EVALUATION OF THE IMPACT OF ENVIRONMENTAL HAZARDS ASSOCIATED WITH MECHANICAL FAULTS IN BLDC ELECTRIC MOTORS

2016 ◽  
Vol 15 (3) ◽  
pp. 491-504 ◽  
Author(s):  
Szymon Gontarz ◽  
Przemyslaw Szulim
Keyword(s):  
Environmental Hazards ◽  
Electric Motors ◽  
Mechanical Faults ◽  
The Impact

scholarly journals Geoinformation Technologies in Support of Environmental Hazards Monitoring under Climate Change: An Extensive Review

2021 ◽  
Vol 10 (2) ◽  
pp. 94
Author(s):  
Andreas Tsatsaris ◽  
Kleomenis Kalogeropoulos ◽  
Nikolaos Stathopoulos ◽  
Panagiota Louka ◽  
Konstantinos Tsanakas ◽  
...  
Keyword(s):  
Climate Change ◽  
Environmental Monitoring ◽  
Environmental Hazards ◽  
Geographic Information ◽  
Added Value ◽  
Spatial Data Analysis ◽  
Anthropogenic Factors ◽  
Geospatial Technologies ◽  
Main Challenge ◽  
The Impact

Human activities and climate change constitute the contemporary catalyst for natural processes and their impacts, i.e., geo-environmental hazards. Globally, natural catastrophic phenomena and hazards, such as drought, soil erosion, quantitative and qualitative degradation of groundwater, frost, flooding, sea level rise, etc., are intensified by anthropogenic factors. Thus, they present rapid increase in intensity, frequency of occurrence, spatial density, and significant spread of the areas of occurrence. The impact of these phenomena is devastating to human life and to global economies, private holdings, infrastructure, etc., while in a wider context it has a very negative effect on the social, environmental, and economic status of the affected region. Geospatial technologies including Geographic Information Systems, Remote Sensing—Earth Observation as well as related spatial data analysis tools, models, databases, contribute nowadays significantly in predicting, preventing, researching, addressing, rehabilitating, and managing these phenomena and their effects. This review attempts to mark the most devastating geo-hazards from the view of environmental monitoring, covering the state of the art in the use of geospatial technologies in that respect. It also defines the main challenge of this new era which is nothing more than the fictitious exploitation of the information produced by the environmental monitoring so that the necessary policies are taken in the direction of a sustainable future. The review highlights the potential and increasing added value of geographic information as a means to support environmental monitoring in the face of climate change. The growth in geographic information seems to be rapidly accelerated due to the technological and scientific developments that will continue with exponential progress in the years to come. Nonetheless, as it is also highlighted in this review continuous monitoring of the environment is subject to an interdisciplinary approach and contains an amount of actions that cover both the development of natural phenomena and their catastrophic effects mostly due to climate change.

scholarly journals OVERVIEW OF DISTANCE ENERGY TRANSMISSION MEANS FOR POWERING AGRICULTURAL MACHINERY TAKING INTO ACCOUNT FACTORS AFFECTING HUMAN SAFETY

2021 ◽  
Vol 4 (164) ◽  
pp. 10-13
Author(s):  
V. Halil ◽  
S. Zakurdai ◽  
V. Scurikhin ◽  
O. Donets ◽  
D. Zubenko
Keyword(s):  
Combustion Engine ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Electric Transport ◽  
Electric Motors ◽  
Agricultural Machinery ◽  
Transport Equipment ◽  
Agricultural Equipment ◽  
Electric Traction ◽  
The Impact

This article discusses the issues of autonomous operation of electrical agricultural equipment based on the transmission of electricity over a distance. The main point of this article is that tractors that work in the field are driven by electric motors, with the need to use expensive batteries. The issues of the impact and safety of this technology on the environment and humans are considered. The main problem of the creation, maintenance and operation of transport equipment, including agricultural equipment, is the high cost of maintenance and fuel, which are constantly increasing. In addition, the environmental problem, which has become so acute in recent years, global warming, the fuel crisis and the need to transfer all transport equipment to electric traction, make us look for new ways to solve the problem of environmental pollution and save resources, especially non-renewable energy sources. The use of electrical energy for traction of agricultural machinery that work in the fields or in other industries has been used for a long time, and in the early stages of the development of transport, it was electric transport that occupied the main part, before the invention of the internal combustion engine. Including at the Kharkov Tractor Plant there were developments (and still are), a prototype of the use of electric motors as the main unit for movement. Based on the above, it is obvious that electric traction for transport is obviously environmentally friendly and safe, although there are a number of limitations in this matter as well, but the unresolved problems of the limited use of the storage battery force us to look for new sources of energy. This article proposes to consider the possibility of using electric traction for agricultural machinery with the supply of operating tractors in the fields with the help of a directed electromagnetic wave with its transformation into electrical energy, which will be supplied to the electric motor.

