Modernization methods are proposed for the auxiliary electrical equipment of streetcars, specifically for brake gears and door operators, that provide the desired parameters with the optimum use of resources allocated for control objectives. Design and schematic solutions for the electromechanical and semiconductor converter are also proposed. The objective of the current research is to discover the possibility of modernizing auxiliary streetcar equipment. Using the data of the Street Railway Department of Zlatoust (Russia), variants of failures during the operation of streetcars of old models are analyzed. It can be seen that the main failures are due to the brake and door equipment of a streetcar, which poses a problem for designers in the subsequent perfection and the development of electromechanical systems. As an example for the solution of the problems an electromechanical control system of the motion of a streetcar door is considered. To modernize door operators, among the considered variants of electromechanical converters, one of the most appropriate are thyratron electric motors. Based on the description of the process of the door-operator equipment, the electric functional diagram was developed, and the diagrammatic works were obtained. The synthesis of the control system is complicated that the drive is subjected to the temperature factor and operation in circuits with the great switching interference. The algorithm must take into account the possible variations in the supply voltage. The control-algorithm is presented in the form of a graph. The main cycle of the program algorithm constantly interrogates position sensors and incoming control signals from a street railway driver and, upon the entry of the signal, triggers the rotation of the electric motor in the desired direction. In orderto eliminate the inadvertent open of doors during the street-railway motion, the electrical drive has a latch controlled by a microprocessor. Also, protection in the contingency, such as jamming a passenger in a street-railway door, is effected. In the case of anything being jammed in a door, the microcontroller cuts off the supply of the electric motor, with it tripping the latch, giving a possibility of rolling the door by hand.
Control systems of auxiliary electric drives in streetcars
Steuersysteme für elektrische Hilfsantriebe in Straßenbahnen
Russian Electrical Engineering ; 81 , 4 ; 191-194
2010
4 Seiten, 7 Bilder, 3 Quellen
Article (Journal)
English
Anwendungsbeispiele , Ausfallanalyse , elektromechanische Vorrichtung , elektromechanischer Antrieb , Elektromotor , Fahrzeugtür , Fehleranalyse , Graph , Halbleiterschaltung , Hall-Sensor , Hilfsantrieb , mathematisches Modell , Mikrocontroller , Modernisierung , Positionssensor , Regelalgorithmus , Regelungssynthese , Schneckengetriebe , Steuerungssystem , Störverhalten , Straßenbahn , Stromversorgung , Temperaturbereich , Türöffnungskraft
Online Contents | 2013
Streetcars and Economic Development: Do Streetcars Stimulate Employment Growth?
Transportation Research Record | 2018
|New Orleans: Perley Thomas Streetcars
British Library Online Contents | 1997
|