Product Description:

The TBMS-12913-B is a frameless torque motor kit developed by Kollmorgen for the TBM Frameless Motors series. It is supplied as separate stator and rotor components. The kit is integrated directly into the mechanical structure of gimbals, robotic joints, and compact rotary stages where space savings and direct-drive precision are required in industrial automation. This format lets the motor become part of the host assembly instead of using a separate housed motor.

The motor is designed for a continuous mechanical output of 505 W at a rated shaft speed of 2505 RPM while operating from a bus of 48 VDC. Under these conditions, it can hold a load with a continuous stall torque of 2.89 N-m, and momentary overloads are handled by its peak stall torque of 7.36 N-m. Twelve poles provide fine electrical resolution, and the 0.129 ohm phase resistance with 0.22 mH inductance sets the electrical time constant that the drive must accommodate. Static friction is limited to 0.127 N-m, so only a small torque command is needed to initiate motion, while a viscous damping coefficient of 0.0424 N-m/kRPM characterizes speed-dependent drag. These values, along with the rated power level, support amplifier selection and the thermal design of the host machine.

On the electrical side, the winding draws a continuous stall current of 17 Arms and can tolerate up to 46.5 Arms during brief acceleration events. The back EMF constant of 10.7 Vrms/kRPM indicates the voltage margin required for field-oriented control, and the torque constant of 0.177 N-m/Arms links commanded current to output torque in closed-loop operation. A rotor inertia of 0.000271 kg-m² supports fast velocity transients without compromising stability, complementing the low friction figures stated earlier. In compact direct-drive axes, these parameters support tight position control and responsive torque regulation.