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This article is devoted to the issue of technical diagnostics in urban electric transport. To resolve the issue, it is necessary to translate the qualitative determination of the TS on some quantitative basis. The formalization of qualitative definitions is a necessary condition for the construction of formal (computable) diagnostic algorithms.
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... ensures the operation of the equipment with less expenditure of effort and means. A production base has been created in the rolling stock-operating organizations to ensure the traction rolling stock repair and its maintenance during operation. Most of the TM malfunctions over the research period are associated with damages at anchor and collector (Fig. ...
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Conveyor widely used in the industrial world such factories in the which have a function to move goods. The disadvantage of electric energy on the conveyor can the caused by the load, the motor, and time of conveyor operation. This research is focused on energy efficiency of electric motors on the conveyor with doing characterization of electric en...
Citations
... The model of vibrations can be represented as a system of connected nodes of which a direct current motor (DC motor) consists, we will call it oscillators. Due to the individual motor elements' masses, stiffness and damping factors for these elements, such as mechanical transverse excitation of the rotating armature, collector, fan, bearings, vibrations of brush holder, poles and column (for example, due to the movement of the object with DC motor) (Fig. 1), in modeling, we can observe the emergence of complex structures that can be described as a superposition of harmonic oscillations called normal oscillations [1][2][3][4][5][6][7][8][9][10]. ...
... Movement on the lower frequency ω2=(k/m) 1/2 (6) corresponds to the oscillations of both particles in phase. Noting that in (2), the motion does not depend on kc. ...
This article describes a vibration model connected by individual nodes of a DC motor. The purpose of the article is a mathematical model allowing to predict the work of machines with a depreciation resource and search for ways to increase the information content of assessing the functioning of the rolling stock condition without dismantling them. Currently, the operational reliability of the DC motor is reduced after the development of the service life. Study and evaluation of the vibration effect on the brush-collector node. The main components of the DC motor (bearings, electrical brushes) are unrecoverable. Therefore, any interference with their normal operation leads to premature wear of the entire DC motor. Existing methods for life-extending maintain the operational reliability of a DC motor equal or close to the passport data for several years. This model allows vibration diagnostics without dismantling the DC motor and stopping the rolling stock. The mathematical model describes the oscillations of each node of the DC motor in the direction of movement of the rolling stock, showing the excess of the permissible value. After mathematical processing of the results, a machine reliability model under study is obtained (usually in the form of polynomials) as a function of the needed parameters – the influencing factors. Due to this model, pre-detected defects can save on repairs and maintenance in the future. This model is the basis of software for online diagnostics. The proposed model allows providing an objective use of repair and restoration compositions depending on the current technical condition, which will lead to an increase in the service life of the mechanism and savings in operating costs. On the one hand, extending the operating life of a DC motor should produce an economic effect, and on the other hand, technical measures to maintain operational reliability cause an increase in material costs.
The paper presents a new approach to the selection of characteristic points on the current-voltage curve (CVC) of the brush contact of traction electric machines, for their approximation in the form of three different functions, with characteristic points of transition to the field weakening mode. The problem of raising resources by using new design electro brushes. This constructive solution is consistent with the specific types of traction motors used in urban and rail transport and satisfies the technical conditions for their operation. A construction brush holders, which will save the cost of electro, in connection with their wear and tear due to friction on the walls of the brush holders. Improving the quality of machines saves material means and human resources, increase the profitability of their use, resulting in a significant increase in productivity. The method of calculating the current-voltage characteristics of a new type electro brushes, the distinguishing feature of which is the introduction of a cross section of the body brush. In the course of the experiment revealed steadily increasing rate of proposed electro brushes, compared with the standard of the same type EG61A. Data collected during the experiment showed that electro brushes with a transverse incision is more stable contact with the collector.
The authors present a comprehensive test procedure for digital devices, based on the calculation and control of two or more characteristics of a binary signal at a control point. The procedure is aimed at how to increase the reliability of performance monitoring and localization of the failure of digital devices as part of automated versatile systems.
The paper discusses the methods of optimizing the troubleshooting parameters, based on a combination of heuristic algorithms with the linear integer programming method. The methods are aimed at minimizing costs when creating troubleshooting support for healthy condition monitoring and troubleshooting for in-service and recoverable electronic devices and equipment of electric power systems.
This paper covers the matter of troubleshooting in urban electric transport and electrical equipment. The solution to this issue requires transferring the qualitative determination of the health of the equipment to some quantitative basis. The formalization of qualitative definitions is a prerequisite for constructing formal (computable) troubleshooting algorithms.
