JUSTIFICATION OF THE TRACTION CHARACTERISTIC AND THE PROBLEM OF CHOICE OF THE TROLLEYBUS ELECTRIC MOTOR AND ITS AUXILIARY POWER SOURCES

2012 ◽  
pp. 72-82
Author(s):  
Andrey Ivanovich Safonau
Keyword(s):  
Electric Motor ◽  
Power Sources ◽  
Auxiliary Power ◽  
Traction Characteristic

scholarly journals Dynamic Simulation and Control of a New Parallel Hybrid Power System

2020 ◽  
Vol 10 (16) ◽  
pp. 5467
Author(s):  
Po-Tuan Chen ◽  
Cheng-Jung Yang ◽  
Kuohsiu David Huang
Keyword(s):  
Fuzzy Logic ◽  
Power System ◽  
Internal Combustion Engine ◽  
Dynamic Simulation ◽  
Electric Motor ◽  
Fuzzy Logic Controller ◽  
Simulation Analysis ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Power Sources

To avoid unnecessary power loss during switching between the various power sources of a composite electric vehicle while achieving smooth operation, this study focuses on the development and dynamic simulation analysis of a control system for the power of a parallel composite vehicle. This system includes a power integration and distribution mechanism, which enables the two power sources of the internal combustion engine and electric motor to operate independently or in coordination to meet the different power-output requirements. The integration of the electric motor and battery-charging engine reduces the system complexity. To verify the working efficiency of the energy control strategy for the power system, the NEDC2000 cycle is used for the vehicle driving test, a fuzzy logic controller is established using Matlab/Simulink, and the speed and torque analysis of the components related to power system performance are conducted. Through a dynamic simulation, it is revealed that this fuzzy logic controller can adjust the two power sources (the motor and internal combustion engine) appropriately. The internal combustion engine can be maintained in the optimal operating region with low, medium, and high driving speeds.

Improved Durability and Cost-Effective Components for New Generation Direct Methanol Fuel Cells - DURAMET Project

2014 ◽  
Vol 93 ◽  
pp. 61-64
Author(s):  
A.S. Aricò
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Cost Effective ◽  
Power Sources ◽  
Auxiliary Power ◽  
Effective Components ◽  
Auxiliary Power Units ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Distributed Energy Generation

Direct Methanol Fuel Cells (DMFCs) have been postulated as suitable systems for power generation in the fields of portable power sources, remote and micro-distributed energy generation, and auxiliary power units (APU). The main objective of the DURAMET project ((http://www.duramet.eu) is to develop cost-effective components for DMFCs with enhanced activity and stability in order to reduce stack costs and improve performance and durability. The project concerns with the development of DMFC components for application in auxiliary power units and portable systems.

Gas-Turbine Application in U. S. Coast Guard Vessels

1963 ◽  
Author(s):  
Robert C. Case ◽  
James M. Logan
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Gas Turbines ◽  
Coast Guard ◽  
Weight Space ◽  
Power Sources ◽  
Auxiliary Power

This paper is a summarization of the application of gas turbines for Coast Guard shipboard use. Included are discussions of turbine applications in present use and their results, vessels presently being built which will employ gas turbines, and possible future applications of gas turbines both for main and auxiliary power aboard Coast Guard vessels. Comparisons of gas turbines with other power sources as to weight, space, fuel consumption and economy are included for the presently known applications.

scholarly journals Small Vessel with Inboard Engine Retrofitting Concepts; Real Boat Tests, Laboratory Hybrid Drive Tests and Theoretical Studies

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2586
Author(s):  
Wojciech Leśniewski ◽  
Daniel Piątek ◽  
Konrad Marszałkowski ◽  
Wojciech Litwin
Keyword(s):  
Electric Motor ◽  
Theoretical Studies ◽  
Solar Panels ◽  
Hybrid Drive ◽  
Propulsion Systems ◽  
Power Sources ◽  
Hybrid Propulsion ◽  
Operating Range ◽  
Parallel Hybrid ◽  
Modern Technologies