A New Method for Fault Detection of Rotating Machines in Motion Control Applications Using PROFIdrive Information and Support Vector Machine Classifier

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Andre Luis Dias ◽  
Afonso Celso Turcato ◽  
Guilherme Serpa Sestito ◽  
Murilo Silveira Rocha ◽  
Dennis Brandão ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Motion Control ◽  
Diagnostic System ◽  
Operating Conditions ◽  
Support Vector ◽  
Electric Motors ◽  
Rotating Machines ◽  
Worst Case ◽  
Control Applications ◽  
Mechanical Faults

Abstract Electric motors are widely used in the industry. Several studies have proposed methods to detect anomalies in their operation, but always using sensors dedicated to this purpose. In this sense, this work aims to fill gaps in related works presenting a method for the detection of faults in rotating machines driven by electric motors in motion control applications using PROFINET network and PROFIdrive profile. The proposed method does not require any additional or dedicated sensors to provide data to the diagnostic system. Instead, the proposed methodology is based on the analysis of data transmitted in the communication network, which already exists for control purposes. Support vector machine (SVM) is used as a classifier of five different mechanical faults. The results provide that the methodology is feasible and efficient under different machine operating conditions, achieving, in the worst case, 97.78% efficiency.

Design of Hierarchic Platforms for Customizable Products

2002 ◽  
Author(s):  
Gabriel Hernandez ◽  
Janet K. Allen ◽  
Farrokh Mistree
Keyword(s):  
Product Family ◽  
Product Performance ◽  
Product Platform ◽  
Electric Motors ◽  
Product Platforms ◽  
Individual Product ◽  
Geometric Space ◽  
Multiple Levels ◽  
The Impact ◽  
Different Levels

The objective in product platform design is to synthesize a set of components that will be shared by a number of product variants considering potential sacrifices in individual product performance that result from parts sharing. A good platform strategy should allow us to specify different levels of commonality for the various features and components of the product family in order to reduce the impact of commonality on performance. In this paper, we formulate the design of platforms for customizable products as a problem of optimization of access in a geometric space. This approach allows us to develop systematically hierarchic product platforms with multiple levels of commonality. We illustrate the proposed approach with a case example: the design of a product platform for a line of customizable electric motors.

Mechanical Power in the Industrialization of Japan

1977 ◽  
Vol 37 (4) ◽  
pp. 935-958 ◽  
Author(s):  
Ryoshin Minami
Keyword(s):  
Technological Progress ◽  
Mechanical Power ◽  
Electric Motors ◽  
Industry Group ◽  
Rapid Industrialization ◽  
And Shifts ◽  
The Impact

The rapid industrialization of pre-war Japan depended upon extensive use of mechanical power. This dependence is studied quantitatively based on historical statistics of power for the years from 1890 to 1940. The introduction of engines (the change from human to mechanical power) and shifts in the kinds of engines (from water wheels to steam engines to electric motors) are clarified by industry group. The impact of these changes on technological progress in manufacturing is revealed.

scholarly journals Safe Transportation of Nuclear Fuel Assemblies by Means of Wheeled Robotic Platforms

2021 ◽  
pp. 43-50
Author(s):  
S. Alyokhina ◽  
I. Nevliudov ◽  
Yu. Romashov
Keyword(s):  
Nuclear Fuel ◽  
Movement Control ◽  
Time Algorithm ◽  
Nuclear Materials ◽  
Electric Motors ◽  
Materials Management ◽  
Lagrange Equations ◽  
Horizontal Movement ◽  
Major Attention ◽  
The Impact

Certain engineering problems concerning safety of the technological operations of the horizontal transportation of nuclear fuel within the enterprises’ sites were considered. Taking into account current trends in the introduction of robotic systems to reduce the impact of hazardous nuclear materials on personnel, the issue of automated control of the movement of the wheeled robotic platform, which can be used for horizontal transportation of nuclear fuel was studied. The major attention was paid to minimizing the transportation loads on nuclear fuel by means of decreasing the accelerations under its horizontal movement on the robotic wheeled transportation platform, which is a separate issue of the comprehensive safety problem of nuclear materials management. The research of horizontal movement safety of nuclear fuel by means of the robotic wheeled platforms was limited to defining transportation accelerations and was performed by computer simulations using mathematical models of dynamics and electro-mechanics. The mathematical model of the robotic transport wheeled platform loaded with nuclear fuel with the on-board accelerometer ensuring the required measurements necessary for an automated safe movement control system  was built in the form of the Lagrange equations of the second kind and the electro-mechanics equations of the direct current electric motors. The issue of ensuring smooth running during the displacement of a wheeled platform loaded with nuclear fuel was investigated, since especially in this mode the maximum accelerations are observed, which can lead to nuclear fuel damage. Computer simulation was performed using free Scilab software with open program code. It was demonstrated that due to the proper choice of the time algorithm of the voltage of electric motors, it is possible to ensure a small acceleration during the displacement of a robotic wheeled transport platform loaded with nuclear fuel. The obtained result substantiated the possibility of safe horizontal transportation of nuclear fuel on robotic wheeled platforms within the territories of enterprises, which will significantly reduce the harmful impact of hazardous nuclear materials on industrial personnel.

