From robotics and prosthetics to medical and laboratory technology and pump applications - Faulhaber is increasingly confronted with demands from users: More power in the smallest space! According to Andreas Seegen, Head of Marketing at the drive technology specialist from Schönaich, the design of the motor winding and its production are essential for very compact, yet extremely high-torque motors: "This is where we started and developed a new series based on classic external rotor motors."

The powerful "heart" of the so-called BXT series is the electromagnetic design of the stator and rotor. With 14 strong NdFeB individual magnets on the rotor and 12 teeth on the stator, Faulhaber has combined proven technologies with innovative winding technology, according to Seegen. This means that the copper fill factor in the active part of the winding is extraordinarily high, while at the same time space consumption has been reduced to a minimum by laying the wires.

As a result, the brushless DC servo motors deliver torques of up to 134 mNm with diameters of 22 mm, 32 mm or 42 mm and a continuous output of up to 100 watts. "This means that the compact motors significantly exceed the usual output values in this drive class," says Seegen. Above all, the ratio of torque to installation space and weight is significantly better than the market standard.

When asked about specific applications for the new motors, Seegen replies: "In the case of a forearm prosthesis, for example, the small motor for the hand and the medium-sized motor for the elbow are ideal. There are also potential applications for robot grippers, in industrial automation, in humanoid robots and even in biorobotics. And dialysis machines and medical pumps, for example, can also benefit from the good synchronization properties."

The series is equipped with digital Hall sensors as standard and is designed for speeds of up to 10,000 rpm. The motors can be combined with various gearboxes, encoders, brakes and control units from the Faulhaber range. If required, they can also be individually adapted to the application by modifying the mechanical and electrical interfaces. As with other Faulhaber motor families, users can choose between motors with or without housing. Seegen comments: "The unhoused BXT R versions are particularly recommended for speed-controlled applications in which high outputs are implemented, as the heat is optimally dissipated here. However, it must be ensured that the rotor can rotate freely in the application. The housed BXT H versions, on the other hand, are particularly suitable for positioning applications, as they can be combined with a variety of optical and magnetic encoders."