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It is highlighted that the electricity sector presents a challenge and an opportunity in the battle against climate change, as it is the fastest growing source of GHG emissions. For this purpose, efficiency improvement is crucial to a sustainable energy future, as it could deliver more than half of the required energy reductions. Electric motors classification based on minimum energy performance standard...
The declining resources combined with environmental global warming concerns and increasing energy prices make energy efficiency a crucial objective. Furthermore, improving energy efficiency is often the cheapest, fastest and most environmentally friendly way to meet the world's energy needs.
The paper presents an experimental comparison of the efficiency performances of 3 hp Premium efficiency induction motors issued from three different main manufacturers. In general, the obtained experimental results concord sensibly well with the rated nameplate data. In the rated regime, the three motors show faithfully the same efficiency, but a certain 1 to 2.5 % discrepancy appears with load and...
The present paper deals with a variable-speed low-cost wind power generator. The proposed generating apparatus consists of a squirrel-cage self-excited induction generator, a controlled AC/DC converter, and a closed-loop control system. The dynamic flux model of the self-excited induction generator used in the wind power-generator is presented. This model, which accounts for magnetic saturation, is...
The paper presents an experimental comparison of the efficiency and losses characteristics of 3 hp Premium efficiency and EFF1 induction motors. North American and European motors were tested according to Standard IEEE 112-B. A comparison, at rated operating point, shows that, under the same load conditions, the Premium motor operates with 2 % higher efficiency than EFF1 motor. However, in low voltage...
The air-gap interface coupling method is developed to simulate the rotor movement with time-stepping finite element (TSFE) method for the computation of transient operation of induction motors. The use of Fourier decomposition of magnetic vector potential on the coupling interface leads to the consideration of only the first or just significant space harmonics in FE computation. In this way, the study...
This paper illustrates the induced enormous energy saving potential, permitted by using adjustable speed drives and high-efficiency motors. Furthermore, the most important barriers to larger high-efficiency motors & adjustable speed drives utilization are identified, and some incentives recommendations are given to overcome identified impediments. The authors consider that there is a strong case...
This paper illustrates the advantages of adjustable speed drives versus mechanical method. The enormous energy savings potential is experimentally illustrated. Moreover, the most important barriers to larger adjustable speed drives utilization in turbo-machine industry (pumps, fans...) are identified. In addition some recommendations are given to overcome identified obstacles.
In this paper a method of detection of broken bars in squirrel cage induction machine is presented. This method is based on the determination of discrete parameters of the transfer functions of the induction machine by model structures such as ARMAX, ARX, IV and OE model structures
The paper describes the energy production and the plan to reduce GHG emissions. It begins by reviewing energy production and carbon dioxide emissions, with particular emphasis to each source dilemma. Next, last Canadian plan on how to achieve Canada's commitment under the Kyoto protocol to reduce its greenhouse gas emissions to 6% below 1990 levels during the commitment period 2008-2012 is described,...
The paper describes the Canada's Kyoto GHG emissions gap analysis. It begins by reviewing carbon emission sources inventory, and Kyoto's gap. In the year 2003, Canada's GHG emissions were 24 % above 1990 reference level, and the gap between Canada's Kyoto commitment and total inventoried emissions is becoming more and more alarmingly large. In addition, the increases were exacerbated by particular...
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