MHD090B-047
The MHD090B-047 is an AC synchronous motor built by Bosch Rexroth Indramat and supplied within the MHD Synchronous Motors series. It serves as a rotary actuator for closed-loop motion axes in industrial automation cells, where precise torque delivery at zero speed and during operation is required. Electronic commutation keeps torque ripple low throughout the speed range, which helps the drive maintain smooth motion during positioning and constant-speed tasks. This behavior is useful on axes that must start, stop, and reverse without uneven shaft movement.
The unit provides a continuous standstill torque of 12.0 Nm, allowing it to support static loads during dwell periods. A square flange dimension of 140 mm establishes the mechanical interface for direct coupling to reducers or machine frames, while the positioning pilot uses a 110 mm centering recess for accurate concentric alignment. The frame designation 090 places the motor in the 90-size housing group, which helps maintain compatibility with related mounting arrangements. Electrical performance is matched to winding set 047, which corresponds to the phase resistance, inductance, and voltage constant used with compatible Rexroth digital drives. These values support continuous or cyclic motion without pushing the stator beyond its intended thermal limits.
The centering diameter, flange size, and B motor length establish the motor's installation envelope for couplings, pulleys, and adjacent machine components. As a Servo Motor, the unit includes integrated rotor feedback provisions and thermal sensing needed for closed-loop control. This layout helps maintain accurate alignment during assembly and supports responsive operation in compact automation systems. It also allows the motor to fit tightly spaced machine sections where predictable mounting space is important.
