Study of time dependence and spectral composition of the signal in circuit of ac electric point motors

Abstract

Purpose. The paper is aimed to establish the dependence of changes in the time domain and spectral components of the current in the circuit of the AC electric point motor on its technical condition, to identify the common features for the same type of damage. It is necessary using the analysis of the received signals to carry out the remote diagnosis and determination of faults and defects of electric point motors. In addition it suggested to accelerate the process of the failure, malfunction and damage search. Authors propose the automated approach to the service of remote floor automation equipment, which is located in the envelope of trains. Reduction of the threat to life and health of staff by reducing the residence time in the zone of train movement. Reduce the impact of human factors on the result of service. Methodology. The paper studies the structure, parameters and characteristics, the operation and maintenance characteristics of the AC electric point motors. Determination of the main types of possible faults in the process depending on the operating conditions. Presentation of the electric motor as an object of diagnosis. Findings. The time dependences of the current in the circuit of electric point motor for its various states was obtained. The connection between the technical condition of electric point motor and the performance of current curve in time and spectral domains was established. The revealed deviations from the reference signal were justified. According to the obtained results it was made the conclusion. Originality. A method for diagnosing the state of the AC electric point motor by the time dependence and the spectral composition of the current in its circuit was proposed. The connection diagram to the motor windings based on non-infringement of electric parameters of connection circuit in the actual operating conditions was applied. Practical value. The obtained results suggest the possibility and feasibility of further development of the principles of remote diagnosis based on the analysis of temporal and spectral domains of the current curve in the circuit of the AC electric point motor. The implementation and practical application in operation as a separate system for the collection, analysis, processing and data communication is also real and rational. The given system makes possible tracking the changes in key parameters and forming the proposals on impact measures on the existing situation, as well as the ability to predict the state of the objects on the basis of the dependency determination of the previous changes.

Keywords

• electric motor
• switch
• turnout
• analysis
• diagnosis
• time-dependence
• spectral composition