TECHNOLOGY n ABB CLAIMS TO BE the rst motor manufacturer to have achieved IE6 levels of e ciency from a synchronous reluctance motor (SynRM) motor without needing to use magnets. The Brazilian motor-maker WEG recently announced that it had achieved a similar level of e ciency from a SynRM motor, but its W23 Sync+ Ultra motors incorporate ferrite (not rare-earth) permanent magnets in frame sizes up to 280. ABB says that its new machines cut energy losses by 20% compared to IE5 motors. They use the latest iteration of the SynRM technology that it pioneered in 2011. The company says that early adopters of the IE6 “hyper-e ciency” motors will bene t from lower energy costs and increased productivity, while moving ahead of current sustainability targets. “Using our new magnet-free SynRM motors reaching e ciency levels expected for future IE6 will also take energy savings to the next level,” says Stefan Floeck, president of ABB Motion’s IEC lowvoltage motors division. “Because the IE6 SynRM is the same size as the equivalent IE3 induction motor it is an easy and straightforward replacement for legacy motors. That makes it possible for customers to upgrade to modern, high-e ciency products to future-proof their operations in a world of uctuating energy costs.” Although IE6 has not yet been de ned in any o cial standard, each higher IE e ciency class has cut losses by 20% compared to the previous one. ABB has assumed that this will continue to be the case with its IE6 SynRM machine. SynRM technology is said to combine the performance of PM motors with the simplicity and service-friendliness of induction motors, to achieve high e ciencies with short payback times. The rotors have neither magnets nor windings, and almost no power losses. The design needs no rare-earth metals and can be used with suitable VSDs (variable-speed drives) to provide speed control. In addition to the magnet-free SynRM machines, ABB can also achieve expected levels for future IE6 e ciency using a hybrid technology (called PMaSynRM ) that combines SynRM with a permanent magnet “boost”. ABB is ‘first’ to achieve IE6 motor efficiency without needing magnets ABB says its latest synchronous reluctance motors can achieve IE6 e ciencies without needing permanent magnets
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