Product Description:

The MAC090B-0-JD/110-0/J625/S01 is a three-phase servo motor produced by Bosch Rexroth Indramat as part of the MAC AC Servo Motors series. It is intended for analog drive systems that regulate torque, speed, and position through voltage and current loops. By converting electrical energy into controlled rotation, the unit moves tooling, conveyors, or axes in automated lines. A 110 mm centering diameter simplifies flange mounting, and the sealed housing allows installation without auxiliary fans.

At standstill, the motor can deliver 6.7 Nm continuously while drawing 18.2 A, so thermal limits are not exceeded during static holding or low-speed operation. When the drive excites the windings up to the nominal electrical frequency, the shaft reaches 3000 rpm, a speed appropriate for indexing tables and moderate-speed spindles. Short acceleration bursts are supported by a maximum peak pulse current of 137 A, giving headroom for rapid starts without saturation. Dynamic response is influenced by the rotor’s moment of inertia, specified at 0.0036 kgm², which balances load matching with quick reversals. For every ampere supplied, the electromagnetic circuit generates 0.41 Nm/A of torque, which helps with drive tuning calculations.

Heat accumulated in the stator dissipates slowly because the thermal time constant is 60 min, so duty cycles must consider delayed temperature rise under natural convection cooling. The laminated core presents a winding inductance of 2.0 mH, shaping current rise and filtering high-frequency ripple from the analog amplifier. Copper resistance at 20 °C is 0.38 Ohm, which affects I²R losses during sustained output. An 18 kg mass, incremental encoder feedback, and the absence of a blocking brake simplify installation, while IP65 sealing lets the frame operate in machinery that lacks forced airflow.