Product Description:

The MTC328B1-R1D1 is a brushless servo motor produced by Kollmorgen and supplied within the MTC Servo Motors series. It is engineered to provide closed-loop torque and speed control on automated axes such as pick-and-place heads, indexing tables, and packaging spindles, where stable feedback is needed for repeatable motion. This makes it suitable for applications that alternate between precise positioning and steady running. A 24 VDC spring-applied brake is integrated so the load can be held when system power is removed, making the motor suitable for vertical loads or controlled stopping points where the axis must remain in position without a separate holding device.

During continuous operation, the winding draws 3.65 ARMS and produces a rated mechanical output of 1.18 kW. At zero speed, the rotor resists load with a stall torque of 4.70 N·m at 25 °C, while short transients can reach a peak torque of 18.68 N·m without demagnetizing the permanent magnets. The three-phase inductance is 35 mH, so current rise is inherently filtered and the drive current loop is less abrupt during starts and rapid speed changes. Additional electrical data include a 4.22 Ω DC resistance, a permissible peak line current of 18.7 ARMS, a thermal resistance of 0.788 °C/W, and a rotor inertia of 1.749 × 10⁻⁴ kg·m².

A torque constant of 1.238 N·m/ARMS matches a back-EMF constant of 74.9 VRMS/krpm, which helps the drive predict voltage demand across the speed range. These motor constants are also useful when matching the motor to a compatible amplifier. The rotor uses eight poles to create strong magnetic coupling, and the thermal time constant is 33 min, which allows short overload periods before the motor reaches steady-state temperature. With the brake installed, the assembly weighs 6.1 kg, and the 40 °C stall rating of 4.41 N·m shows only limited derating at common enclosure temperatures.