Product Description:

The MT304B1-R2C1 is a brushless servo motor produced by Kollmorgen within the MTC Servo Motors series. As a rotary actuator, it converts controlled electrical energy into precise shaft motion for positioning, velocity, or torque loops in automated machines such as pick-and-place heads, indexing tables, and packaging axes. Its design and feedback compatibility allow the motor to interface directly with Kollmorgen servo drives used throughout industrial automation. The frame size and winding code in the designation place the unit in the mid-torque segment.

At the electrical interface, the winding accepts a maximum bus voltage of 250 VRMS, and its back electromotive force is 28.6 VRMS/krpm, which affects drive voltage requirements at high speed. Continuous operation draws 5.26 ARMS, while the drive can supply 20.9 ARMS for short transients. These current levels correspond to a torque constant of 0.473 N-m/ARMS and a winding resistance of 1.79 ohms. Rated output reaches 1.31 kW at 6000 rpm, supported by a 14 mH inductance that smooths current ripple and helps the drive regulate winding current during rapid command changes.

The motor provides a peak torque of 7.41 N-m and a continuous stall torque of 2.61 N-m at 25 °C, which decreases to 2.45 N-m at 40 °C as thermal gradients rise. With a rotor inertia of 0.0000808 kg·m², the motor can reach a calculated maximum acceleration of 91,714 rad/s², allowing rapid indexing with minimal settling time. Heat generated in the windings is transferred through a thermal path rated at 0.891 °C/W. The 25-minute thermal time constant indicates how gradually the winding temperature changes under load, supporting stable operation during extended duty cycles. Appropriate drive sizing should account for the available bus voltage, transient current demand, operating temperature, and required acceleration profile without exceeding the motor’s thermal capacity.