scholarly journals Review of the Modelling Methods of Series Wound DC Motors

2020 ◽  
Vol 13 (1) ◽  
pp. 166-169
Author(s):  
Attila Szántó ◽  
András Szántó ◽  
Gusztáv Áron Sziki
Keyword(s):  
Measurement System ◽  
Technological Development ◽  
Road Transport ◽  
Measurement Procedure ◽  
Hybrid Vehicles ◽  
Technical Parameters ◽  
Dc Motors ◽  
Different Types ◽  
Measurement And Testing ◽  
Modelling Methods

AbstractThanks to technological development and ever-increasing environmental regulations, electric and hybrid vehicles are playing an increasingly important role in road transport. An important part of these vehicles is the electric motor, several different types of which are utilized in modern vehicles. One of these types is the series wound DC motor. In this publication, we review the different modelling methods of the above motor type. On the basis of the models we can perform the simulation in MATLAB/Simulink environment. We also present the technical parameters and characteristics that are needed to run the simulation, and the measurement procedure for determining them. Finally, we present the measurement system we have developed for the measurement and testing the motors.

scholarly journals Design of a Measuring System Suitable for Measuring the Electromagnetic and Dynamic Characteristics of Electric Motors

2021 ◽  
Vol 15 (1) ◽  
pp. 99-102
Author(s):  
Attila Szántó ◽  
Roland Décsei ◽  
Márton Kujbus ◽  
Levente Fejes ◽  
Nóra Papcsák ◽  
...  
Keyword(s):  
Test Bench ◽  
Dynamic Testing ◽  
Technological Development ◽  
Road Transport ◽  
Hybrid Vehicles ◽  
Measuring System ◽  
Electric Motors ◽  
Motor Test ◽  
Different Types ◽  
Complex Measuring

Abstract Thanks to technological development, and the more and more strict environmental regulations, electric and hybrid vehicles are playing an increasingly important role in road transport. An important part of these vehicles is the electric motor, which has several different types that are applied in modern vehicles. To perform the simulation of the motors, it is important to measure their basic electromagnetic and dynamic parameters, since they are usually not provided by the manufacturers. For the above measurements a complex measuring system is needed. This motor test bench is also suitable for the static and dynamic testing of different types of electric motors. In this publication the layout of our own developed test bench is presented.

scholarly journals Case Study on Fire Resistance of Sandwiches for Means of Transport

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 207
Author(s):  
Pavel Koštial ◽  
Zora Koštialová Jančíková ◽  
Robert Frischer
Keyword(s):  
Fire Resistance ◽  
Fire Protection ◽  
Public Transport ◽  
Hybrid Vehicles ◽  
Safety Requirements ◽  
Different Types ◽  
Aluminum Honeycomb ◽  
Heat Loads

These days there are undeniably unique materials that, however, must also meet demanding safety requirements. In the case of vehicles, these are undoubtedly excellent fire protection characteristics. The aim of the work is to experimentally verify the proposed material compositions for long-term heat loads and the effect of thickness, the number of laminating layers (prepregs) as well as structures with different types of cores (primarily honeycomb made of Nomex paper type T722 of different densities, aluminum honeycomb and PET foam) and composite coating based on a glass-reinforced phenolic matrix. The selected materials are suitable candidates for intelligent sandwich structures, usable especially for interior cladding applications in the industry for the production of means of public transport (e.g., train units, trams, buses, hybrid vehicles).

The thrust measurement system research for combined nozzle in small space

2018 ◽  
Vol 41 (4) ◽  
pp. 1149-1159
Author(s):  
Yonghua Lu ◽  
Jing Li ◽  
Xiang Zhang ◽  
Yang Li
Keyword(s):  
Measurement System ◽  
Force Sensor ◽  
Test Method ◽  
Small Space ◽  
System A ◽  
Calibration Experiment ◽  
Different Types ◽  
Thrust Measurement ◽  
Nozzle Thrust ◽  
Thrust Forces

For measuring the thrust of combined nozzles in satellite thruster with a small space, the test method that the nozzle directly sprays on the load baffle is employed in this paper. The key problem is how to design the positions of 10 load baffles and how to construct the measurement system. A set of complete and automatic nozzle thrust measurement system is designed and built, and the influence of the load baffle applied on the flow field of nozzles is analyzed using the software FLUENT. Furthermore, the load surface locations of the sensors for the different types of nozzles are analyzed. We draw the conclusion that the load baffle position should range from 4–8 mm for the I-type nozzle and range in 6–12 mm for II-type and III-type nozzle. The correction coefficients of the thrust forces for all channels of the measurement system are determined in the calibration experiment. The uncertainty of measurement system is estimated and the error source of the measurement system is traced. We found that the systematic uncertainty is mainly contributed by the A-type uncertainty which is related with the nozzle dimension and its inner structure. The B-type uncertainty of system is contributed by the force sensor.

