Product Description:

The MHD090B-035-NG0-UN servo motor is manufactured by Bosch Rexroth Indramat for the MHD Synchronous Motors series. It is intended for precision velocity and torque loops in automated machinery that must run continuously without thermal derating. A frame size of 090 and the B-length stator provide a compact package while keeping overall mass moderate for mid-range rotary axes in packaging lines, gantry systems, and metal-cutting centers. Its synchronous motor design supports accurate response during acceleration, deceleration, and steady-state operation where repeatable motion is required.

The motor delivers a continuous standstill torque of 12.0 Nm, allowing it to hold or position loads without external gearing. Rotor alignment to driven equipment is simplified by a centering diameter of 110 mm, and mounting holes match the square 140 mm flange pattern common on Rexroth gearboxes. Position feedback is supplied by digital servo feedback (HSF); this high-resolution encoder transmits absolute position data to the drive for closed-loop commutation and dynamic error correction. This feedback arrangement allows the drive to monitor rotor motion continuously during changing load conditions. Heat generated in the stator windings is removed through liquid cooling, so rated torque can be produced even inside sealed cabinets with limited airflow. The winding layout suits medium line voltages and standard MHD inverters.

A plain shaft is provided for backlash-free coupling to timing belts or clamp hubs, and a shaft seal limits lubricant migration into the housing. This arrangement suits applications that use direct couplings instead of keyed shaft connections. The unit is supplied without a holding brake, so static load retention must be handled by the drive or external mechanics. Power and feedback connectors can be rotated through 270°, giving flexibility when space behind the motor is restricted. Winding designation 035 indicates the conductor cross-section and number of turns, which affect current demand and back EMF. Relative position detection is available after drive homing, and the housing maintains uniform thermal expansion across the stator sleeve.