Frame-less motors for ultimate space-saving

Nanotec has introduced a series of frame-less brush-less dc motors – essentially a stator-plus-rotor kit intended to be installed directly into a physical structure that will provide support, alignment and bearings.

“By eliminating the need for couplings or additional mounting components, these frame-less motors reduce material usage and assembly costs,” claimed the company. “The design also simplifies cable management and installation, making them easy to integrate into various applications.”

Called the DKA series, they offer outer diameters from 25 to 115mm, lengths from 11 to 62mm, up to 7.8Nm of torque, and up to 10,000rpm speed. Nominal powers span 78 to 733W.

Most of the range are nominally 48V motors, with only the smallest three intended to run from 24V. Continuous current ratings are 2 to 16.5A depending on motor size, with peaks roughly 3x higher.

Both the rotor and stator can be shrink-fitted or glue bonded, with shrink fitting limited by the maximum temperature of the motor part.

If the stator is shrunk-fit into a 6000-series aluminium assembly, for example, N8/h8 tolerances are recommended, altering to H8/js9 if adhesive bonding is selected.

Robotics and medical applications are foreseen.

Based near Munich since 2011, Nanotec was founded in 1991 and now has some 300 employees in Germany, Bulgaria, the USA and China.

The photos shows four rotor-stator pairs, two of them dismantled.