Designing of the Cooling System and Calculation of Thermal State of the Traction Generator with Excitation from Permanent Magnets

Designing a permanent magnet synchronous motor (PMSM) of a winch drive needs to take into account the features of this machine. The engine has an inverted design with limited dimensions, is powered by a fre-quency converter, runs at the nominal power frequency and nominal load without using the damping winding and frequency start, and provides the required range of rope winding speeds. There is no specialized engi-neering design methodology for the winch drive PMSM. It is required to make changes and additions to the existing methods of designing synchronous machines when solving the problem of designing a winch drive PMSM. Design and validation calculations were performed in the Mathcad environment based on the tech-nique of designing machines with V.A. Balagurov’s permanent magnets and methods of designing general-purpose industrial synchronous machines with electromagnetic excitation. Field models of PMSM were used for modelling electromechanical processes and thermal status. The developed technique of designing the winch drive permanent magnet inverted motor is different from the known methods and due to this allows accounting for the design features of PMSM in the calculation of the size of the machine, the magnets, the stator core, the choice of electromagnetic loads, the design of the stator winding, the choice of the cooling system and the steel grade of the stator core. The specific requirements of the technical specification are taken into account when calculating the number of poles and the frequency of the supply voltage. A design project of the inverted PMSM of the winch drive has been developed. And the paper presents the design and verification calculations results. The reliability of the results was checked by field modeling of electromechanical processes and the thermal state of the PMSM. The study has solved the problem of no specialized engineering design techniques of the winch drive PMSM. The technique can be used by electromechanical engineers in solving the problem of designing winch drive PMSM as it allows making a design project of the PMSM corresponding to the requirements of the technical specifications and operation feature.

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Definition of the Transfer Function Parameters of Asynchronous Motor as an Object of Temperature Control

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.698.124 ◽

2014 ◽

Vol 698 ◽

pp. 124-130 ◽

Cited By ~ 3

Author(s):

Alexander Pugachev ◽

Galina Fedyaeva

Keyword(s):

Induction Motors ◽

Transfer Functions ◽

Thermal State ◽

Cooling System ◽

Asynchronous Motor ◽

Experimental Investigations ◽

Thermal Processes ◽

Variable Speed ◽

Heating And Cooling ◽

Definition Of

The analysis and systematization of research methods of thermal state of induction motors including traction ones is done. It is shown that for each type of motor it is necessary to develop its own mathematical model of thermal processes, and its verification should be carried out only on the basis of experimental investigations. The structure and operating principles of the complex developed physical model of the traction electric drive with induction motors is represented. The motors have a cooling system with variable-speed electric fan and subsystem of measurement and recording of monitored parameters. The method and the results of experimental study of the processes of heating and cooling of the induction motor are illustrated. Transfer functions and approximation curves of transients are proposed, their parameters are defined.

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Application of ANSYS software package for electromagnetic and thermal analysis of the electric motor of the pilger mill drive seamless pipe manufacturing technology

Omsk Scientific Bulletin ◽

10.25206/1813-8225-2020-173-57-66 ◽

2020 ◽

pp. 57-66

Author(s):

B. I. Kosimov ◽

Keyword(s):

Thermal Analysis ◽

Critical Condition ◽

Permanent Magnets ◽

Thermal State ◽

Inertial Mass ◽

Optimization Methods ◽

Electrical Equipment ◽

Design System ◽

Technical Solution ◽

Pilger Mill

Currently, the metallurgical production contains a large number of morally and physically outdated electrical equipment that requires modernization. Large capital expenditures are required to replace it. For this reason, it is slow to implement, long-term use for the purpose of payback, and slowly decommissioned. In this regard, the new equipment should be innovative and in many ways ahead of the existing level of development of the industry. The article offers such a solution for the company PJSC «Chelyabinsk pipe rolling plant». To replace the existing collector motor of the pilger mill drive for the manufacture of seamless pipes, which has been operating since 1928 and is in critical condition, a large-size low-speed valve motor with a large built-in inertial mass, having a permanent magnet magnetic system and claw-poles, is proposed to replace the existing collector motor of the pilger mill drive for the manufacturing of seamless pipes, which has been operating since 1928 and is in critical condition. Such a technical solution for drives of this class has not been used in the world. The motor eliminates the existing 120-ton flywheel, improves reliability due to contactless current supply, and reduces operating costs by eliminating excitation losses. The design of the engine allows its assembly without additional technological equipment, which is very important for large engines with permanent magnets. To develop a unique motor, a design system consisting of a synthesis subsystem and an analysis subsystem was created. The synthesis subsystem implements multi-level single-criteria optimization. As a result of its work, the optimal geometry is determined according to the selected criterion. The analysis system confirms the accuracy of the calculation using simplified optimization methods and finally removes technical risks before manufacturing an industrial design. It is based on the Ansys Electronics Desktop and Ansys Icepak systems that are well-developed for CAE electric machines. The analysis has several stages and includes electromagnetic and thermal analysis. The proposed design system is tested on a real project and implemented as a calculation of the magnetic and thermal state with dynamic load in JSC «Russian electric motors»

