Product Description:

The TBM-12913-A is a frameless permanent-magnet motor core supplied by Kollmorgen within the TBM Frameless Motors series. This kit-style unit is intended to be built directly into a host machine's mechanical structure, providing torque for precision rotary axes without adding excess envelope or bearing drag. In industrial automation, it serves as the primary mover for compact direct-drive stages, enabling high-bandwidth motion while keeping inertia low. Because it is a frameless motor core rather than a housed motor, the surrounding machine must provide bearing support, alignment, and a thermal path for the stator. That arrangement is useful in compact assemblies where couplings or gearboxes would add compliance and reduce positioning accuracy.

The motor is designed for a bus of 100 VDC and delivers a continuous mechanical output of 505 W at its rated speed of 2490 rpm. To sustain that output, the windings draw 10.2 Arms and can hold a continuous stall torque of 2.87 N-m without exceeding thermal limits. Electrical behavior is influenced by a DC resistance of 0.36 ohms and an inductance of 0.6 mH, which affect current rise and ripple at the drive output. A torque constant of 0.296 N-m/Arms links phase current to developed torque, while static friction of 0.127 N-m and viscous damping of 0.0424 N-m/kRPM describe low-speed drag and speed-related mechanical loss. The 1.32 kg rotor-stator assembly keeps moving mass low for direct-drive applications that require short settling times.

For transient moves, the windings can accept a peak of 46.5 Arms, producing up to 11 N-m of stall torque for short intervals. The back-electromotive-force coefficient of 17.9 Vrms/kRPM indicates the voltage generated as speed rises, so the drive must match its available bus voltage to the commanded operating range. Mechanical responsiveness is further supported by a rotor inertia of 0.000271 kg-m², which limits stored kinetic energy during acceleration and reversal. Lower inertia helps the axis respond quickly to changes in command, especially in direct-drive tables and indexing mechanisms. This combination supports rapid starts and accurate positioning without external gear reduction.