SE-B3.055.030-00.015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B3.055.030-00.015 is part of the SE Synchronous Servo Motors series and delivers a nominal speed of 3000 rpm and max torque of 16.2 Nm. This servo motor features a peak current of 40 Amps and has a shaft with keyway and feather key design. Its torque constant is 1.02 Nm per Amp and the winding resistance is 3.53 Ohms.
Internal Product Review
The SE-B3.055.030-00.015 is a Bosch Rexroth Indramat SE synchronous servo motor with a nominal speed of 3000 rpm. Static torque of 6.8 Nm and max torque of 16.2 Nm give the motor strong low-speed holding and confident acceleration under changing loads. A torque constant of 1.02 Nm/A supports efficient servo response, making the motor a strong fit for precision motion systems.
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Product Description:
The SE-B3.055.030-00.015 is a synchronous servo motor from Bosch Rexroth Indramat and is part of the SE Synchronous Servo Motors series. As a permanent-magnet AC unit, it converts drive current into rotational motion for positioning axes and cyclic transfer mechanisms in industrial automation cells. Its shaft is machined with a keyway and is delivered with a matching A6x6x32 feather key, allowing direct coupling to pulleys, gearboxes, or rigid couplings.
During continuous operation, the rotor can turn at a nominal speed of 3000 rpm, which is the synchronous surface speed achievable under rated voltage and load. To generate acceleration or handle load spikes, the motor may draw up to 40 A of peak phase current, and this transient ceiling helps determine drive sizing. Torque production is predictable because each ampere contributes roughly 1.02 Nm/A. When statically energized, the magnetic circuit produces 6.8 Nm of static torque, so the shaft can hold loads at zero speed without a mechanical brake. Back EMF reaches 113 V/1000 rpm, which controllers can use to estimate speed and set DC-bus limits.
The servo’s dynamic behavior depends on an electrical time constant of 8.4 ms, indicating how quickly stator current reaches its commanded value after a step change. Coupled to a rotor inertia of 1.21 × 10⁻³ kg·m², the system accepts rapid speed modulation while limiting overshoot. The thermal time constant is 29 min, so continuous cycling can continue for an extended period before winding temperature approaches rated limits. Magnetic energy storage depends on a winding inductance of 30 mH, which filters current ripple and supports smooth torque. The 2.5 mm² connection area eases termination, and a standstill current of 6.7 A supports low-speed holding without excess loss.
