Product Description:

The MHP090B-058-HG1-UNNNNN is an AC synchronous motor manufactured by Bosch Rexroth Indramat for the MHP Synchronous Motors series. It converts drive power into controlled rotary motion for positioning and speed regulation on packaging, material-handling, and assembly equipment in industrial automation. The motor interfaces with Rexroth digital drives to close the servo loop and keep axis accuracy within required tolerances. Its synchronous design is well suited to axes that require repeatable acceleration, stable low-speed operation, and consistent response during frequent start-stop movement.

As a naturally cooled unit, the motor delivers a continuous standstill torque of 12.0 Nm while relying on airflow across its finned frame. This housing uses natural convection cooling, so no auxiliary fan or liquid circuit is required. The housing is rated IP65, which keeps dust and low-pressure water jets away from internal components. Rotor position is reported by an incremental encoder with 2048 increments, giving the drive fine feedback resolution for speed and position control. This feedback helps the connected drive correct small speed deviations and maintain smooth motion. Electrical behavior follows winding code 058, which sets the resistance, inductance, and current limits for the 090-frame stator. The motor uses a plain shaft with a sealing ring, and the B-length body provides a balance between inertia and torque capacity.

The motor includes a parking brake rated at 11.0 Nm, allowing vertical or suspended axes to hold when mains power is absent. Acceptable ambient conditions range from 0 to +40 °C, so the unit can be installed in standard machinery enclosures without extra climate control. A detachable power plug with a turnable 270° connector eases cable routing in compact spaces where cable exit direction matters. Insulation class F permits winding temperatures up to 155 °C, which supports thermal durability under cyclic loads. The parking brake is intended to hold the axis at rest rather than provide operating torque during motion.