As mentioned in the previous chapter, the introduction of mandatory and voluntary schemes to promote the penetration of energy efficient motor in the market has. In fact, in many industries they are the largest enduse of electricity, followed by nonprocess uses such as lighting and hvac, which also uses motors and electric process heat. Energyefficiency policy opportunities for electric motor. Understanding energy efficiency and productivity improvements the energy efficiency benefits of variablespeed drives vsds are well documented. The iec has put in place energy efficiency classes for electric motors. For an electric motor, efficiency is the ratio of mechanical power delivered by. For many years, the energy efficiency classes of electric motors lowvoltage threephase motors were defined only on the basis of a voluntary commitment by the manufacturers of the motors. Kitt butler, director, motors and drives, advanced energy john caroff, product manager, national electric manufacturers association nema frame motors, siemens energy and automation. Replace standardefficiency motors that are at the end of their useful life with premium efficiency motors. Efficiency improvements for ac electric motors page 3 of 3. This project is one in a series of sourcebooks on industrial systems. Electric motors drive both, core industrial processes, like presses or rolls, and. Energyefficient motor systems in the industrial and in the. Electric motor is a type of machine which converts electrical energy into mechanical energy using the interaction between magnetic field and current in its winding to producegenerate force in the motor.
With premium efficiency motors with adjustablespeed drives, significant electricity savings are possible. Custom incentives are based on actual energy savings, and options include everything from custom lighting to installing a cogeneration plant. Replace existing pneumatic or hydraulic motors with highefficiency electric motors. Advancing industrial sustainability through energy. Many motors are designed with a service factor that allows occasional overloading. Using drives to control motors can lead to big savings nearly 70 percent of all industrial electrical energy use goes to powering electric motors. Primer on energy efficiency for water and wastewater. Motors controlled by frequency converters are exempt from this regulation. For business customers looking for ways to manage energy use and reduce energy costs, oneforone rebates are now available for specific energy efficient lighting improvements. Abstractin this paper a look at energy efficiency in electric drives is taken strongly. Continuous energy improvement in motor driven systems.
Clamping is another area where hydraulics holds the advantage. United kingdom programmes 44 8 hugh falkner the danish high efficiency motor campaign 19961998 452 s0ren rise the dutch programme on efficient motors and drives 464 dick both part x motor databases. They have also shed light on a lack of capacities in terms of knowhow, financial resources and responsibilities in terms of managing electric energy in swiss industry. Whether youre installing new light fixtures, adding variable speed drives vsds to equipment motors or making process system enhancements, comed can help make your project more cost effective. Determining electric motor load and efficiency energy. Although induction motors can presently have ie4 efficiency class, when they are fed by frequency converters they present a significant decrease in their efficiency, even for constant torque applications. Uscar, representing fca us llc, ford motor company and general motors.
Better efficiency with hydraulics power electronics. The consortium for energy efficiency cee establishes efficiency tiers at levels that exceed federal minimum requirements for appliances and equipment. Overloaded motors can overheat and lose efficiency. Kitt butler, director, motors and drives, advanced energy. Technicaleconomic and costbenefit analysis of energyefficiency improvement in industrial. In industry, motors and drives powering mechanical equipment account for about 65 percent of the total electrical energy consumed.
Energy efficient motors better tolerate abnormal conditions such as impaired ventilation, under and overvoltage, and phase imbalance. Energy efficiency is also a key element of the european union eu energy policy, since it improves the efficiency of the economy, increases energy supply security, and decreases harmful emissions due to electricity generation. Energyefficiency policy opportunities for electric motordriven systems international energy agency paul waide and conrad u. Opportunities for energy savings in the residential and commercial sectors with highefficiency electric motors. The economics of energy savings in electric motordriven systems. From january 2015 onward, energy efficiency class ie3 premium efficiency will be the standard for motors with rated power of 7. The reduction of energy consumption through improvements in energy efficiency is one of the major instruments for developed and developing countries to meet the kyoto commitments. United states driving research and innovation for vehicle efficiency and energy sustainability. We began lowering the energy consumption of our motors in the 1920s, long before others were even talking about it. Ford motor company, general motors, and fca us llc us drive. Abb drives for water medium voltage drives for energy savings.