scholarly journals Problematika „environmentálních hazardů“ v geografickém vzdělávání

Envigogika ◽  
2014 ◽  
Vol 9 (2) ◽  
Author(s):  
Markéta Pluháčková
Keyword(s):  
Czech Republic ◽  
Local Level ◽  
Field Work ◽  
Environmental Hazards ◽  
Google Earth ◽  
Final Part ◽  
General Knowledge ◽  
Geographical Education ◽  
The Czech Republic ◽  
The Impact

This article deals with the topic of environmental hazards within geographical education. It describes how issues of environmental hazards at the local level can be communicated in education. The suggested method is project teaching divided into three levels. The first level aims at imparting general knowledge about a hazard and its appropriate terminology. The second level is based on protection against the hazard, and the last part deals with appropriate protection against the hazard in future. As an example, floods were chosen as a hazard that is very significant in the Czech Republic. The project presented here was partly performed using the Google Earth application that presents theoretical information applied in practice and includes some field work focused on the impact of previous floods. This project has been undertaken twice. An evaluation of the results can be found in the final part of this article.

The Impact of Race on Environmental Quality: An Empirical and Theoretical Discussion

1996 ◽  
Vol 39 (2) ◽  
pp. 231-248 ◽  
Author(s):  
Raquel Pinderhughes
Keyword(s):  
United States ◽  
Social Science ◽  
Social Science Research ◽  
Science Research ◽  
The United States ◽  
Environmental Hazards ◽  
Theoretical Perspectives ◽  
Pollution Problem ◽  
The Impact ◽  
The Relationship

The toxic pollution problem is composed of several interrelated parts which are involved in the process of production, use, and disposal of chemicals and products considered necessary for society. Each day, millions of pounds of toxic chemicals are used, stored, disposed of, and transported in and out of communities throughout the United States. Most Americans assume that pollution and other environmental hazards are problems faced equally by everyone in our society. But a growing body of research shows that the most common victims of environmental hazards and pollution are minorities and the poor. Disproportionate exposure to environmental hazards is part of the complex cycle of discrimination and deprivation faced by minorities in the United States. This article examines social science empirical research on the relationship between race, class, and the distribution of environmental hazards and the theoretical perspectives which have emerged to explain environmental inequities. The article also discusses the link between the environmental justice movement, which seeks to confront the causes and consequences of environmental inequities, and social science research on environmental inequity.

The impact of bearing shield wear on the power factor of ac electric motors

2020 ◽  
pp. 76-84
Author(s):  
Fedor M. Erkhan ◽  
Nikolay I. Korneychuk ◽  
Elena V. Bomeshko
Keyword(s):  
Power Factor ◽  
Air Gap ◽  
Research Purpose ◽  
Technological Equipment ◽  
Electric Motors ◽  
Measurement Tools ◽  
Useful Power ◽  
Support Surfaces ◽  
Rotor Bearings ◽  
The Impact

During the operation of AC electric motors, the seats under the rotor bearings are worn out. Wear of these surfaces leads to a change in the air gap between the rotor and the stator of the electric motor, which leads to an increase in the reactance and power loss. (Research purpose) The research purpose is in determining the maximum allowable amount of wear on the seats for the rotor shaft bearings of the support panels, in which their further use is impractical without restoring the seats. (Materials and methods) Electric motors of various technological equipment were chosen as the object of research. Universal control and measurement tools were used for micrometering. (Results and discussion) During the micrometering, it has been revealed for electric motors of the A2, A. 02, 4AS series that the wear of support surfaces made of aluminum alloys varies within 0,05-0,24 millimeter, and for surfaces made of cast iron within 0,06-0,20 millimeter. It was found that changing the air gap between the stator and the rotor leads to a change in the density of the magnetic flux distribution, and as a result, to a decrease in the power factor, efficiency and useful power on the motor shaft. (Conclusions) It is found that during the operation of asynchronous electric motors of various technological equipment, the wear of the support surfaces occurs within the range of 0,05-0,24 millimeter, which affects the power factor.

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