Purpose: To substantiate the circuit design and algorithms for individual smooth automatic control of single-phase direct current electric locomotives according to laws constant traction force power without breaking locomotive circuits in order increase efficiency its drive with controllable motor excitation converters. As a solution, it is proposed apply electrical two rectifier-inverter conve...

The authors determined the intensity of increase in wear various elements body. It has been established that lower trim, roof slope and part side wall have greatest wear. is proposed to use aluminum alloys for modernization passenger car bodies. advantage such a technical solution an corrosion resistance reduction tare allows reduce specific train movement, fuel electricity costs traction. To o...

Three current paths are proposed, and theoretical analysis laboratory tests carried out to investigate the root causes of bearing failure in IGBT inverter-fed locomotives EMUs. The three types that run through drive unit bearings axle box used on EMUs electric classified as primary side path, main traction system path between vehicles EMU or locomotive it hauls. research found EDM caused by com...

Purpose: To consider the need for rational choice of values automatic control system (ACS) parameters by speed long freight train locomotive under condition ACS management necessary quality provision. Choosing method to solve task parametric synthesis and indicators. Finding rational, from view accepted assessment, trains various mass length. Methods: Methods mathematical simulation modeling, e...

anxiety symptoms have been reported to be present in many patients with diabetes mellitus. however, little is known about the effects of hyperglycemia in critical periods of the central nervous system development. we assessed locomotive, exploratory, and anxiety behaviors in adult rats that remained from infantile repeated hyperglycemia by the open field and elevated plus maze tests. our findin...

The use of diesel locomotives in transport is gradually decreasing due to electrification and the introduction high-speed electric rails. However, Korea, up 30% passenger cargo still relies on vehicles. Many studies have shown that exhaust gas from poses a threat human health. This study examined characteristics particulate matter (PM) locomotive engine exhaust. In previous study, PM emissions ...

Abstract The traction motor is the power source of locomotive. If surface waviness occurs on races bearing, it will cause abnormal vibration and noise, accelerate fatigue wear, seriously affect stability safety transmission. In this paper, an excitation model coupling time-varying displacement contact stiffness excitations adopted to investigate effect bearing under from locomotive-track couple...