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.