Product Description:

The SE-B4.210.030-00.000 is a synchronous servo motor manufactured by Bosch Rexroth Indramat for the SE Synchronous Servo Motors series. The unit is intended for closed-loop motion axes where fast acceleration and repeatable velocity are required, such as inserters, gantry drives, or spindle heads. It converts three-phase drive current into mechanical rotation while the built-in tachogenerator supplies real-time speed feedback to a controller.

The motor mounts to a machine frame with a 142 mm square flange and has a total body length of 347 mm. With a mass of 22.0 kg, it provides the stiffness needed for rapid direction changes while keeping moving weight moderate. Static torque reaches 21 Nm at standstill, and the continuous standstill current required for that load is 23 A. Under transient demand, the shaft can deliver a maximum torque of 57.4 Nm, while nominal operation stabilizes at 3000 rpm. The rotor’s moment of inertia is 4.98 × 10⁻³ kg·m², supporting quick speed ramps without excessive overshoot. Mechanical output is transferred through a 24 × 50 mm shaft with a keyway and feather key, preventing pulleys or rigid couplings from slipping under load.

Electrical capacity allows a peak winding current of 158 A, while the torque constant of 0.92 Nm/A links delivered torque directly to phase current. Magnetic response is influenced by a winding inductance of 6.2 mH and a phase-to-phase resistance of 0.51 Ω; these values affect current rise time and copper losses during operation. A tachogenerator EMF of 2.7 V/1000 rpm ±5% provides a proportional voltage for velocity control loops, and the voltage constant of 102 V/1000 rpm indicates the back EMF presented to the drive. This feedback allows the controller to monitor shaft speed and correct deviations caused by changing mechanical loads. The electrical characteristics also help the connected drive regulate current during acceleration, steady operation, and controlled deceleration.