A Four Axle Shunting Electric Locomotive Control System Based on Inverter-Induction Motor Technology with Account of Slipping

The relevance of the paper lies in the possibility of using a computer model in the development and study in the processes in an electric locomotive traction electric drive asynchronous motors operation for various operating modes. The purpose of the paper is a four-axle locomotive mechanical features mathematical description, taking into account the slipping process, the development of a control system for the traction electric drive for an electric locomotive using the FC-AM electric drive configuration in condition of the slipping process and testing its performance on a computer model. For the four-axle electric locomotive derived equations and analyzed the conditions for the occurrence of slipping process, taking into account the pressure on 4 wheel sets with unloading and overload from traction, developed a new block diagram of the control system for the traction electric drive of an electric locomotive according to the FC-AM system configuration, its performance is tested on a computer model. The developed new control system for the traction electric drive of a four-axle electric locomotive makes it possible to use the engines to operate more efficiently, without bringing them to uncontrolled slipping and reducing the power consumption of the FC-AM system.

I. Introduction

Quantitative parameters for controlling the movement of a train along railway tracks related with the physical traction force of locomotives [1], implemented in accordance with the specified traction function [2]. Imperfect of rail tracks [3], unstable environment, torque redistribution on wheel sets when turning, uphill or downhill [4]–[6] leads to wheel sets slippage along the rail and the slipping occurrence of, leads to wear of the rails and wheels bandages [7], which increases the power consumption of the electric locomotive. The industrial shunting electric locomotive NPM2 [8], [9] developed by the Novocherkassk Electric Locomotive Plant specifically for use at the production site of PJSC Magnitogorsk Metallurgical Plant quipped by adjustable AC traction electric drives designed according to the FC-AM system [10] with an automatic control system based on microprocessor controllers [11], the new algorithms of which [12], [13] will make it possible to effectively use slipping in controlling the speed modes of wheel sets and the entire electric locomotive as a whole.