By Sergio Ferreira / Published on Thu, 2009-05-28 13:41
Is it possible to reduce the risk of electrically induced fires by 50% and reduce the cost of motor breakdown's and downtime?
This webinar will shed some light over a solution for preventive maintenance and fault identification in industrial applications as tool for cost saving/avoidance and performance improvement.
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By HDK / Published on Wed, 2009-05-27 08:10
The development of photovoltaic (PV) panels has made solar-powered pumps a reality. The pump drivers are usually direct-current (DC) motors, which are fed by power electronic converters with maximum power point tracking (MPPT) to extract the whole energy that the PV panels can generate, depending on environmental conditions including irradiation and temperature. The implementation of the MPPT algorithm essentially involves sensing both an input current and an input voltage. Understandably, such realisation is expensive.
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By Sergio Ferreira / Published on Fri, 2009-04-24 07:27
Leonardo ENERGY opens here a new series of policy briefing brochures with a sharp look to pertinent topics on the European energy agenda aiming at providing its users instruments to interpret these issues and have an objective opinion on them!
Motor Driven Systems account for about 50% of electricity consumed in Europe and represent a major potential for energy savings!
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By Sergio Ferreira / Published on Fri, 2009-02-06 10:06
Mandatory Energy Performance Standards (MEPS) are now being proposed for Electric Motors. To assist that process, this guide has been put forward under the IEA 4E - Electric Motor Systems Annex Project.
The purpose of the guide is to inform on new standards for electric motors that will facilitate trade of high efficient motors across the globe.
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By Isabelle Heriakian / Published on Wed, 2009-01-14 16:07
In this guide, a design engineer has to advise his industrial customer who plans to connect a new induction motor to the power supply system. Using the permissible level of voltage fluctuations, his methodology is described.
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By Angelo Baggini / Published on Mon, 2009-01-12 10:00
Year: 2007
Policy Status: In force
Eskom launched an
Energy Efficient Motors Programme in mid-2007.
The programme promotes the replacement of old,
inefficient motors with new, highly-efficient motors, through
subsidising the purchase cost.
Efficient motor suppliers registered with Eskom are directly paid the subsidy, resulting in an
immediate discount off the purchase price for the consumer. The subsidy aims to
smooth out the price difference between standard and high-efficiency motors. The purchaser must trade in their old motor, along with all components, for scrapping.
Subsidies are offered for 3 phase TEFC general purpose 4- and 2-pole induction motors ranging from
1.1 kW to 90 kW, meeting
Eff 1 standards (premium efficiency).
Motor efficiency ratings are based on European Union efficiency definitions, with Eff 1 being the most efficient, and Eff 3 being a standard motor. Subsidy amounts range from ZAR 400 to ZAR 3 500 depending on the motor replaced.
For motors to be subsidised, the suppliers must be accredited by Eskom, for the company's financial status and the motors' technical specifications to be verified and approved. Eskom Demand-side Management (DSM) will regularly perform random process compliance audits, while an independent measurement and verification body will verify the megawatt savings achieved by the programme.
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By Hans De Keulenaer / Published on Fri, 2008-12-12 16:16
Andrzej Kulakowski, Miroslaw Wcislik
The paper deals with a mathematical model of a sucking aggregate. The parameters of the aggregate has been identified. The model parameters depends on the angle of rotor rotation related to stator. There has been worked out a simulation model of the aggregate, also there have been carried out verifying research. A simulation analysis of the power loss in aggregate is presented.
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By Angelo Baggini / Published on Tue, 2008-09-23 09:00
Year: 2006
Policy Status: In force
Funded in part by the Australian Greenhouse Office, SEEEM promotes rapid market diffusion of high-efficiency motor component technologies and systems worldwide.
Launched on 20 June 2006, the SEEEM process will promote international agreement on testing procedures, efficiency classes and labelling schemes to enable product comparison worldwide. This will allow for international benchmarking and steps to align performance requirements (e.g., minimum energy performance standards) and to design/implement cost-effective policies and incentives to promote the most efficient motor systems.
To achieve its overall objective, the SEEEM community of practice has identified four areas for cooperative action:
- Efficiency testing procedures and tolerances
- Efficiency classes and marking schemes
- Mandatory and voluntary performance requirements
- Effective policies and incentives for energy efficient motor systems
The work under the first three areas will focus on motors and other system components, whereas the policy work will encompass motor systems as a whole. Participants in the SEEEM community of practice agree to:
- Establish three multi-stakeholder Working Groups to serve as open fora for SEEEM implementation.
