Product Description:

The TBMS-6025-B is a frameless brushless servo motor rotor-stator set manufactured by Kollmorgen for integration into compact machinery. It belongs to the TBM Frameless Motors series and is intended for direct embedding in joints, spindles, and gimbals where an external housing is supplied by the surrounding machine assembly. By supplying only the electromagnetic core, the unit reduces volume and inertia while still providing closed-loop torque generation for industrial automation axes that demand tight space constraints and high dynamic response.

For continuous operation, the motor is designed to run from a supply of 24 VDC. At that voltage it produces a rated mechanical output of 125 W while spinning at a rated speed of 2250 RPM. Under steady load the electromagnetic structure delivers a continuous stall torque of 0.694 N-m and draws a continuous stall current of 7.62 Arms. The 0.318 Ω phase-to-phase resistance and 0.2 mH inductance limit copper losses and help smooth current transitions, while the 5.75 Vrms/kRPM back-EMF constant establishes the required bus voltage for higher speeds. Twelve magnetic poles improve torque density without increasing outside diameter.

The motor can absorb short bursts of current for rapid acceleration. During transient events it tolerates a peak stall current of 27.7 Arms and can generate a peak stall torque of 2.56 N-m, providing margin for overcoming static friction or load spikes. A low rotor inertia of 0.0000252 kg-m² allows quick speed changes and precise position control, while the torque constant of 0.095 N-m/Arms links commanded phase current directly to output torque for straightforward drive tuning. The frameless kit is suitable for articulated robots, pan-tilt heads, and other motion stages that require high responsiveness with minimal added mass.