SE-KB4.090.030-00.011 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-KB4.090.030-00.011 is part of the SE Synchronous Servo Motors series and has a mass of 13 kg with a maximum length of 252 mm. It features a nominal speed of 3000 rpm, peak current of 62 Amps, and a maximum torque of 27.5 Nm. The servo motor offers a torque constant of 0.90 Nm per Amp and a winding resistance of 1.90 Ohm.
Internal Product Review
The SE-KB4.090.030-00.011 is a synchronous servo motor that stands out with 3000 rpm nominal speed and 9.0 Nm static torque. Low rotor inertia of 2.18 x 10^-3 kgm² and 27.5 Nm maximum torque make this unit a strong performer for fast, precise axis control.
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Product Description:
The SE-KB4.090.030-00.011 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. Designed for closed-loop motion axes and pick-and-place modules, the motor converts electrical drive current into controlled rotary torque for industrial automation tasks. It has a mass of 13 kg and an overall length of 252 mm, providing a compact package for installation on machinery. The flange has an R accuracy grade, while the motor’s R vibration grade supports balanced operation in applications with specific vibration limits.
Under continuous duty, the motor reaches a nominal shaft speed of 3000 rpm and delivers a standstill torque of 9.0 Nm when energized but motionless. In this state, the phase windings draw a standstill current of 10 A. The torque constant is approximately 0.90 Nm/A, indicating the relationship between applied current and generated torque. The electromagnetic circuit reaches the commanded value within an electrical time constant of 9.0 ms, while rotor acceleration follows a mechanical time constant of 4.8 ms. An inductance of 17.1 mH and a winding resistance of 1.90 Ω establish the impedance presented to the inverter, affecting current ripple and thermal dissipation. The mounting interface maintains accurate alignment between the motor shaft and the connected machine assembly.
For short operating intervals, the drive can apply up to 27.5 Nm of torque, allowing the axis to overcome inertia from gearing or connected loads. Achieving this peak torque requires a phase current of 62 A, which the stator can accommodate without demagnetization. The generated back electromotive force is 98 V/1000 rpm, providing the controller with an electrical value for sensorless speed estimation. Dynamic response is supported by a rotor inertia of 2.18 × 10⁻³ kg·m², balancing quick directional changes with stable velocity regulation. This inertia also affects the acceleration available for rapid indexing motions in material-handling and packaging equipment.
