SE-B3.055.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B3.055.030-04.000 is part of the SE Synchronous Servo Motors series and delivers a nominal speed of 3000 rpm with a holding torque of 8.0 Nm. This servo motor features a maximum torque of 16.2 Nm, a peak current of 40 Amps, and uses a 24 V brake supply voltage.
Internal Product Review
The SE-B3.055.030-04.000 is a well-matched synchronous servo motor for demanding motion axes, offering 3000 rpm nominal speed and 6.8 Nm static torque. An 8.0 Nm holding brake and 16.2 Nm maximum torque give the motor excellent control authority and dependable performance in servo applications.
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Product Description:
The SE-B3.055.030-04.000 is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. The brushless unit is installed on automated axes where precise velocity and position loops are driven by a compatible servo amplifier. By converting three-phase electrical energy into controlled rotary motion, the motor supports packaging, handling, and small assembly stations that require frequent acceleration, steady running, and exact holding at standstill. Its brushless design also avoids commutator wear and helps maintain consistent response during repeated start-stop cycles.
At a nominal shaft speed of 3000 rpm, the rotor can deliver a continuous torque of 6.8 Nm. Electromagnetic conversion is characterized by a torque constant of 1.02 Nm/A, while generated back-EMF rises in proportion to the 113 V/1000 rpm voltage constant. For rapid transients, the winding can accept a phase peak current of 40 A, and the drive needs 6.7 A at standstill to reach rated torque. Current rise is limited by an electrical time constant of 8.4 ms, a winding inductance of 30 mH, and a resistance of 3.53 Ω, which affect control-loop bandwidth and thermal loading.
The integrated holding brake clamps the shaft with 8.0 Nm when supplied by 24 V ±10 % and draws 0.8 A during brake operation; its added inertia is 0.12 × 10−3 kg·m². During acceleration, the electromagnetic circuit can reach a maximum torque of 16.2 Nm, providing reserve for indexing moves beyond continuous load limits. Mechanical coupling is through a shaft that measures Ø19 × 40 mm, matching common keyed hubs and gearheads. Brake inertia and shaft dimensions should be considered with the connected load so the axis can achieve the required acceleration without exceeding the motor's continuous operating range.
