MT328B1-R1C1 Kollmorgen
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The MT328B1-R1C1 servo motor is part of the MTC Servo Motors series from Kollmorgen and provides a rated power of 1.18 kW with a continuous stall torque of 4.70 Newton-meters at 25 degrees Celsius. It features eight poles, a back EMF of 74.9 VRMS per krpm, and a peak torque of 18.68 Newton-meters. The motor has a rotor inertia of 0.0001749 kg-m^2 and a thermal time constant of 33 minutes.
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Product Description:
The MT328B1-R1C1 is a brushless servo motor manufactured by Kollmorgen and supplied under the MTC Servo Motors series. It is intended for closed-loop industrial automation tasks that require precise torque and velocity control, such as packaging axes, electronic assembly lines, and indexing tables. With a rated mechanical output of 1.18 kW, or 1.59 hp, the motor converts electrical energy from a matched drive into rotational motion while maintaining accurate feedback for position control.
The motor has a back electromotive force constant of 74.9 VRMS/krpm, which allows the drive to scale voltage commands according to speed. The stator windings draw a continuous line current of 3.65 ARMS at an ambient temperature of 25 °C and generate a continuous stall torque of 4.70 N-m, supplying steady holding force when the shaft is locked. An inductance of 35 mH filters rapid current changes, helping the controller manage current ripple and reduce heat associated with the 4.22 Ω DC resistance measured at 25 °C. A torque sensitivity of 1.238 N-m/ARMS indicates how much torque is produced for each ampere of commanded current, allowing load response to be calculated accurately. Eight magnetic poles establish the number of electrical cycles completed during each mechanical revolution. At an ambient temperature of 40 °C, the continuous stall torque decreases to 4.41 N-m to keep the motor within its thermal limits.
During transient operation, the windings can accept a peak current of 18.7 ARMS and deliver a peak torque of 18.68 N-m, supporting a theoretical acceleration limit of 106,831 rad/s² before saturation occurs. The rotor has a low inertia of 0.0001749 kg-m², enabling rapid torque reversals with limited overshoot during point-to-point movements. Thermal performance is governed by a thermal resistance of 0.788 °C/W and a thermal time constant of 33 minutes, which indicate the relationship between power loss and temperature rise as well as the rate at which the motor responds to changes in thermal load.
