Product Description:

The TBM-6051-A is a frameless brushless servo motor core manufactured by Kollmorgen within the TBM Frameless Motors series. Supplied as separate rotor and stator assemblies, it is intended for direct integration into robotic joints, gimbals, or compact spindles where an external housing would add unnecessary bulk. In an industrial automation system, the unit provides torque directly to the load while allowing designers to keep overall inertia low and create slender mechanical envelopes.

At a nominal bus voltage of 48 VDC, the motor reaches a rated mechanical speed of 2065 RPM and can deliver 159 W continuously. Under stall conditions, it sustains 5.48 Arms while producing 1.08 N-m of holding torque, which marks the continuous operating point of a servo axis. The torque constant of 0.215 N-m/Arms links commanded phase current to produced torque, and the back-EMF constant of 13 Vrms/kRPM sets the voltage returned to the drive during deceleration. These relationships allow predictable current-loop tuning and keep the motor compatible with low-voltage motion controllers used on mobile or collaborative equipment.

For transient events such as acceleration or disturbance rejection, the winding can accept a peak of 24.5 Arms and generate up to 5.08 N-m of torque before saturation. Copper loss during those surges is associated with a phase resistance of 0.763 ohms, while current rise time is limited by an inductance of 0.6 mH. Mechanical dynamics are shaped by a rotor inertia of 0.0000475 kg-m², letting the axis change speed quickly without overshoot. Frictional effects are low, with 0.056 N-m of static breakaway torque and 0.0114 N-m/kRPM of viscous damping, so servo stiffness can be maintained with modest controller gain. The complete rotor-stator set weighs 0.571 kg, which helps keep articulated manipulators light and responsive.