Product Description:

The MAC90B-0-JD-3-B/110-A-0/S01 is an AC servo motor produced by Bosch Rexroth Indramat within the MAC AC Servo Motors series. Built as a motor for analog drives, it transforms drive-amplifier current into rotary motion for automated axes and handling modules. The housing seats against machine frames through a centering diameter of 110 mm. The motor is supplied without a blocking brake, allowing the load to be held by external mechanics or continuous servo torque. Cooling is provided by natural convection, so airflow across the ribbed stator surface carries heat away without auxiliary blowers. The motor can maintain its rated output at installation elevations up to 1000 m without derating.

Under continuous stall conditions, the shaft can deliver 6.7 Nm while drawing 18.2 A; this operating point corresponds to the thermal equilibrium established by the 60-minute thermal time constant. When the drive commands motion, the rotor accelerates toward a nominal speed of 3000 rpm. Its moderate inertia of 36 × 10⁻⁴ kg·m² helps limit overshoot during reversals. The motor has a torque constant of 0.41 Nm/A, so each ampere supplied by the analog amplifier produces a proportional increase in torque. The phase winding resistance is 0.38 Ω, which contributes to copper losses as current passes through the windings. These electrical characteristics support controlled torque production across positioning, indexing, and speed-regulated operations.

A higher dynamic margin is available through a peak pulse current of 137 A for rapid indexing or sudden loads. The enclosure has an IP65 protection rating, which prevents dust ingress and resists low-pressure water jets during washdown cleaning. The motor has a total mass of 18 kg, contributing to mechanical damping when it is rigidly mounted. Its phase inductance is 2.0 mH, helping filter switching harmonics from the analog drive and support smooth current control. Natural convection eliminates the maintenance requirements associated with an auxiliary cooling fan. The sealed housing also helps protect the stator and internal electrical components from airborne contaminants in industrial production areas.