MT304A1-R1D1 Kollmorgen
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The MT304A1-R1D1 is a servo motor from Kollmorgen's MTC Servo Motors series. It provides a continuous torque of 2.52 N·m at 40°C and a peak torque of 7.40 N·m, with a rated speed of 3000 rpm and a rated power of 0.70 kW. The motor has a back EMF of 59.6 VRMS per krpm and weighs 3.3 kg without a brake.
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Product Description:
The MT304A1-R1D1 is a brushless servo motor produced by Kollmorgen for the MTC Servo Motors series. In automated machinery, this motor converts commanded drive current into precise shaft rotation, supporting accurate positioning and speed regulation on packaging stations, pick-and-place heads, and light machine tools. Its compact frame and moderate power rating support responsive motion control on axes where installation space and payload are limited. The brushless design also avoids the mechanical wear associated with brushes while providing controlled rotation through a compatible servo amplifier.
At 40 °C, the motor can sustain a continuous torque of 2.52 N·m while drawing a continuous line current of 2.59 A RMS. These values indicate the continuous operating limits available without excessive thermal rise. Torque sensitivity is 0.985 N·m per ampere, so an increase in amplifier current produces a proportional increase in torque within the motor’s operating range. A back electromotive force of 59.6 V RMS/krpm indicates how the generated voltage rises with shaft speed and helps determine the required drive-bus voltage. For short acceleration periods, the rotor can produce a peak torque of 7.40 N·m when peak current reaches 10 A RMS. The motor can operate at speeds up to 3000 rpm, supporting rapid indexing and other applications that require controlled high-speed motion.
Dynamic response depends on a rotor inertia of 0.0000808 kg·m², and this low value helps reduce settling time when direction or setpoint changes. A phase-to-phase inductance of 58 mH smooths current ripple and supports stable control with high-frequency pulse-width modulation drives. The windings tolerate line-to-line voltages up to 250 V RMS, allowing connection to many amplifiers in the 230 V class. Heat capacity is characterized by a thermal time constant of 25 min, so winding temperature rises gradually during load transients and leaves predictable operating margin for intermittent duty cycles. The assembly weighs 3.3 kg, minimizing the additional moving mass when the motor is mounted on a gantry, positioning slide, or other mobile machine axis.
