Product Description:

The MAC090A-0-RD-3-C-A-0/S001 is an AC servo motor manufactured by Bosch Rexroth Indramat for the MAC AC Servo Motors series. Developed for analog drives, it supplies torque and speed control in industrial automation without a blocking brake, so any load-holding function must be managed by the external drive or machine mechanics. A built-in tachogenerator mounted on a second shaft end provides velocity feedback to the controller, giving the motor a compatible signal for legacy amplifier designs. This arrangement supports stable closed-loop operation in positioning and speed-control tasks where separate feedback devices are not required.

At rated conditions, this model delivers a continuous stall torque of 3.5 Nm while drawing a continuous standstill current of 11.4 A. During operation, the shaft can maintain a nominal speed of 3000 rpm, and brief acceleration or impact loads are covered by a peak pulse current capability of 76 A. The phase current during normal operation is 9.3 A, and the electromagnetic conversion is characterized by a torque constant of 0.34 Nm/A, which indicates the torque produced for each ampere supplied at 20 °C. Heat is removed through natural convection, and the stator has a thermal time constant of 45 minutes, allowing moderate overloads before steady-state temperature is reached.

The housing meets IP 65, which supports dust-tight service and resistance to low-pressure water jets. Total rotor inertia is 20 × 10⁻⁴ kg·m², providing a balance between responsive acceleration and stable speed regulation. The stator winding has an inductance of 3.2 mH and a resistance of 0.56 Ω at 20 °C, and these values affect current ripple and drive tuning behavior. Power enters on side A, the tacho is supplied in standard quality, and the motor relies entirely on ambient airflow for cooling. A 110 mm centering diameter also helps align the motor accurately on the machine frame.