Product Description:

Bosch Rexroth Indramat manufactures the SR-B5.0250.020-10.000 synchronous servo motor for the SR Synchronous Servo Motors series. The unit is intended for numerically controlled machines and automated handling axes where closed-loop speed and position regulation are required. An integrated resolver allows the associated drive to monitor the rotor angle in real time and issue correction currents. This feedback helps the motor maintain commanded trajectories and deliver repeatable torque during forming, cutting, or material-transfer cycles.

The stator windings are optimized for a DC link voltage of 670 V; operating on this high bus voltage minimizes conductor size and reduces copper losses at proportional power levels. When the rotor is locked, the phases conduct 10 A RMS and produce a locked-rotor torque of 23 Nm, allowing the shaft to hold fixtures or loads without an external brake. Position feedback is supplied by a resolver that delivers 8,192 increments per revolution, and its reference accuracy remains within ±10 angular minutes. These values support fine interpolation of intermediate angles and tight velocity loops, which are essential for multi-axis interpolation and contouring tasks.

The housing has a length of 300 mm, providing a compact envelope and sufficient magnetic stack depth for continuous duty. The motor has a mass of 24 kg, which must be considered when mounting it on gantries or articulated joints. A rated speed of 2,000 rpm establishes the continuous shaft velocity, while the torque constant of 2.3 Nm/A relates commanded current to output torque for straightforward drive tuning. The motor uses an IM B5 flange and a smooth 32 × 58 mm shaft that accommodates flexible coupling options. Its rotor inertia is 83 × 10⁻⁴ kg·m², supporting controlled acceleration during positioning movements. Shock resistance of up to 6 g supports installations subject to rapid indexing or end-of-stroke impacts.