Product Description:

The TBMS-12913-A is a frameless permanent-magnet motor kit manufactured by Kollmorgen within the TBM Frameless Motors series. The stator and rotor are delivered without housing or bearings, so the assembly is intended to be pressed directly into the end user's mechanical structure. This frameless format lets the surrounding machine provide the mechanical support for the active parts. Because no external frame is supplied, it can be integrated where radial space is limited and conventional housed motors would be too bulky. It allows compact joints and stages that still deliver servo-class torque for industrial automation tasks such as articulated robots, gimbals, and wafer-handling axes.

For continuous operation, the motor sustains a torque of 2.87 N-m while drawing 10.2 Arms from the drive, producing up to 505 W of mechanical power at its rated speed of 2490 RPM. A line-to-line resistance of 0.36 Ω and an inductance of 0.6 mH affect copper losses and current ripple at the servo amplifier. The windings support a 100 VDC bus voltage, which suits low-voltage mobile or collaborative platforms. Static friction is 0.127 N-m, and viscous damping is 0.0424 N-m/kRPM, both of which affect velocity-loop behavior during low-speed motion. With a mass of 1.32 kg, the stator can be mounted to lightweight carbon-fiber or aluminum frames without adding excessive weight. That continuous operating point is useful for axes that run at steady speed for long intervals.

When short-term overloads are required, the motor can develop a peak torque of 11 N-m by accepting up to 46.5 Arms. The electromagnetic design yields a back-EMF constant of 17.9 Vrms/kRPM, so the controller must accommodate proportional voltage rise during overspeed events. Rotor inertia is held to 0.000271 kg-m², permitting rapid acceleration with minimal energy storage, while the torque constant of 0.296 N-m/Arms links commanded current to output torque for feedforward control. Low inertia also helps fast indexing axes reverse direction with less stored energy in the rotating assembly. Peak output is intended for short overload periods rather than continuous thermal loading.