Product Description:

The TBM-12913-B is a frameless torque motor segment produced by Kollmorgen for integration into the TBM Frameless Motors series. By delivering direct-drive torque without a housing, the stator and rotor set fits tightly inside custom mechanical assemblies, allowing motion systems to eliminate gearboxes and belts in compact industrial axes. Within an automation cell, the unit acts as the prime mover for rotary positioning stages, dispensing heads, or gimbal joints where smooth, low-cogging motion and high concentricity are required.

When powered from a bus of 48 VDC, the motor develops a continuous shaft torque of 2.89 N-m while drawing a continuous stall current of 17 Arms. That steady-state output is linked to the copper characteristics. The phase-to-phase resistance is 0.129 ohms, and the inductance is 0.22 mH, which affect heat rise and current ripple under servo control. The electromagnetic conversion rate is set by a torque constant of 0.177 N-m/Arms, and twelve salient poles establish the magnetic wavelength for the drive algorithm. Under rated thermal conditions, the motor reaches a speed of 2505 RPM and delivers 505 W of direct mechanical power without external transmission losses.

The motor provides a peak stall torque of 7.36 N-m, making short acceleration bursts available for indexing or disturbance rejection. During velocity changes, the rotor’s back-EMF slope of 10.7 Vrms/kRPM informs the drive’s voltage headroom calculations, while the reflected inertia of only 0.000271 kg-m² lets closed-loop controllers command rapid reversals with minimal overshoot. Mechanical integration is aided by the lightweight steel lamination stack, as the active assembly weighs just 1.32 kg. Frictional losses remain low because static friction is 0.127 N-m and viscous damping is 0.0424 N-m/kRPM, so speed regulation stays tight across the full duty cycle.