Minimum Energy Efficiency Motor Standards - what do they mean to you.pdf

8/14/2019 Minimum Energy Efficiency Motor Standards - what do they mean to you.pdf

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Confidential / Property of Danfoss Drives A/S

IEC 60034IEC 60034 -- Electric Motor StandardsElectric Motor Standards

Minimum Energy Performance StandardsMinimum Energy Performance Standards

what do they mean to you?what do they mean to you?

Helge Vandel JensenHelge Vandel Jensen


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| Confidential/Property of Danfoss Power Electronics A/S | Tuesday, 02 November 2010 | 2

Introduction

New standards have been developed by the

International Electrotechnical Commission(IEC) that will effect the sales of highefficiency motors across the globe.

Motor technology has advanced significantlyover the last few decades.

We will see more and more high-tech, high-end energy efficient motors ready tocontribute to lower greenhouse gases anddirect the market towards energy optimisedapplications.

IEC has worked together with NEMA, CEMEP,JEMA, IEEE and many other internationalorganizations to harmonize testing standards,efficiency classes and subsequent labelsnecessary to recognize high efficient productsin the market.


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Motor Energy Efficiency Today

Motors used worldwide today in industry can

be much more energy efficient.

For example, in European Industry, motorsconsume 70% of electricity.

Equal to 1,067,000,000,000 kWh annually.

Causing 427,000,000 tons of CO2 emissions.

New IEC standards will help enable apotential savings of 20 30% via the use offrequency converters.

Possible savings in 2020 for the EU alone:

135,000,000,000 kWh


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EU Directive 2005/32/EG

The EU directive 2005/32/EG Eco-Design

Requirements for Energy Using Products (EuP),approved by member states in March 2009, wasinstrumental in the development of the newInternational standards from the IEC.

The Directive outlined a group of products:Lot 11 - Electric motors (0.75-375 kW) as the

focus for new motor efficiency standards.

Lot 11: Electric motors (0.75-375 kW) definesMinimum Efficiency Performance Standards(MEPS) for motors in the range:

Nominal Voltage (UN) to 1000V Nominal Output Power (PN) 0.75 - 375 kW Either 2, 4 or 6 poles Continuous duty operation (S1) or intermittent

duty operation of greater than 80% (S3) Capable of operating directly on-line.


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Lot 11: Electric Motors (0.75-375 kW)

The Lot 11 criteria are based on the understanding that AC, three-phase induction motorsover 0.75kW constitute the large majority of motors sold worldwide.

Allocation of the saving potential by installed motors in the industrial sector.(Installed capacity multiplied by the average efficiency improvement)


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Harmonization of Standards

To enable recognition of high efficient products

in the market place, IEC has worked togetherwith NEMA, CEMEP, JEMA, IEEE and many otherorganizations to harmonize:

1. Testing Standards

2. Efficiency Classes

3. Labels


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International Standards and Regulatory Bodies.


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IEC Standards

There are two main standards developed by IEC that from 2009 dominate energy efficiencyclassification of motors worldwide.

IEC 60034-30:2008 IEC 60034-2-1:2007


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IEC 60034-30:2008

This standard defines global energy efficiency

classes for single-speed, three phase, 50Hz and60Hz, cage induction motors.

The defined IE classes are:

IE 1 = Standard Efficiency

IE 2 = High Efficiency

IE 3 = Premium Efficiency

IE 4* = Super Premium Efficiency

IE4 defines products that are not commercially

available yet and may not include AC inductionmotor design.


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IEC 60034-2-1:2007

This standard outlines methods for determining

losses and efficiency from tests with moreaccuracy than before.

For example the eff1, eff2 and eff3 classificationas defined by IEC 60034-2:1996 through anagreement between the EU and CEMEP,measured values that compared to the new

standard are:

~ 2-3% different for motors up to approx. 10 kW~ 1% different for motors up to approx. 100 kW

Note:

CEMEP = European Committee of Manufacturers ofElectrical Machines and Power Electronics.http://www.cemep.org

IEC 60034-2:1996 defined older methods used forover 100 years for determining motor efficiencyand will become obsolete in Nov. 2010.


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Future Nameplate Data

In future with the new standards, we will seemotor labels with data such as:

For example: IE3 94.5 %

Indicating the efficiency class and motorefficiency, tested according to IEC 60034-2-1at nominal load.

This will be printed by the manufacturer on themotor nameplate as shown in the example andis to be stated in the written productdocumentation and catalogues.

It will also be recommended to report theefficiencies at 50 % and 75 % nominal load inthe product documentation as these will berequired to calculate the energy demand whenthe motor is operated in part load.


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Efficiency Calculations

Efficiency can be easily measured bymeasuring electrical input power andmechanical output power and comparing thetwo.

In induction motors there are five mainsources for losses:

Stator and rotor winding losses

Mechanical losses due to friction andventilation.

Iron hysteresis and eddy currents

Parasitic currents in the stator and rotor ironlamination, housing, shaft and end shields.


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Efficiency Calculations

There is no straightforward way to measure alllosses.

Generally, total losses are most accuratelydefined by measuring all sources independentlyunder load and no-load conditions.

More than 20 different test facilities from

manufactures and independent laboratoriesfrom around the world have been used tooptimise the test procedures withinIEC 60034-2-1.

These tests will be revised over time.


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Comparison of eff to IE.

Calculation of efficiency of the IE classes is

according to IEC 60034-2-1:2007.

Permissible values of the IE classes wereadjusted according to the older eff classes.

Example: a 4-pole motor with 2,2 kW

eff1 (=86,4%) is comparable with IE2(=85,3%)

IE classes via the new standards have beenoffered from the beginning of 2009.

The older efficiency class eff will still bevalid, but will lose importance.

-IE4*

(Super Premium)

10-15% better

than IE 2

IE3

(Premium Efficiency)

Comparable eff1IE2

(High Efficiency)

Comparable eff2IE1

(Standard Efficiency)

eff classesIEC 60034-30

* IE4 defines products that are not

commercially available yet and may not

include AC induction motor design.


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MEPS according to EU directive 2005/32/EGMEPS =Minimum Efficiency Performance Standards, that are incorporated by the IEC standards.

IE3Or

IE2 + VSD0.75 375 kW

From

01.01.2017

IE3Or

IE2 + VSD

7.5 375 kWFrom

01.01.2015

IE20.75 375 kWFrom

16.06.2011

Note:

Branch organisations and private companies were able to influence thedevelopment of the EU Directive by proving that VSDs can greater increaseapplication efficiency than by improving motor technology alone.


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Implemented Minimum Efficiency Standard by Region.

Applied

Applied

IE1

AppliedAustralia

Planned from 2010/11AppliedUSA

>45 kW Applied

Minimum Energy Efficiency Motor Standards - what do they mean to you.pdf

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