Product Description:

The MAC090C-0-GD-4C/110-A-1 belongs to the MAC AC Servo Motors series from Bosch Rexroth Indramat. It is a motor for analog drives that converts command currents into controlled rotary motion for industrial positioning and velocity loops. In automated equipment, it is suited to axes that need repeatable speed regulation and accurate position response from an external drive amplifier. Natural convection cooling eliminates the need for external fans, and the 110 mm centering diameter simplifies flange alignment when the unit is installed in machine frames or gear stages.

Under rated conditions, the rotor turns at 3000 rpm, while the shaft can deliver a continuous stall torque of 9.6 Nm with a corresponding continuous stall current of 24.8 A. A torque constant of 0.43 Nm/A links produced torque to applied phase current, allowing predictable closed-loop control. The GD winding set presents low electrical impedance with 1.5 mH of inductance and 0.24 Ω of resistance, which helps limit voltage overshoot when the drive issues rapid current steps. The 60-minute thermal time constant indicates how quickly the winding temperature rises, so normal duty cycles can run without auxiliary cooling. Tacho feedback or incremental and absolute encoders are supported to report speed and position back to the analog controller.

For short acceleration bursts, the inverter may inject a peak pulse current of 196 A. Mechanical energy can be held at a standstill by a spring-applied brake that supplies 6.5 Nm of static torque once its 24 V DC coil at 0.7 A is de-energized, and release occurs after a 60 ms delay. This brake arrangement is useful when the axis must remain in place after power is removed. The rotor inertia is 53 × 10^-4 kgm^2, providing a balance between dynamic response and load damping. Speed is monitored through a built-in tacho that generates 3 V/1000 rpm, which the drive uses to verify commanded velocity.