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Permanent-magnet motor exceeds IE4 requirements

29 April 2014

WEG has now launched a permanent-magnet motor that is said to fulfil demanding IE5 requirements – having around 20% lower losses than IE4 motors. It is said to be one of the first to qualify for the IE5 Ultra Premium Motor designation. 

WEG introduced the W22 Super Premium IE4 three-phase induction motors in late 2012, WEG is further consolidating its leadership with even more efficient permanent-magnet synchronous motors. 

The W22 permanent-magnet motor combines high efficiency with compact size. The latest member of the W22 Super Premium motor range is among the first Ultra Premium motor on the market to fulfil the present criteria for the potential IE5 energy efficiency class. Motor performance has also been optimised to achieve lower noise and vibration emissions. 

The new permanent-magnet motors in the W22 series are AC synchronous motors driven by CFW11 frequency inverters. The CFW11 frequency inverters have specific software for open-loop speed control of permanent-magnet motors. The software is based on a special drive strategy designed to maximise the torque per ampere. This approach makes the combination of a W22 permanent-magnet motor and a CFW11 frequency inverter a very efficient drive system that is able to deliver constant torque over the entire operating range.


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