- Information sharing and dissemination via the SEEEM website to report progress publicly.
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By Hans De Keulenaer / Published on Mon, 2008-09-22 09:56
Measurement investigations have been carried out for commutator dc motor with internal asymmetries. Construction of considered motor enables to realize the breaking of one rotor coil and shorting of two groups of rotor coils. Each group contains three rotor coils. The basis of study were signals: current and voltage of field winding, current and voltage of armature winding and velocity of the rotor. The presented in this paper results of spectral analysis of signals create new possibilities for diagnostics of commutator dc motor.
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By Angelo Baggini / Published on Mon, 2008-08-11 09:00
Year: 2007
Policy Status: In force
Many of the major energy-using products are globally traded goods and therefore to realise its goal of raising product standards, the UK Government has made a commitment 'to promote international cooperation on product labelling and standards':
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By Hans De Keulenaer / Published on Fri, 2008-07-25 12:09
By E Darie
This work analyses the operation of inverter-fed asynchronous motor drives accompanied by high-frequency interferences caused by parasitic currents of the common and differential modes. These emissions propagated by conduction and radiation may unfavorably affect the operation of nearby telecommunication and signal cables and various low-current devices. The study of these phenomena is based on theoretical considerations and numerical analysis.
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By Angelo Baggini / Published on Mon, 2008-06-30 09:00
Year: 2006
Policy Status: In force
Funded in part by the DEFRA-associated Market Transformation Programme, SEEEM promotes rapid market diffusion of high-efficiency motor component technologies and systems worldwide.
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By Angelo Baggini / Published on Wed, 2008-06-25 17:18
Leonardo Energy is developing a toolset of calculation instruments in order to help designers with practical information and tools.
The aim is to make electrical engineers life easier.
Three tools are currently available for download.
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By Hans De Keulenaer / Published on Tue, 2008-05-06 14:41
The mathematical model of dc motor was created. In model the commutator is approximated by circuit with variable parameters. Extremely different values are assigned to circuit parameters depending on the angular position of the rotor. Model equations were solved using implicit integration method. Commutation processes of dc motor were investigated with the aid of this model. Presented model can be extended and to take into account another phenomena occurring in dc motor.
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High Efficiency Motor Systems
By Sergio Ferreira / Published on Tue, 2008-03-25 07:50
High efficiency motor systems can save 202 TWh of electricity use per year for industry in Europe. This information center provides tools and guidance to realise this potential.
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By Angelo Baggini / Published on Thu, 2008-02-28 17:55
Motor driven systems account for approximately 50% of the electricity consumed in Europe. This kind of device is always characterised by a high efficiency, but considering the large amount of energy consumption, it’s evident how even a small efficiency improvement can lead to relevant energy savings.
Despite the huge energy savings opportunities, recent market research carried out in several countries pointed out that in European industry, efficient motors and motor systems are far from having a significant quota in today's operating equipment.
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By Isabelle Heriakian / Published on Mon, 2008-01-21 03:00
A new case study by :
Andreas Sumper, Roberto Villafáfi la, Rodrigo Ramírez,
& Paola Pezzini
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By Stefan Fassbinder / Published on Wed, 2007-12-12 13:21
Once upon a time there was a buyer at a large company who had to purchase a large three-phase induction motor with a power rating of 1 MW that was to be used in a big machine. As usual, he invited suppliers to submit bids. Before drafting the tender documents he spoke to the head engineer and technicians at the relevant technical department about the expected number of operating hours per year, the machine’s level of utilization and its load profile. Talks then began with potential suppliers about what sort of efficiencies could be achieved.
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By Hans De Keulenaer / Published on Wed, 2007-07-25 15:00
A number of economic case studies on the application of energy efficiency measures in an industrial environment:
- variable speed drive for water pump
- variable speed drive on combustion air fan
- energy savings in compressed air systems
- steam valve insulation
- condenser set point in cold storage room
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By Sergio Ferreira / Published on Wed, 2007-07-04 16:22
The objective of this case study is to analyse the effects of improving the efficiency of a 15kW induction motor in various countries with different energy mixes. The results show that an improvement of efficiency has higher environmental benefits in countries with an electricity generation based on fossil fuels rather than renewable energy sources or nuclear. Electricity mixes from EU25, France, Germany, Poland and Austria were used.
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