scholarly journals Socioeconomic impacts with the implementation of the railroad EF-118 RJ/ES: comparison of cargo logistics at the Port of Açu

2020 ◽  
Vol 9 (9) ◽  
pp. e995998389
Author(s):  
Matheus Novaes Valinho ◽  
Jhenifer Terezinha Aparecida Mattos Cescon ◽  
Ana Paula Roem Simoni ◽  
Lucília de Lourdes Pellozo Zambrotti
Keyword(s):  
Road Transport ◽  
Rail Transport ◽  
Industrial District ◽  
Socioeconomic Impacts ◽  
Significant Growth ◽  
Considerable Advantage ◽  
Cargo Handling ◽  
Different Types ◽  
Approximate Cost ◽  
The Cost

Since the beginning of operations in 2014, Port of Açu has shown significant growth in relation to cargo handling, with all demand dependent on road transport. However, there is a proposal for the implementation of the EF-118 railway that would interconnect Rio de Janeiro and Vitória, serving the region of Port. This work seeks to economically evaluate the advantages of the implementation of the railway modal compared to the roadway already used in the region. Due to the intense flow of cargo in the Industrial-Port Complex, the possibility of building a new highway, the RJ-244, is being studied, extending from the industrial district to BR-101. For this purpose, surveys were conducted to determine the average daily volume of vehicles circulating in the region, in addition to the different types of cargo transported and their relationship with Port. Based on the information collected in the Traffic Studies Report issued, it was possible to relate data and achieve at the value of the average annual daily volume for each category of cargo handled in the Port. Bearing in mind that in 2019, Port of Açu handled approximately 751 thousand tons of cargo and analyzing the estimated costs by ABIFER for road and rail transport, the approximate cost values for each one per ton of cargo per kilometer were reached. Comparing values, it is possible to notice that the cost of transporting cargo by rail corresponds to about 16.6% of the amount spent on transporting of the same weight of cargo by road, which means a considerable advantage for its implementation.

Analysis of Multi-Channel Virtual Temperature Measurement System Hardware Design and its Uncertainty

2012 ◽  
Vol 220-223 ◽  
pp. 1423-1426
Author(s):  
Ke Qin Liu ◽  
Xue Tao Pan ◽  
Jian Wen Cai
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Virtual Instrument ◽  
Measurement Range ◽  
Platinum Resistance ◽  
Total Uncertainty ◽  
Technical Parameters ◽  
Calculation Results ◽  
Virtual Temperature ◽  
Temperature Measurement System

According to a number of issues in the traditional temperature measurement, the multi-channel temperature measurement system based on virtual instrument is developed. In terms of measurement range and accuracy, Integrated Temperature Sensor TMP36, platinum resistance Pt100, and K-type thermocouple are selected to achieve multi-point temperature measurement, signal conditioning circuit is designed to match with every sensor. On this basis, combined with the technical parameters of each component, by means of the theory of uncertainty, analysis of the total uncertainty of system has been made. The calculation results show that the selection of each component for the temperature measurement system is reasonable, which can completely meet the measurement requirements.

scholarly journals Liquid Biopsy as Novel Tool in Precision Medicine: Origins, Properties, Identification and Clinical Perspective of Cancer’s Biomarkers

Diagnostics ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 215 ◽  
Author(s):  
Diego Fernández-Lázaro ◽  
Juan Luis García Hernández ◽  
Alberto Caballero García ◽  
Alfredo Córdova Martínez ◽  
Juan Mielgo-Ayuso ◽  
...  
Keyword(s):  
Liquid Biopsy ◽  
Medical Oncology ◽  
Technological Development ◽  
Therapeutic Strategies ◽  
Clinical Perspective ◽  
Non Invasive ◽  
Innovative Methodology ◽  
Different Types ◽  
Molecular Information ◽  
Knowledge Of Cancer

In recent years, there has been an increase in knowledge of cancer, accompanied by a technological development that gives rise to medical oncology. An instrument that allows the implementation of individualized therapeutic strategies is the liquid biopsy. Currently, it is the most innovative methodology in medical oncology. Its high potential as a tool for screening and early detection, the possibility of assessing the patient’s condition after diagnosis and relapse, as well as the effectiveness of real-time treatments in different types of cancer. Liquid biopsy is capable of overcoming the limitations of tissue biopsies. The elements that compose the liquid biopsy are circulating tumor cells, circulating tumor nucleic acids, free of cells or contained in exosomes, microvesicle and platelets. Liquid biopsy studies are performed on various biofluids extracted in a non-invasive way, and they can be performed both from the blood and in urine, saliva or cerebrospinal fluid. The development of genotyping techniques, using the elements that make up liquid biopsy, make it possible to detect mutations, intertumoral and intratumoral heterogeneity, and provide molecular information on cancer for application in medical oncology in an individualized way in different types of tumors. Therefore, liquid biopsy has the potential to change the way medical oncology could predict the course of the disease.

