Increasing the cooling efficiency of power semiconductor devices

Grishchenko, A. V.; Kiselev, I. G.; Kornev, A. S.; Крылов, Д В

doi:10.3103/s1068371216050084

Cited by 8 publications

(1 citation statement)

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“…Ее применяют, когда естественная конвекция явля етс я малоэффективной. Для моделирования параметров нагрева и получения тепловых картин неисправностей выпрямительной установки проводился расчет параметров конвекции по стандартным методикам [4].…”

Section: расчет ребристого радиатора с принудительной конвекциейunclassified

Modeling the Processes of Thermal Diagnostics of Diesel Locomotive Rectifier

Кручек

Dvorkin

2023

Proceedings of Petersburg Transport University

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Purpose: To analyze the possibility of determining locomotive rectifier unit malfunction with the help of thermal fields and diode temperature measurement. Methods: There were applied the analysis of rectifier unit faults and their components for a certain period, modeling and thermal calculation in Solid Works Software Package. Results: The picture of thermal field and temperature changes at the diagnosis of regularly running diesel rectifier unit as well as at diode faults such as a breakdown and break. Practical significance: The possibility of monitoring the technical condition of a diesel locomotive rectifier unit when determining diode thermal fields as well as of determining possible malfunctions by diode temperature change is shown.

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Section: расчет ребристого радиатора с принудительной конвекциейunclassified

Modeling the Processes of Thermal Diagnostics of Diesel Locomotive Rectifier

Кручек

Dvorkin

2023

Proceedings of Petersburg Transport University

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Improving the energy efficiency of electric drives for auxiliary units of traction rolling stock

Титова

Евстафьев

Пугачев

2021

J. Phys.: Conf. Ser.

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The review of technical solutions and schematic characteristics of auxiliary drives for traction vehicles has shown that the most rational variant is an electric drive with an induction machine. Given the operating modes of the auxiliary drives and the share of their power consumption in the total locomotive power, the task of using scalar control systems for induction machines becomes relevant. Based on a mathematical model describing the dynamic energy conversion processes in the T-shape substitution circuit of an induction motor, taking into account stator steel losses and current displacement effects in the rotor winding and saturation along the main magnetic path, possibilities for reducing stator current have been investigated. In order to improve the energy efficiency of electric drives two variants of control system have been proposed. One based on search method of self-tuning to the stator current minimum and the other - on maintaining the power factor of induction motor at the level that ensures equality of active and reactive components of stator current. The hardware and software requirements for implementing control systems have been analysed. Modelling using Matlab has shown that both control systems work - power loss reduction can be as low as 50% and as high as 60% in certain modes.

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Thermomechanical voltages in the insulation of traction electric machines of locomotive

Grachev

Shrajber

2021

J. Phys.: Conf. Ser.

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In recent years, the production of locomotives in our country has increased significantly. At the same time, a lot of efforts are made to increase the power, reliability and efficiency of their work. One of the key components of any locomotive is electric traction machines, which are usually designed to the limit in order to obtain maximum torque and power density in the limited space of the rolling stock. Previously, this problem was solved by increasing the electromagnetic properties of materials, thermal conductivity of insulating materials. However, this path has exhausted the possibilities for increasing the efficiency of traction electric machines. As the design of traction electric machines improves, their level of functionality, reliability and durability increases, electric traction systems become more relevant and important for reducing the cost of materials, maintenance and ensuring traffic safety. The insulation state of the windings of traction electric machines mainly determines their reliability and performance, affects the service life and the cost of maintenance. Therefore, when designing a traction electric machine, it is important to take into account all operational factors that determine the optimal service life of a locomotive. The article discusses the effect of thermomechanical stresses in the insulation of traction electric machines on their reliability and durability.

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Increasing the cooling efficiency of power semiconductor devices

Cited by 8 publications

References 0 publications

Modeling the Processes of Thermal Diagnostics of Diesel Locomotive Rectifier

Modeling the Processes of Thermal Diagnostics of Diesel Locomotive Rectifier

Improving the energy efficiency of electric drives for auxiliary units of traction rolling stock

Thermomechanical voltages in the insulation of traction electric machines of locomotive

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