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High Temperature Magnetic Sensors for the Hot Section of Aeroengines

Aerospace ◽

10.3390/aerospace8090261 ◽

2021 ◽

Vol 8 (9) ◽

pp. 261

Author(s):

Edward Rokicki ◽

Radoslaw Przysowa ◽

Jerzy Kotkowski ◽

Paweł Majewski

Keyword(s):

Gas Turbines ◽

Heat Dissipation ◽

Permanent Magnets ◽

Elevated Temperatures ◽

Health Management ◽

Cooling System ◽

Magnetic Measurements ◽

Magnetic Sensors ◽

Blade Vibration ◽

Inductive Sensor

Magnetic sensors are widely used in aeroengines and their health management systems, but they are rarely installed in the engine hot section due to the loss of magnetic properties by permanent magnets with increasing temperature. The paper presents and verifies models and design solutions aimed at improving the performance of an inductive sensor for measuring the motion of blades operated at elevated temperatures (200–1000 °C) in high pressure compressors and turbines. The interaction of blades with the sensor was studied. A prototype of the sensor was made, and its tests were carried out on the RK-4 rotor rig for the speed of 7000 rpm, in which the temperature of the sensor head was gradually increased to 1100 °C. The sensor signal level was compared to that of an identical sensor operating at room temperature. The heated sensor works continuously producing the output signal whose level does not change significantly. Moreover, a set of six probes passed an initial engine test in an SO-3 turbojet. It was confirmed that the proposed design of the inductive sensor is suitable for blade health monitoring (BHM) of the last stages of compressors and gas turbines operating below 1000 °C, even without a dedicated cooling system. In real-engine applications, sensor performance will depend on how the sensor is installed and the available heat dissipation capability. The presented technology extends the operating temperature of permanent magnets and is not specific for blade vibration but can be adapted to other magnetic measurements in the hot section of the aircraft engine.

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MOTORS FOR TRAM DRIVES

Transport ◽

10.3846/16484142.2005.9637999 ◽

2005 ◽

Vol 20 (2) ◽

pp. 73-77 ◽

Cited By ~ 1

Author(s):

Tadeusz Glinka ◽

Barbara Kulesz ◽

Mieczysław Jakubiec

Keyword(s):

Induction Motor ◽

Permanent Magnets ◽

Cooling System ◽

Dc Motor ◽

Variable Speed ◽

Variable Speed Drives ◽

Brushless Motor ◽

Slip Ring ◽

Comparison Criteria ◽

Cage Induction Motor

This paper compares five different motor types used in variable speed drives: a dc motor with a mechanical commutator and with electromagnetic or permanent magnets excitation, a cage induction motor, asynchronous cascade with a slip‐ring motor and a brushless motor with PM excitation. These motors are to be used for tram drive and they should all be characterised by identical external dimensions and a cooling system. Rated power and efficiency are the principal comparison criteria.

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Automation of the cooling system for an internal combustion engine by programming a controller and using a thermal state control system

Automation. Modern Techologies ◽

10.36652/0869-4931-2020-74-4-160-164 ◽

2020 ◽

pp. 160-164

Keyword(s):

Control System ◽

Internal Combustion Engine ◽

Thermal State ◽

Cooling System ◽

Combustion Engine ◽

Internal Combustion ◽

State Control ◽

Control Automation ◽

Engine Coolant ◽

Liquid Pump

The issues of cooling control automation for an internal combustion engine (ICE) of cars and trucks are considered. An algorithm for controlling the number of revolutions of the electric motors for the liquid pump and the radiator fan, depending on the temperature of the internal combustion engine coolant is proposed. This algorithm is stir up by the Arduino MEGA 2500 microcontroller in conjunction with the motor driver. The automatic control system for the thermal state of the internal combustion engine will reduce fuel consumption, wear of the cylinderpiston group, as well as the emission of harmful substances into the atmosphere.