Perception of Building Occupants on the use of Generating Sets

2017 ◽  
Vol 13 (6) ◽  
pp. 300
Author(s):  
A.B Wahab
Keyword(s):  
Environmental Sustainability ◽  
Technological Development ◽  
Residential Buildings ◽  
Physiological Effect ◽  
Commercial Buildings ◽  
Generating Sets ◽  
Different Types ◽  
Major Bottleneck ◽  
Analyse Data ◽  
Quota Sampling

Poor power supply is a major bottleneck to the technological development of the country and this has forced building occupants to shift to dependence on generating sets of different types and brand which subject its users to myriad of effects. This study was aimed at assessing perception of the users of generators in buildings on the effects associated with its usage in Ibadan Metropolis, Nigeria. The study area was divided into core, transition and suburban residential zones. Multistage and quota sampling techniques were used to select respondents sampled in residential and commercial buildings respectively. Descriptive and inferential statistical techniques were used to analyse data collected. The study showed that 50.29%, 51.19%, 45.90% of residential buildings’ respondents in the core, transition and suburban zone while 56.41%, 43.33% and 42.86% of occupants of commercial buildings in the corresponding core, transition and suburban zone indicated that hearing problem was the most physiological effect that the use of generating sets exposed them to. Cut injuries from the elcetro-mechanical components of generating sets were the most prominent injuries had by the occupants of residential buildings while irritation of the eyes during refueling was the most significant effect had by respondents in the commercial buildings. High cost of fuel and damage to electrical appliances were the most uncomfortable indicator with uncomfortability index of 0.804 and 0.776 in residential and commercial buildings respectively. The study also found that the use of generating sets had caused structional, functional and aesthetical effects on the building elements. It was recommended that there is dire need on the part of government to enhance environmental sustainability by provision of sustainable energy sources to buildings in view of the effects associated with the use of generating sets.

scholarly journals Relation between grain-size and correlation length of snow

2002 ◽  
Vol 48 (162) ◽  
pp. 461-466 ◽  
Author(s):  
Christian Mätzler
Keyword(s):  
Grain Size ◽  
Correlation Length ◽  
Granular Media ◽  
Structural Information ◽  
Volume Ratio ◽  
Measurement Procedure ◽  
Different Types ◽  
Long Time ◽  
Points Of View ◽  
Two Parameters

AbstractIn the past it has often been difficult to compare results of different types of snow-structural information. Grain-size and correlation length are such parameters of granular media, and there exist different definitions and different measurement methods for both of them. The relation between these parameters is analyzed from theoretical and from experimental points of view, considering optical and microwave properties. For spherical ice grains the connecting formulas are simple, but for other shapes the two parameters are not directly related. Care must be taken in the measurement procedure. Especially if grain-size is regarded as the maximum extent of connected ice particles, the results are likely to lead to extreme overestimates. Therefore it is concluded that grain-size should be complemented by an additional size parameter, namely, the surface-to-volume ratio of equivalent spheres, i.e. a measure of the correlation length. Methods to determine this quantity in the laboratory have been known for a long time. Methods to obtain such measurements in the field are described here.

Public understanding of the environmental impact of road transport

2000 ◽  
Vol 9 (2) ◽  
pp. 165-174 ◽  
Author(s):  
Ben Lane
Keyword(s):  
Environmental Impact ◽  
Road Transport ◽  
Hybrid Vehicles ◽  
Public Understanding ◽  
Sustainable Transport ◽  
Policy Makers ◽  
The Public ◽  
Gas Fuel ◽  
The Uk ◽  
Common Misconceptions

Policy makers are hoping that the public will assist in the move toward a sustainable transport system by purchasing alternatively fueled vehicles (AFVs), many of which are now available in the UK. But if the public's knowledge-base of transport issues is low, it seems unlikely that consumer behavior will change sufficiently enough to solve the problems associated with high levels of traffic pollution. To assess the extent of popular understanding, an open-ended questionnaire has been used to investigate the perceptions of the British public on issues relating to transport. Topics include the environmental impact of vehicle emissions and the level of awareness of other alternative transport technologies such as natural gas, fuel-cell, and hybrid vehicles. The focus is to identify the most common misconceptions, with a view to improving educational programs designed to encourage the uptake of AFVs.

Sign in / Sign up

Export Citation Format

Share Document