SE-LB3.075.030-10.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-LB3.075.030-10.000 is a synchronous servo motor from the SE Synchronous Servo Motors series. It offers a maximum torque of 18.6 Nm and a nominal speed of 3000 rpm. The servo motor has a mass of 12.8 kilograms and a shaft size of 19 x 40 mm.
Internal Product Review
The SE-LB3.075.030-10.000 is a Bosch Rexroth Indramat synchronous servo motor with 9.3 Nm static torque and 3000 rpm nominal speed. An 18.6 Nm maximum torque rating paired with 57 A peak current gives the motor excellent acceleration headroom for demanding servo axes.
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Product Description:
The SE-LB3.075.030-10.000 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. It is intended for closed-loop positioning and velocity control on packaging stations, pick-and-place modules, and other compact axes that favor direct electric drive. The unit measures 319 mm in overall length and has a smooth Ø19 × 40 mm output shaft without a keyway, allowing the use of different coupling styles. It is supplied without a mating connector, so the required connector and cabling can be selected for the installation.
At standstill, the motor develops a static torque of 9.3 Nm, indicating the load it can hold without motion while energized. During rated operation, the shaft reaches 3000 rpm, matching common servo drive frequency ranges for medium-speed machinery. The assembled mass is 12.8 kg, and the rotating assembly, including the tachogenerator, has a moment of inertia of 1.66 × 10⁻³ kg·m². This inertia supports responsive acceleration while smoothing minor load fluctuations. A torque constant of 0.98 Nm/A links commanded phase current to the torque produced by the motor. The back EMF constant is 113 V/1000 rpm, providing a reference for drive voltage selection. The tachogenerator supplies 2.7 V/1000 rpm ±5%, providing direct speed feedback for analog regulators.
The electromagnetic limits support a maximum torque of 18.6 Nm, allowing short bursts to overcome inertial peaks or cutting loads. To reach that torque, the drive may deliver a peak phase current of 57 A, whereas continuous holding requires a standstill current of 9.5 A. Copper loss in the stator is governed by a winding resistance of 2.1 ohms, so thermal rise calculations can use I²R scaling during duty-cycle analysis. Fuse ratings can be selected to accommodate peak current without interrupting normal acceleration cycles. Bus voltage must also provide adequate margin for the back EMF generated near rated speed. Feedback gains can be adjusted according to the tachogenerator output and the inertia of the rotating assembly.
