Product Description:

The TBMS-12941-B is a frameless motor kit produced by Kollmorgen within the TBM Frameless Motors series. Intended to be integrated directly into a mechanical structure, it provides torque for compact, weight-sensitive axes in industrial automation equipment such as gimbals, robotic joints, or semiconductor handling stages. By supplying torque without an external housing, the kit allows designers to minimize the total envelope and align the electromagnetic package precisely with the driven load.

The motor develops a continuous stall torque of 7.66 N·m at a rated speed of 580 RPM, delivering steady rotary force for duty cycles that require uninterrupted positioning or low-speed rotation. During normal operation, it draws 14.9 Arms, and the winding copper generates heat as the motor delivers the declared 830 W mechanical output. A torque constant of 0.535 N·m/Arms links commanded phase current to produced torque, while the back-EMF constant of 32.3 Vrms/kRPM indicates the voltage induced per unit speed and helps determine suitable drive headroom. Internally, the phase resistance is 0.215 Ω and the inductance is 0.68 mH, and these electrical values influence current ripple and the motor’s electrical time constant. The windings are designed for a 48 VDC bus, and static friction of 0.346 N·m must be overcome before motion begins.

For short bursts, the motor withstands a peak stall torque of 24.4 N·m by drawing up to 46.5 Arms, enabling rapid acceleration or disturbance rejection when limited to brief intervals. Dynamic response benefits from a rotor inertia of 0.000721 kg·m², allowing quick velocity changes with moderate controller effort, while the overall assembly mass of 3.17 kg helps meet payload constraints. The magnetic circuit supports speeds up to 1040 RPM before voltage or mechanical limits are reached, giving additional headroom for short overspeed positioning maneuvers.