The development of modern technologies and their increasing availability, as well as the falling costs of highly efficient propulsion systems and power sources, have resulted in electric or hybrid propulsions systems’ growing popularity for use on watercraft. Presented in the paper are design and lab tests of a prototype parallel hybrid propulsion system. It describes a concept of retrofitting a conventionally powered nine meter-long vessel with the system, and includes results of power and efficiency measurements, as well as calculations of the vessel’s operating range under the propulsion of its electric motor. The concept of adding of a solar panels array was studied.

Integration of thermoelectrics and photovoltaics as auxiliary power sources in mobile computing applications

2008 ◽  
Vol 177 (1) ◽  
pp. 239-246 ◽  
Author(s):  
Ali Muhtaroglu ◽  
Alex Yokochi ◽  
Annette von Jouanne
Keyword(s):  
Mobile Computing ◽  
Power Sources ◽  
Auxiliary Power

scholarly journals Clinical and Spectrophotometric Evaluation of LED and Laser Activated Teeth Bleaching

2016 ◽  
Vol 10 (1) ◽  
pp. 242-250 ◽  
Author(s):  
R. Lo Giudice ◽  
G. Pantaleo ◽  
A. Lizio ◽  
U. Romeo ◽  
G. Castiello ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Mean Value ◽  
Ease Of Use ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Power Sources ◽  
Chromatic Scale ◽  
Whitening Agent ◽  
Auxiliary Power ◽  
Before And After

Background: Auxiliary power sources (LED and laser) are used in in-office teeth bleaching techniques to accelerate the redox reaction of the whitening gel to increase ease of use, to improve comfort and safety, and to decrease the procedure time. Objective: The aim this study is to evaluate the efficiency of the teeth whitening procedures performed with hydrogen peroxide and carbamide peroxide, LED or Laser activated. Method: 18 patients, affected by exogenous dyschromia, were treated with a bleaching agent composed by 35% hydrogen peroxide and 10% carbamide peroxide. They were divided into two groups: in the first group the bleaching agent was activated by a LED lamp; in the second group it was activated by a Laser diode lamp. Both groups were subjected to 3 bleaching cycle of 15’ each. The chromatic evaluations were performed before and after one week from the treatment, using a chromatic scale and a spectrophotometer. The mean value of pre, post bleaching and follow-up were analyzed using a T-test, with results statistically significant for P<0,05. Results: Results showed that the variations in brightness, chroma and hue are significantly influenced by the interaction between the whitening agent and the original colour of the teeth. Laser-activation has marginally improved the bleaching effectiveness. All patients treated with laser activation complained an increase in dental sensitivity. Conclusion: The use of laser-activating systems did not improve the efficacy of bleaching.

scholarly journals Design and construction of an experimental test bench for the study of a mechanical system used for coupling power sources

2020 ◽  
Vol 30 (1) ◽  
pp. 1-8
Author(s):  
Irina DIACONU ◽  
◽  
Dinel POPA ◽  
Claudia Mari POPA
Keyword(s):  
Experimental Test ◽  
Electric Motor ◽  
Hybrid Electric Vehicle ◽  
Degrees Of Freedom ◽  
Test Bench ◽  
Power Sources ◽  
Mechanical Coupling ◽  
Coupling System ◽  
Electrical Components ◽  
Experimental Test Bench

This study investigates the experimental test bench specially created fortestingaplanetary mechanism with two degrees of freedom in the configuration of hybrid electric vehicle powertrain. For the experimental study, it was necessary to build a test bench that consists of a metal frame on which other mechanical and electrical components are positioned: the mechanical coupling system, the thermal engine, a three-phase electric motor and an alternator. The test bench can simulate road load, during which time it is measured with the help ofa torque sensor the mechanical moment developed by the electric motor used in this configuration.

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