Energy efficient technologies in electrical system bureau of. Variablefrequency drive efficiency at full and partial load. Jan 26, 2016 however, with efficiency improvements for larger motors starting to level off, these smaller motors are now becoming the next target for new efficiency standards. Boosting industrial profitability with energy efficient drives and motors.
Download energy efficient motors seminar reports, ppt, pdf, energy efficient motors seminar topics, abstracts, full documentation, source code. Efficiency trends in electric machines and drives request pdf. Other publications in this series cover fan, compressed air, process heating, pumping, and steam systems. Or, if its time for a replacement, upgrade to a highefficiency. Even small improvements count over the system lifetime. Energyefficiency policy opportunities for electric motordriven. The globally increasing demand for energyefficient, operationally optimized drives gave rise to a range of different regulations for determining efficiency. Energy efficiency improvements in motors and drives. Energy efficiency is also a key element of the european union eu energy policy, since it improves the efficiency of the economy, increases energy supply security.
High efficiency electric motors title energy efficient electric motor selection handbook summary substantial reductions in energy and operational costs can be achieved through the use of energy efficient electric motors. Other options such as replacing gear reducers with more efficient models and completely redesigned systems for material handling maximize energy usage by shifting as much production work to times of less energy demand. Significant energy savings can be achieved through the use of variablespeed drives vsds. To effectively evaluate the benefits of high efficiency electric motors, we must define efficiency. Boosting industrial profitability with energy efficient.
If we actually reverse this process then mechanical energy is converted into electrical energy and that is done by generators. Improvements to the motors that drive almost every manufacturing and material handling operation does increase energy efficiency. However, with efficiency improvements for larger motors starting to level off, these smaller motors are now becoming the next target for new efficiency standards. The longer drives and motors are in operation, the higher the savings. The globally increasing demand for energy efficient, operationally optimized drives gave rise to a range of different regulations for determining efficiency. Definite benefits from energy efficiency for corporate users the following two examples clearly illustrate the benefits to users from energyefficient motors and variable speed drives. Reducing this figure is therefore of prime importance when it comes to energy savings. Opportunities for energy savings in the residential and commercial sectors with high efficiency electric motors, u. Our commercial rebates help you make energy efficiency improvements that can reduce operational costs by saving you money on your monthly bill. Electric motors and drives account for a substantial share of electricity use in the commercial and industrial sectors. The lessons learned include that energy efficiency improvements take considerably longer than anticipated, in part due to internal decision making procedures and budget cycles.
Pdf energy efficiency in electric drives researchgate. Motor and drive efficiency altra industrial motion. In the case of electric motors with a higher efficiency, the energy losses can be reduced significantly. Energy efficiency improvements in electric motors and drives. Powersines pioneered the market in the development of motor drives and soft starts for electric motors.
Pulleys sheaves of varying diameters allow the speed of the driven equipment. Service factor is a multiplier that indicates how much a motor can be overloaded under ideal ambient conditions. Understanding the efficiency of motors hpac engineering. The use of variable speed drives for flow and pressure control of electric motors results in significant energy savings and a reduction of lifecycle costs. Drives adjust the speed of electric motors to match the actual demand of the application thereby reducing. Over the total running time, more than 97 percent of the. Many refrigerators and freezers, variable air volume vav boxes, air handlers, and other equipment come equipped with fans powered by lowefficiency shaded pole sp or. The potential energy savings from electrical drive systems are approximately 40 per cent. Motors are huge consumers of electricity, even small improvements can lead to large energy savings.
A handbook was compiled to help industry identify opportunities for costeffective application of these motors. Save energy and money by taking steps to boost the efficiency of your hvac and refrigeration systems. These motors are the workhorses of business, from pumps moving fluids to fans moving air to compressors, conveyors, and every type of machine that depends on rotational force to. Some machines have gone to linear motors to improve responsiveness but they, too, sacrifice efficiency, as linear motors can be much less efficient than rotary motors with gearing. Austin energy offers rebates to commercial customers who install new equipment or retrofit existing equipment with highefficiency electronically commutated motors ecms. In general, efficiency tiers designate products or services that achieve superior energy efficiency without tradeoffs in performance or quality and that offer 3. Electric motor systems use over half of all electricity consumed in developed countries. Design improvements and more accurate manufacturing tolerances are keys to the improved efficiencies with these motors. Motor efficiency improvements for pumping applications. Energy efficiency improvements in electronic motors and.
