Unlike conventional synchronous motors, the SuPremE motor does not contain any magnetic materials, such as rare earths, which cannot be mined without considerable environmental impact in the countries of origin. Since the new drives no longer need failure-prone rotor position sensors, they are as robust and reliable as speed-controlled asynchronous motors. Low temperatures are possible within the rotor, making the life of the new motors’ bearings is longer. The SuPremE is equipped with a four-pole rotor that consists of a laminated core without a cage. The rotor laminations are shaped to guide the lines of flux. Combined with the PumpDrive variable speed system, speeds ranging between 0 and 4,200 revolutions per minute are possible as a standard. The new synchronous reluctance motors can also meet future requirements of energy-efficient pump drives. They have at least 15% less power dissipation than that prescribed by Regulation EC 640/2009 for efficiency class IE3 from 2015 or 2017, depending on the motor rating. This means that the motors reach efficiency level IE4 as per IEC/CD 60034-30 Ed. 2 already today. KSB plans to supply the motors to other manufacturers of rotating equipment.The motor was first presented as a prototype at the Hanover trade fair in 2009.
