Now single-phase motors must comply with efficiency requirements

Now single-phase motors must comply with efficiency requirements

By: Brian Bannister of Lafert Electric Motors Ltd

A new dawn for single-phase motors is coming. Whilst three phase motors have been required to meet increasingly greater levels of efficiency, single-phase motors have escaped similar demands. That will change on July 1st, 2023.

From July 1st this year, most single-phase motors will be required to meet or exceed efficiency levels of IE2, to comply with EU EcoDesign regulation EU2019/1781. This new efficiency will be demanded for single-phase motors with rated outputs from 0.12kW upwards.

Variable speed drives intended for use with single-phase motors will also be required to meet new efficiency standards compatible with the new motor requirements.

The new Regulation establishes ‘EcoDesign’ requirements for the placing on the market or the putting into service of singlephase electric motors and variable speed drives, including where they are integrated in other products.

Achieving the new levels of efficiency required to meet IE2 will come at a cost, due to the need for much more active material, low-loss steel laminations and copper. The consequence of these factors could lead to possible changes to either frame size or performance, or maybe even both.

Producing dual voltage (230/115v) motors might not be possible whilst dual frequency motors (50/60Hz) will present their own issues. Also, 60Hz motors will be challenging and more costly to produce because of the winding losses incurred at higher running speeds.

As a market leader in single-phase technology with over 60 years’ experience in design and manufacture, Lafert Electric Motors are amongst the best people to contact for guidance. This is especially the case because many motor manufacturers have decided that the new legislation is far too complex and demanding and, consequently, have dropped single phase motors from their own ranges. In contrast, Lafert Electric Motors have even expanded the powers that can be offered as the required design changes have been made. Furthermore, due to the company’s flexible designs, it can offer many variations of customised shafts and flanges along with very specific electrical designs.

Due to current production lead times across all industries, however, it is vitally important that any OEM or customer using single phase motors should ensure they either meet compliance or will have assured continuation of supply from their current supplier after the summer of 2023. The concern is that many machine builders are still in the dark regarding this important mandatory legislation and this might have significant impact upon their production planning.

There are some single-phase motors to which these new efficiency requirements will not apply. Typically, such motors are designed to operate under specific conditions or configured to perform a particular function. Exempt motors might be employed in difficult environments and/or used for applications that actually make it impossible for the new efficiencies to be implemented. For guidance regarding these exceptions, and the new regulatory requirements, it advisable to consult with one of the company’s Motor Specialists. ■

For more information, Phone: +44 (0) 1270 270022

Email: luk.info@shi-g.com