CALCULATION OF TRACTION AND ENERGY CHARACTERISTICS ELECTRIC ROLLING STOCK WITH ASYNCHRONOUS TRACTION ELECTRIC DRIVE

The issue of determining the traction and energy characteristics of electric rolling stock with asynchronous traction drive is considered. It is noted that such rolling stock can work at any point of the traction area, resulting in the need to determine the characteristics of the rolling stock for the entire traction area. The calculation of the characteristics of the traction induction motor, which are the basis for determining the traction and energy characteristics of the electric rolling stock, is considered in detail. A procedure based on the calculation of the replacement circuit of an induction motor is proposed. The calculation of power losses due to higher harmonic voltages and currents is considered. An example of calculation of traction and energy characteristics of an DC electric shunting locomotive with a traction asynchronous electric drive is given.

Traction electric drive based on fuel cell batteries and on-board inertial energy storage for multi unit train

The aim of the work is to study the possibility and features of the use of inertial storage devices in the traction electric drive of multi unit train with a power plant based on fuel cells. Methodology. The principle of power flow control in traction electric drives in the modes of acceleration and braking of rolling stock is proposed. The mathematical model of the traction electric drive in the form of the combination of three components: the train, the traction unit and the battery of fuel cells is developed. It was used to study the operation of a traction electric drive when solving a test traction task for rolling stock. Results. It is established that the use of inertial energy storage reduces hydrogen consumption by at least 25 %, which increases the mileage of rolling stock between equipment by more than 30 %. Originality. The traction electric drive on the basis of fuel elements and the inertial energy storage for the multi unit train is offered. The work of the proposed traction electric drive in solving the test traction problem for rolling stock is investigated. Practical significance. A mathematical model of the traction electric drive has been developed. The test traction problem for rolling stock is solved.

A METHODOLOGY TO SELECT ASYNCHRONOUS TRACTION ELECTRIC DRIVE FOR INNOVATIVE METRO ROLLING STOCK

The paper deals with the justification of the need to use an asynchronous traction electric drive on the metro rolling stock. The advantages of using an asynchronous traction electric drive in comparison with a DC commutator motor drive are formulated. The characteristics of modern innovative metro rolling stock with asynchronous traction electric drive of domestic and foreign production are analyzed. Aspects of the choice of a variable frequency asynchronous traction electric drive for innovative rolling stock are formulated and the existing typical algorithm of such choice is given. The main reasons for the irrational choice of traction asynchronous electric drive for the metro rolling stock are considered and the consequences of such a choice are analyzed. It is proposed to improve the methodology for selecting a variable frequency traction asynchronous electric drive for the metro rolling stock in terms of such an important operational factor as the specific cost of electrical energy for traction. The rational parameters of the variable frequency asynchronous traction electric drive according to the proposed procedure for the specified characteristics of the metro rolling stock are specified. The reserves of energy savings for the given conditions due to the introduction of an asynchronous traction electric drive with rational parameters on the innovative rolling stock are determined. It is established that the efficiency factor of the asynchronous traction motor significantly affects the specific electric energy consumption for the metro rolling stock traction and operating costs.

ESTIMATING THE PROBABILITY OF THE EMERGENCY OPERATION OF THE QUARRY ELECTRIC LOCOMOTIVE TRACTION ELECTRIC DRIVE

The paper deals with the problem of the assessment of the functionality of the multi-motor direct current traction electric drive of the quarry electric locomotive. The problem of the failure of electric drive motors because of extremely unsatisfactory state of the rail tracks and the wear of wheel pairs is analyzed. Taking into account the number of the existing repaired electric motors the probability of fitting up the traction electric drive with the electric motors with the widest electrical parameters variety is determined.

Synthesis of neuroregulator of power in system of sensorless traction electric drive

In this paper we solve the problem of synthesizing a power regulator in a traction electric drive system using artificial neural networks. To control the vehicle and obtain the desired quality of transients, neural network observers have been developed that allow the measurement of indirect parameters to determine the immutable coordinates of the system. For this purpose, this paper uses dynamic neural networks. When developing the neural network observer, experimental data obtained by the authors on an operating vehicle in real operating conditions are used. To test the effectiveness of using the created artificial neural network, an object is simulated with a random nature of the supply voltage change. A comparative analysis of transients in a system with a power neuroregulator and classical regulators in a subordinate control system shows a fairly high convergence of the results

Electromechanical Transmission of Skid Steer Loader

The article analyzes the power train components of skid steer loaders. The choice of the scheme and the design of the transmission units of the loader with a traction electric drive is substantiated. The results of calculating the traction characteristic of the straight-line movement of the loader taking into account different values of the coefficient of resistance to movement are presented.

Selection of Transmission and Electrical Motor Parts for ATVs

The article presents the results of calculations to justify the choice of transmission components and traction electric drive. The choice of the parameters of the gearing of the transfer case and differential has been substantiated. The choice of bearings is substantiated from the conditions of ensuring the given resource and strength for the transfer case and main gear.

EXPERIMENTAL STUDIES ON DETERMINING THE PARAMETERS OF ELECTRIC MOTORS OF THE QUARRY ELECTRIC LOCOMOTIVE TRACTION ELECTRIC DRIVE

Purpose. The purpose of the work is to conduct experimental studies to determine the parameters of DC motors of sequential excitation in dynamic modes of operation for use in setting up the control system of the electric drive. The paper presents the results of experimental studies to determine the parameters of the traction electric drive of direct current quarry electric locomotive. The research was conducted on the basis of Kremenchuk Mykhailo Ostrohradskyi National University with the use of a laboratory research stand with electromechanical equipment that simulates the operation of a traction drive, namely slippage of traction wheels when changing clutch conditions and differences in electrical parameters of traction motors. Methodology. The parameters were determined on the basis of a set of methods based on the measured instantaneous values of the state variables of the electric drive. The efficiency of application of the method of state space and the method which uses instantaneous values of current and voltage of the motor in the quasi-constant mode at power supply from the valve energy converter is proved. Results. The results obtained in the course of research indicate the possibility of calculating the parameters with an accuracy of 10 %. The verification of the obtained results is checked by subtracting the coefficient of determination and the sum of the squares of the deviations for the experimental data calculated on the basis of certain parameters. Originality. The accuracy of parameter determination is ensured by the use of instantaneous values of current and voltage at adjacent time intervals, and the voltage at the armature is formed by the control system and changes over time, ensuring the start of the motor with starting current limitation. Practical value. The developed computerized laboratory stand allows to measure instantaneous values of state variables and to carry out calculations of electric parameters of traction engines, and also to investigate static, power and dynamic operating modes of electromechanical transmissions of vehicles, both in regular operating modes, and to simulate various emergency operating modes, in particular. Figures 5, tables 2, references 7.