MAC090B-0-PD-1-B/110-A-1/I625/S001 by Bosch Rexroth Indramat

The MAC090B-0-PD-1-B/110-A-1/I625/S001 is an AC servo motor manufactured by Bosch Rexroth Indramat within the MAC AC Servo Motors series. Intended for analog drive systems, it converts command voltages into controlled shaft motion for positioning and speed regulation in industrial equipment. Incremental encoder feedback supplies the drive with position data. A standard blocking brake holds the load when supply power is removed, and natural convection cooling permits operation in enclosed cabinets without forced airflow.

Its continuous mechanical output corresponds to a continuous stall torque of 7.2 Nm, delivered while drawing a continuous stall current of 11.9 A from the connected drive. Under rated excitation, the rotor reaches a nominal speed of 1500 rpm, providing stable operation for indexing tables or feed axes. For short acceleration bursts, the drive may command a maximum peak current of 86 A, allowing the motor to overcome inertial or frictional peaks without losing synchronism. The torque constant is 0.67 Nm/A, which indicates the torque produced for each ampere applied to the windings at 68 °F.

Dynamic behavior is influenced by a rotor inertia of 0.0036 kg·m², which supports smooth start-stop cycles without excessive demand on the drive. The motor has a mass of 18 kg, which adds thermal stability and helps reduce vibration when the housing is flange-mounted on a 110 mm centering register. The winding inductance is 5.1 mH, and this affects current rise time and servo response. Heat absorbed during operation dissipates gradually because the thermal time constant is 60 minutes, which suits duty cycles that alternate between load and idle periods. Power leads exit on side A through a keyed connector, and a tacho generator outputs 3 V per 1000 rpm to provide an analog speed signal for legacy controllers.