EC micro drives features brushless and brush DC motors with diameters of between 6-10 mm. DC motors with ironless winding are characterized by the absence of magnetic detent, rapid acceleration thanks to a low moment of inertia, low electromagnetic interference, low inductance, and high efficiency. This group includes the RE 8 with an external diameter of 8 mm and 0.5 W assigned power rating and the RE 6 at 0.3 W. Both have high-tech ceramic shafts. At 0.8 mm in diameter, their motor shafts are as thin as a pencil lead. The central feature of the cylindrical, brushless motor is the electronic rather than mechanical commutation. This means that the bearings are practically the only restricting factor in terms of service life. The motor rotation is free of any detent and reaches high speeds, even at low voltages.
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