Product Description:

The MAC90B-0-PD-2-C/110-B-1/S01 is a brushless AC servo motor produced by Bosch Rexroth Indramat for the MAC AC Servo Motors series. It is intended for analog drives and converts three-phase power from a drive module into controlled shaft motion for positioning tables, packaging axes, or transfer systems. The unit has a 110 mm centering diameter for precise alignment. It relies on natural convection cooling, making it suitable for installation inside machinery where forced airflow is unavailable.

The motor delivers a continuous torque of 7.2 Nm at standstill while drawing a continuous current of 11.9 A. These values indicate the mechanical output and phase current that the motor can sustain under the stated cooling conditions. With a torque constant of 0.67 Nm/A, the drive controller can calculate torque generation directly from phase current. Under rated conditions, the shaft rotates at 2000 rpm. The integrated tachogenerator provides a feedback signal of 3 V/1000 rpm, which the analog drive uses for speed regulation. The winding has an inductance of 5.1 mH and a resistance of 0.97 Ω, which affect the response of the current control loop.

During acceleration, the windings can accept up to 86 A of peak pulse current, producing short-term torque above the continuous rating. A maintenance-free holding brake supplies 6.5 Nm of holding torque to secure loads when motor power is absent. The brake engages at 24 V DC ±10% and draws 0.7 A. The rotor has a moment of inertia of 36 × 10⁻⁴ kg·m², providing moderate responsiveness without excessive overshoot. The motor has a total mass of 18 kg. Heat is absorbed by the steel frame, and a thermal time constant of 60 min indicates how quickly the winding temperature approaches equilibrium.