Product Description:

The SE-KB4.090.030-04.000 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. As a rotary actuator for industrial automation, it converts controlled electrical input from a drive into precise shaft motion. This operation allows machinery to position loads accurately at varying speeds and torque levels.

The motor can lock its shaft with a holding torque of 18 Nm, produced by an electromechanical brake supplied with a rated voltage of 24 V ±10%. Under continuous operation, the rotor spins at a nominal speed of 3000 rpm, which matches many standard gear ratios and conveyor line requirements. Each ampere of armature current generates approximately 0.90 Nm/A of torque, so drive scaling is straightforward when sizing current loops. During acceleration or load surges, the stator may demand up to 62 A; this peak current affects the required cable cross section and inverter output-stage capacity. The integrated tacho generator raises total rotor inertia to 2.18 × 10⁻³ kg·m², while the brake contributes 0.90 × 10⁻³ kg·m², so start-stop cycles should account for this additional energy storage.

The static torque of 9.0 Nm indicates the load the motor can sustain at standstill without exceeding temperature limits, while the maximum torque of 27.5 Nm is available for short-term transients. The winding inductance is 17.1 mH, which affects the current rise time and torque-loop bandwidth, while the voltage constant of 98 V/1000 rpm indicates the back electromotive force that the drive must overcome at speed. The motor also has a phase resistance of 1.90 Ω and a flange diameter of 185 mm that matches IEC mounting interfaces. Its keyed shaft measures 19 mm in diameter and 28 mm in length for transmitting power to couplings or gearboxes, while the brake has a mass of 1.7 kg and a nominal current of 1.0 A.