Product Description:

The MAC90C-0-GD-4-C/110-A-0/GR277/S01 is a servo motor from Bosch Rexroth Indramat's MAC AC Servo Motors series. Designed for analog drives, it converts stator current into regulated torque and speed for conveyors, gantries, or spindle axes. Tacho feedback, combined with a mounted encoder, supplies the drive with real-time velocity data so commanded motion remains stable during changing load conditions. This arrangement supports precise speed regulation in general industrial motion applications without requiring a separate feedback package.

In continuous operation, the rotor may be driven up to 3000 rpm, which suits many production machines that need steady running speed with responsive control. At standstill, the motor can support a load with 9.6 Nm of torque while drawing 24.8 A, so the connected drive must be able to supply that holding current when the shaft must resist motion. The electromagnetic design provides a torque constant of 0.43 Nm/A, which gives a predictable relationship between commanded current and developed torque. A phase resistance of 0.24 Ohm helps limit resistive heating during steady operation and influences the electrical response seen by the analog drive.

For short acceleration periods, the motor can accept peak pulse current up to 196 A, and the rotor inertia of 0.0053 kgm² supports stable speed changes without making the response overly sluggish. The housing is rated IP65, which helps protect internal parts from dust and water jets in industrial environments, and the motor mass of 23 kg adds useful thermal capacity during cyclic duty. Heat is removed by natural convection, and the 60-minute thermal time constant indicates that temperature rises gradually rather than immediately under repeated load changes. The unit is supplied without a blocking brake, so any required holding at power-off must be provided by external means. A centering diameter of 110 mm supports accurate flange alignment, the 1.5 mH winding inductance smooths current transitions, and the tacho signal of 3 V/1000 rpm provides proportional velocity feedback for the analog controller.