Product Description:

The SE-B4.210.050-08.000 is a synchronous servo motor produced by Bosch Rexroth Indramat for the SE Synchronous Servo Motors series. It serves as a compact electromechanical actuator that converts controlled drive current into accurately regulated torque and speed, enabling repeatable positioning in automation cells, packaging stations, and material-handling axes where closed-loop performance is required. Mounting is facilitated by a 142 mm square flange, while the 24 × 50 mm shaft provides a direct mechanical interface for couplings or gear reducers.

Under rated conditions, the rotor spins at 5000 rpm and delivers a standstill torque of 21 Nm when locked. Each ampere supplied by the inverter generates approximately 0.64 Nm/A of torque, representing the motor’s electromagnetic conversion factor. Current reaches its target value within an electrical time constant of 12.0 ms, while a rotor inertia of 4.98 × 10⁻³ kg·m² supports responsive operation and smooth load control. Power conductors with cross-sectional areas up to 6.0 mm² can be terminated in the connector area to accommodate the continuous current requirements. A winding resistance of 0.27 Ω and an inductance of 3.3 mH provide predictable electrical impedance for drive-loop tuning. These electrical characteristics allow the controller to regulate winding current as operating speed and mechanical load change.

Rapid acceleration is possible because the windings tolerate a standstill current of 28 A, and the electromagnetic system can momentarily produce a peak torque of 52 Nm when paired with an Sm50/100 drive module. Thermal saturation is moderated by a time constant of 32 min, allowing cyclic loads without excessive temperature fluctuations. During high-speed operation, the motor generates a back electromotive force of 68 V/1000 rpm, which the drive electronics must overcome to maintain the commanded velocity. A mechanical time constant of 3.3 ms completes the dynamic model and supports accurate adjustment of the control-loop response. The drive must account for the motor’s back electromotive force as speed rises to preserve current regulation and available torque. Its thermal response also permits brief periods of elevated loading while limiting rapid winding-temperature changes.