Romania, Department of Automation and Electrical Engineering, Domneasca Street, No. 47, Galati

800008, Romania^1

SC Galfinband SA, Smardan 2A, Galati, Romania^2

关键词: Asynchronous machine;    Bi-directional power flows;    Experimental prototype;    Photovoltaic panels;    Space Vector Modulation;    Static power converters;    Third order harmonics;    Three phase voltage;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/145/4/042027/pdf
DOI  :  10.1088/1757-899X/145/4/042027

来源: IOP

【 摘 要 】

The main objective is to achieve an elevator prototype powered by a three-phase voltage system via a bidirectional static power converter ac-ac with regenerating capability. In order to diminish the power size of the electric motor up to 1/3 of rated power, the elevator contains two carriages of the same weight, one serving as the payload, and the other as counterweight. Before proper operation of the static power converter, the capacitor must be charged at rated voltage via a precharge circuit. At the moment of stabilizing the DC voltage at nominal value, the AC-AC power converter can operates in the proper limits. The functions of the control structure are: the load control task, speed and torque controls. System includes transducers for current measuring, voltage sensors and encoder. As reserve power sources the hybrid battery-photovoltaic panels are used. The control voltage is modulated by implementing four types of pulse width modulations: sinusoidal, with reduced commutation, third order harmonic insertion, and the space vector modulation. Therefore, the prototype could operates with an increased efficiency, in spite of the existing ones. The experimental results confirm the well design of the chosen solution. The control solution assures bidirectional power flow control, precharge control, and load control and it is implemented on a digital signal processor. The elevator capacity is between 300-450 kg, and it is driven by using a 1.5 kW three-phase asynchronous machine.