Product Description:

The MTC726B1-R1D1 is a brushless AC servo motor produced by Kollmorgen as part of the MTC Servo Motors series. It is intended for demanding positioning, velocity, and tension-control axes in packaging machines, gantry stages, or converting lines. By transforming controlled stator current into precise shaft torque, the unit lets a digital drive move sizable loads quickly and stop them exactly where required. Its brushless construction also supports smooth commutation and repeatable response during frequent starts, stops, and reversals.

The motor supplies a continuous shaft load of 50.4 N·m at 40 °C while drawing 18.3 ARMS, giving the system a stable thermal operating point for sustained motion. For rapid index moves, it can deliver up to 152.3 N·m of peak torque, and its windings are capable of 9.8 kW of mechanical output when the drive reaches rated speed. A back electromotive force constant of 166.5 VRMS/krpm must be matched to the bus voltage so regenerative events do not exceed inverter limits. Phase resistance is 0.553 Ω, torque sensitivity is 2.75 N·m/ARMS, and the eight-pole rotor works with high-resolution feedback to support accurate servo loops. Static friction of 0.584 N·m and viscous damping of 0.281 N·m/krpm indicate the load the controller must overcome as motion begins and speed rises.

The stator inductance of 18.5 mH limits current ripple and, together with the 0.248 °C/W thermal resistance, affects how quickly heat moves into the frame. A rotor inertia of 0.0126 kg·m² supports stable speed behavior when the motor is coupled to larger inertial loads, while still allowing responsive acceleration with a properly sized drive. During power-off conditions, the holding brake engages at 24 VDC to maintain axis position without external clamps. Long-term temperature rise is governed by a 72 min thermal time constant, so short overload periods can be absorbed when adequate dwell time follows each high-duty interval.