Energy efficiency with electric drive systems zvei. Minimum efficiency standards for electric motors will soon. Advancing industrial sustainability through energy efficiency. Motion efficiency is bolstered with newer technologies. The updated electric motor standards apply the standards currently in place to a wider scope of electric motors, generating significant estimated energy savings. Motor efficiency, selection, and management xcel energy. These are to be found mainly in the industrial and commercial sector 4. Qualifying custom projects are also eligible such as motors variablefrequency drives vfd and assembly line improvements.
Replace vbelts with notched or synchronous belt drives approximately onethird of the electric motors in the industrial and commercial sectors use belt drives. Department of energys doe industrial technologies program itp. Pumping systems are a major opportunity for energy efficiency improvements in waterwastewater industry 0 500 1,000 1,500 2,000 p p p p p p p p rewind savings downsize savings fan savings other savings air compressor savings motor upgrades pump savings source. Download energy efficient motors seminar reports, abstract. If we actually reverse this process then mechanical energy is converted into electrical energy and that. Department of energy doe, electricmotordriven equipment uses 25 percent of all of the electricity consumed in the united states. Rebuild worn motors to an efficiency similar to original specifications to boost efficiency and throughput. They convert electrical energy to mechanical energy, rotate pumps, drive compressors, move materials and run fans, blowers, drills or mixers. The idaho power commercial and industrial energy efficiency program cip provides a comprehensive menu of incentives and services to facilitate the implementation of costeffective energyefficiency improvements for commercial and industrial customers. Continuous energy improvement in motor driven systems and its companion publication. Request pdf energy efficiency improvements in electronic motors and drives the 1997 kyoto conference defined co2 emission targets for the developed regions of the world. Studies show a high potential for energy efficiency improvement in motor. Department of energys does advanced manufacturing office amo with support from the copper development association cda.
Energy efficient motors use less electricity, run cooler, and often last longer than nema national electrical manufacturers association b motors of the same size. Brunner working paper 2011 the views expressed in this working paper are those of the. When it comes to developing new motor technologies, copper continues to be integral to constant improvements in motor efficiency. The standard induction motor achieved significant gains in efficiency through more copper in the windings, a highergrade steel core, improved bearings and insulation, and improved cooling fan design.
We provide rebates on these energy efficiency improvements and more. Beginning in mid2016, an updated standard established this year by the u. Priority for an electric motor energy efficiency programme. Energy efficiency policy opportunities for electric motordriven systems international energy agency paul waide and conrad u. Consortium for energy efficiency 98 north washington street, suite 101 boston, ma 02114 xcel energy is a sponsor of motor decisions matter sm mdm, a public awareness campaign managed by the consortium for energy efficiency. Motors, drives, and hvac efficiency specifying engineer. Doe, december 1999 total motor population residential, commercial and industrial sectors. Technical economic and costbenefit analysis of energyefficiency improvement in industrial. Idaho power commercial and industrial energy efficiency. The reduction of energy consumption through improvements in energy efficiency has become an important goal for. For most countries the saving potentials for energy efficiency improvements in motor systems with best available technology lie between 9 and. Measuring the economic impact of efficiency improvements.
Replace vbelts with notched or synchronous belt drives. The reduction of energy consumption through improvements in energy efficiency has become an important goal for all countries, in order to improve the efficiency of the economy, to increase energy supply security, and to reduce the emissions of co and other pollutants caused by power generation. Industrial motors systems, market opportunities assessment, u. Department of energy doe for electric motors will once again increase the minimum efficiency of new motors. In addition, variable speed drives provide soft startingstopping features, which improve system reliability and extend the lifetime of motors. Department of energy doe, electric motordriven equipment uses 25 percent of all of the electricity consumed in the united states. Increasing energy efficiency in your building saves your business money. Energy efficiency improvements in electric motors and. Advancing industrial sustainability through energy efficiency improvements in motors and motor driven systems baskar vairamohan. Improving motor and drive system performance energy. Neubauer, konrad reichert, jurg nipkow energy efficiency improvements in motors and drives. With premiumefficiency motors with adjustablespeed drives, significant electricity savings are possible.
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