IDENTIFICATION OF THE LOADING DEGREE OF THE TWO-SPEED LIFT

Abstract

Increase of comfortable transportation, energy efficiency, safety are priority technical and
economic indicators in the modernization of lift’s electric drives. Most of the lifts being operated are two- speed with a rather outdated elemental control system. . The transition from an unregulated system to a reg- ulated electric drive can significantly improve its technical characteristics, expand the functionality of the system, significantly reduce the amount of electricity consumed by the electric drive, and introduce energy- saving equipment and technologies, but at the same time, it needs a lot of money. Replacement of the outdated equipment of the control system of a two-speed electric drive on the modern allows at low material costs to get a lift that meets the high technical requirements and almost inferior to its parameters of the new kit. The main advantages of the electric drive with microprocessor-based automatic control system are high reliability, low operating costs and relatively low cost. . In that work proposed the method of determination a degree of loading of the lift depending on the starting parameters of the drive. Based on the research it was found that the determination of the degree of loading of the cab in the initial stage of the motion on the basis of transient processes at engine start-up makes it possible to improve the positioning accuracy by changing the start time of the braking and using the time delay. As a result of the performed mathematical and physi- cal experiments, it has been proved that the developed mathematical model of the stand can be used for modeling of the real parameters of the automated control system by electric drive of the lift. Based on the conducted experiments it was obtained that the identification method allows to determine the degree of load- ing of a two-speed lift with an error of ± 5% with known parameters of the elevator during the time of two
turnover of the motor shaft. Knowing the weight of the load this allows determine braking start time and ap-
proach of the lift’s cabin to a given stop height with minimal error which increases the comfort and quality
of movement of the lift’s cabin. Further research is planned to focus on detection the impact of the variability of electrical and mechanical parameters on the quality of identification.