New Frameless DC Motor for Robotic Drives

By Phoebe Grinter / 29 Nov 2021

maxon has introduced a new frameless brushless DC motor with matching encoder for dynamic applications. maxon is also presenting a new series of ECX flat motors for a wide range of robotics applications. 

Frameless DC Motor for Robotic Drives
Left: EC Frameless DT50.
Right: Brushless DC Motors ECX 22/32/42 flat.

Innovative DC motor concepts meet growing market requirements for dynamic response, compactness, and power density. The DT50 is the precursor of a new product family developed specifically for dynamic movements. The brushless DC motor with its frameless concept can be easily integrated into a wide range of applications by design engineers. It is designed for applications where speeds can change in an instant, in collaborative robots or exoskeletons, for example. When installed, the EC frameless DT50 effortlessly reaches a nominal torque of over 500 mNm at a nominal speed of 4,000 rpm. This is despite a stator outside diameter of only 50 mm. At the same time, the new winding technology enables a very short motor length with a very large hollow shaft of 28 mm. 

The TSX-MAG encoder completes the EC frameless DT50. It is a new through-shaft encoder that is not installed directly on the motor axis (off-axis installation). This gives engineers freedom when it comes to design. The encoder can generate both Hall signals and incremental signals, which allows field-oriented commutation of the motor. 

maxon presents another innovation in the area of brushless DC motors with its ECX flat or pancake DC motor product family. These external-rotor motors can be configured online and are optimized for maximum performance thanks to the special winding technology as well as segmented magnets. The ratio of torque to weight and size is ideal for Unmanned Aerial Vehicle (UAV) and robotics applications. 

The iron-wound motors will be available with diameters of 22 mm, 32 mm, and 42 mm, each in a short version and a long version. The short versions are just 14 mm, 16 mm or 21 mm in length. The brushless DC motors are tailored to compact drive solutions, which need a high torque. In addition, all variants will also be available with integrated encoders or with integrated speed controllers as a complete drive system. 

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Posted by Phoebe Grinter Unmanned Systems Technology’s digital editor and copywriter Phoebe takes a fresh and enthusiastic approach to researching, writing and posting the latest unmanned technology updates, and in managing the UST social channels. Connect & Contact