Complete series of brushless motor controllers

During the SPS, IPC, Drives in Nuremberg last year, KAG Kählig Antriebstechnik GmbH already introduced the ECM 42 and ECM 63 (ECM = Electronic Commutated Motor) brushless drives with diameters of 42 and
63 mm.
At the Hanover Fair, the specialist on special drive solutions from Hanover will be presenting further ECM sizes and thus a complete series of brushless drives with different diameters and different output ranges. The gap between the ECM 42 with an output ranging from 8 to 32 W and the ECM 63 in the output range 45 to 95 W (in each case at approx. 3,000 rpm) will now be filled by the ECM 48 (48 mm diameter) with an output of 19 to 50 W.
The ECM 63 is also being provided with a bigger brother with a diameter of
75 mm (ECM 75), whose output range will extend from 65 to 154 W, also at approx. 3,000 rpm.

Extremely adaptable
The new developments ensure high performance thanks to their maximum speed of 8,000 rpm (ECM 63 and ECM 75) and 10,000 rpm (ECM 42 and ECM 48). As the motor coils of the brushless drives are connected triangularly, with the same voltage the number of turns per unit length of coil can be increased and simultaneously the diameter of the winding wire reduced. Dr. Hans-Jürgen Remus, Technical Director of KAG comments: “With simple commutation electronics, using this concept the motors can be adapted more effectively to the speed required for a specific drive task. For us, as suppliers of high-quality special drive solutions, among other things, this was an important argument.”

Smooth running, high power density
In addition, the rotors of the ECM have a quadripolar design - with professional resin bonded NeFeB magnets (neodymium iron boron). The result: The motors convince through their smooth running and, in comparison with bipolar drives, simultaneously have a higher power density.

Up to 20,000 hours in continuous operation
“Our ECMs distinguish themselves, in particular, through their long service life, up to 20,000 hours in continuous operation, as well as excellent dynamic features and extremely smooth running” emphasizes Dr. Remus and describes out the advantages of these special features in detail: “The brushless motors manufacturers are therefore particularly suitable for applications in which the drives are subject to low wear with simultaneously minimal mass moment of inertia and very quiet running is demanded. This is required, for example, in positioning drives with extremely short response times, pumps for continuous operation, ventilators with very smooth running or low-maintenance door-opening systems.”

Compact and lightweight construction
The engineers at KAG have also considered weight reduction and space-saving installation in the development of the brushless drives. Both the end shields and housings are manufactured in aluminium. For compact integration, depending on the packet length, the overall lengths of the ECMs vary between 70 and 100 mm (ECM 42), 80 and 120 mm (ECM 48), 90 and 130.5 mm (ECM 63) or 101.5 and 141.5 mm (ECM 75).

The possible, simultaneous shaft loads of the ECM 42 and ECM 48 amount to 40 N axial and 100 N radial. The larger drives ECM 63 and ECM 75 facilitate a simultaneous axial shaft load of 110 N and radial shaft load of 300 N.

User-specifically configurable
All drives of the ECM series can be configured specific to the application. The many years of experiences of KAG’s engineers, an extensive package of accessories (gearboxes, brakes, professional encoders) as well as considerable investments in new machines, equipment and an own research laboratory, are the guarantee for a successful cooperation.