AEMT - Association of Electrical and Mechanical Trades

Electric Motor and Drives Energy Efficiencies - 2021 Eco Design Directive

Eco Design Regulations for Electric Motors

Updated in July 2021

To download a print friendly A5 document containing these guidlines, please click on the following link:

The following are the Eco Design Directive Details:

Commission Regulation EU 2019/1781, amendment (EU) 2021/341 sets new requirements for electric motors and variable speed drives:

This Regulation applies to the following products:

  • induction electric motors without brushes, commutators, slip rings or electrical connections to the rotor, rated for operation on a 50 Hz, 60 Hz or 50/60 Hz sinusoidal voltage, that:
    • have two, four, six or eight poles;
    • have a rated voltage U N above 50 V and up to and including 1 000 V;
    • have a rated power output P N from 0,12 kW up to and including 1 000 kW;
    • are rated on the basis of continuous duty operation; and
    • are rated for direct on-line operation;
  • variable speed drives with 3 phases input that:
    • are rated for operating with one motor refered to in point (a), within the 0,12 kW-1 000 kW motor rated output range;
    • have a rated voltage above 100 V and up to and including 1 000 V AC;
    • have only one AC voltage output. 

The requirements in section 1, and points (1), (2), (5) to (11), and (13) of section 2 of Annex I shall not apply to the following motors:

  • motors completely integrated into a product (for example into a gear, pump, fan or compressor) and whose energy performance cannot be tested independently from the product, even with the provision of a temporary end-shield and drive-end bearing; the motor must share common components (apart from connectors such as bolts) with the driven unit (for example, a shaft or housing) and shall not be designed in such a way that the motor can be separated in its entirety from the driven unit and operate independently. The process of separation shall have the consequence of rendering the motor inoperative;
  • motors with an integrated variable speed drive (compact drives) whose energy performance cannot be tested independently from the variable speed drive;
  • motors with an integrated brake which forms an integral part of the inner motor construction and can neither be removed nor powered by a separate power source during the testing of the motor efficiency;
  • motors specifically designed and specified to operate exclusively:
    • at altitudes exceeding 4 000 metres above sea-level;
    • where ambient air temperatures exceed 60 °C;
    • in maximum operating temperature above 400 °C;
    • where ambient air temperatures are less than – 30 °C; or
    • where the water coolant temperature at the inlet to a product is below 0 °C or above 32 °C;
  • motors specifically designed and specified to operate wholly immersed in a liquid;
  • motors specifically qualified for the safety of nuclear installations, as defined in Article 3 of Council Directive 2009/71/Euratom (8);
  • explosion-protected motors specifically designed and certified for mining, as defined in Annex I, point 1 of Directive 2014/34/EU of the European Parliament and of the Council (9);
  • motors in cordless or battery-operated equipment;
  • motors in hand-held equipment whose weight is supported by hand during operation;
  • motors in hand-guided mobile equipment moved while in operation;
  • motors with mechanical commutators;
  • Totally Enclosed Non-Ventilated (TENV) motors;
  • motors placed on the market before 1 July 2029 as substitutes for identical motors integrated in products placed on the market before 1 July 2022, and specifically marketed as such;
  • multi-speed motors, i.e. motors with multiple windings or with a switchable winding, providing a different number of poles and speeds;
  • motors designed specifically for the traction of electric vehicles.

The requirements in section 3, and points (1), (2), and (5) to (10) of section 4 of Annex I shall not apply to the following VSDs:

  • VSDs integrated into a product and whose energy performance cannot be tested independently from the product, that is to say that an attempt to do so would render the VSD or the product inoperative;
  • VSDs qualified specifically for the safety of nuclear installations, as defined Article 3 of Directive 2009/71/Euratom;
  • regenerative drives;
  • drives with sinusoidal input current.

Rewinds:

A good repair or rewind by an AEMT member using the latest specification winding wire and insulation systems and good quality bearings will maintain, and often improve, the efficiency of a motor within its original rated efficiency level band  (see the AEMT EASA Good Practice Guide): www.theaemt.com/technical 

Tolerances for Efficiency Levels

To comply with the regulation on nominal motor efficiency (η), the losses (1-η) should not vary by more than 15 % on power range 0.75-150 kW and 10 % on power range > 150-375 kW.

PN

kW

2 Pole4 Pole6 Pole8 Pole
IE2IE3IE4IE2IE3IE4IE2IE3IE4IE2IE3IE4
0.1253.660.866.559.164.869.859.157.764.939.850.762.3
0.1860.465.970.864.769.974.764.763.970.145.958.767.2
0.2061.967.271.965.971.175.865.965.471.447.460.668.4
0.2564.869.774.368.573.577.968.568.674.150.664.170.8
0.3769.573.879.172.777.381.172.773.578.056.169.374.3
0.4070.474.678.973.578.081.773.574.478.757.270.174.9
0.5574.177.881.577.180.883.977.177.280.961.773.077.0
0.7577.480.783.579.682.585.779.678.982.766.275.078.4
1.1079.682.785.281.484.187.281.481.084.570.877.780.8
1.5081.384.286.582.885.388.282.882.585.974.179.782.6
2.2083.285.988.084.386.789.584.384.387.477.681.984.5
3.0084.687.189.185.587.790.485.585.688.680.083.585.9
4.0085.888.190.086.688.691.186.686.889.581.984.887.1
5.5087.089.290.987.789.691.987.788.090.583.886.288.3
7.5088.190.191.788.790.492.688.789.191.385.387.389.3
11.0089.491.292.689.891.493.389.890.392.386.988.690.4
15.0090.391.993.390.692.193.990.691.292.988.089.691.2
18.5090.992.493.791.292.694.291.291.793.488.690.191.7
22.0091.392.794.091.693.094.591.692.293.789.190.692.1
30.0092.093.394.592.393.694.992.392.994.289.891.392.7
37.0092.593.794.892.793.995.092.793.394.590.391.893.1
45.0092.994.095.093.194.295.493.193.794.890.792.293.4
55.0093.294.395.393.594.695.793.594.195.191.092.593.7
75.0093.894.795.694.095.096.094.094.695.491.693.194.2
90.0094.195.095.894.295.296.194.294.995.691.993.494.4
110.0094.395.296.094.595.496.394.595.195.892.393.794.7
132.0094.695.496.294.795.696.494.795.496.092.694.094.9
160.0094.895.696.394.995.896.694.995.696.293.094.395.1
200.0095.095.896.595.196.096.795.195.896.393.594.695.4
250.0095.095.896.595.196.096.795.195.896.593.594.695.4
315.0095.095.896.595.196.096.795.195.896.693.594.695.4
355.0095.095.896.595.196.096.795.195.896.693.594.695.4
400.0095.095.896.595.196.096.795.195.896.693.594.695.4
450.0095.095.896.595.196.096.795.195.896.693.594.695.4
500 to
1000
95.095.896.595.196.096.795.195.896.693.594.695.4