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Methods for Determining the Thermal State of Medium-Speed Diesel Engines Taking into Account Boiling of the Coolant

Proceedings of Higher Educational Institutions Маchine Building ◽

10.18698/0536-1044-2020-7-22-28 ◽

2020 ◽

pp. 22-28

Author(s):

L.L. Myagkov ◽

V.M. Sivachev

Keyword(s):

Heat Transfer ◽

Diesel Engine ◽

Diesel Engines ◽

Thermal State ◽

Cooling System ◽

Fatigue Cracks ◽

Cylinder Liner ◽

Thermal Factor ◽

Medium Speed ◽

Thermal Fatigue Cracks

Forcing medium-speed diesel engines by increasing the mean effective pressure leads to an increase in the thermal factor of the engine parts. High temperatures of the cylinder head fire deck and the cylinder liner working surface cause thermal fatigue cracks in these parts as well as piston scuffing. Therefore, the development of new methods of intensifying heat transfer in the cooling gallery and refined methods for determining the engine parts thermal state is currently relevant. In both areas of research, a significant role is played by the process of coolant boiling, which significantly intensifies heat transfer in the cooling system. A review of the literature showed that the existing methods of mathematical modeling of conjugate heat transfer in the cooling cavities taking into account the boiling process have a number of significant drawbacks. This paper presents the developed mathematical model and methods for determining the thermal state of medium-speed diesel engine parts taking into account boiling of the coolant, thus making it possible to combine the advantages of both the engineering approach and numerical simulation based on computational fluid dynamics. The thermal state of a new generation medium-speed diesel engine D500 was calculated and the thermal factor of the main engine parts was estimated.

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Efficiency of Application of Evaporative Cooling of Graphite Electrodes to Reduce their Consumption in Arc Furnaces

Materials Science Forum ◽

10.4028/www.scientific.net/msf.946.444 ◽

2019 ◽

Vol 946 ◽

pp. 444-449 ◽

Cited By ~ 1

Author(s):

Igor M. Yachikov ◽

Irina V. Portnova ◽

Mikhail V. Bystrov

Keyword(s):

Direct Current ◽

Thermal State ◽

Cooling System ◽

Evaporative Cooling ◽

Graphite Electrodes ◽

Arc Furnaces ◽

Three Phase ◽

Evaporative Cooling System ◽

The Cost ◽

Small Capacity

A significant part of the cost of released products in the smelting of steel is the cost of graphite electrodes, so reducing their specific consumption is an urgent task. The aim of the work is to study on a computer model and analyze the efficiency of using evaporative cooling to reduce the consumption of graphite electrodes in electric arc furnaces of three-phase alternating and direct current of small capacity. A computer simulation of the thermal state and fame of graphite electrodes for arc furnaces of three-phase and direct current with the capacity of 12 tons was performed. The efficiency of using evaporative cooling of graphite electrodes was revealed. It is established that for arc furnaces operating on direct and three-phase alternating current, the use of electrodes water cooling allows to reduce the consumption of graphite by about one and a half times. It is established that the water supply to the evaporative cooling system is the most rational during 1–2 minutes after the current is turned on. The use of evaporative cooling of graphite electrodes in arc furnaces can be recommended to reduce their consumption on operating and designed small capacity alternating and direct current arc furnaces.

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Influence of transition modes of blast-furnace smelting to change the temperature of the cooling-system plates

Metallurgicheskaya i gornorudnaya promyshlennost ◽

10.33101/s065456789 ◽

2018 ◽

pp. 3-9

Author(s):

V.V. Horupakha ◽

Yu.S. Semenov ◽

E.I. Schumelchyk ◽

S.V. Vashchenko ◽

E.D. Vyshinskaya

Keyword(s):

Blast Furnace ◽

Natural Gas ◽

Thermal State ◽

Cooling System ◽

Furnace Operation ◽

Operating Conditions ◽

The Body ◽

Blast Furnace Smelting ◽

Operating Modes ◽

Furnace Smelting

Purpose. Estimation of the influence of non-stationary blast-furnace smelting on the thermal state of the cooling system. Methodology. Analysis of changes in the meanings of thermocouples installed in the body of the cooling system plates, under different operating conditions of the blast furnace. Results. The study of the influence of transitional modes of blast-furnace smelting on the temperature change of the cooling-system plates at the joint use of natural gas and coal-pulverized fuel, under conditions of a low-intensity blast furnace operation and using pulverized coal with a consumption of more than 110 kg/ton of pig iron. Findings. The peculiarities of the influence of transitional modes of blast-furnace smelting on the thermal state of the cooling system are established: incl. with various fuel additives for blasting and with the operation of the furnace with reduced intensity. Practical value. The results presented in the article can be used in the design of the cooling system, as well as in the selection of rational operating modes of the blast furnace. Keywords. blast furnace, PCI technology, natural gas, cooling-system plates, thermocouple.

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