SE-B3.075.030-04.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B3.075.030-04.000 is a synchronous servo motor from the SE Synchronous Servo Motors series with a nominal speed of 3000 rpm and a static torque of 9.3 Nm. This motor has a peak current of 57 Amps and weighs 13.1 kilograms with the brake included. It features a shaft diameter of 19 mm, a shaft length of 40 mm, and a brake supply voltage of 24 V DC.
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Product Description:
The SE-B3.075.030-04.000 belongs to the SE Synchronous Servo Motors series manufactured by Bosch Rexroth Indramat. This brushless servo motor converts drive current into precise rotary motion. It allows CNC tables, packaging actuators, and pick-and-place modules to follow demanding position or velocity profiles in automated equipment.
The motor has an electrical time constant of 10.2 ms, so phase current rises quickly when the drive applies a voltage step. A static torque capacity of 9.3 Nm allows the shaft to resist a load at zero speed without mechanical drift. For short acceleration bursts, the drive may supply up to 57 A, taking advantage of a 21 mH winding inductance that moderates the rate of current change and protects inverter switches. The winding also has a resistance of 2.1 Ω, which affects copper losses and servo gain settings. Internally, a torque constant of 0.98 Nm/A links commanded current to produced torque, while a mechanical time constant of 3.3 ms indicates that the rotor inertia permits rapid speed changes. Back EMF scales with a voltage constant of 113 V/1000 rpm, and this relationship helps determine the required drive bus capacity when regeneration occurs.
Thermal behavior is characterized by a time constant of 32 min, allowing intermittent overloads before the winding reaches its temperature limit. At standstill, the motor draws a rated current of 9.5 A. The integrated holding brake clamps the shaft when its 24 V DC ±10% supply is removed. With the brake installed, the motor has a total mass of 13.1 kg and an overall length of 327 mm. Continuous operation at the nominal speed of 3000 rpm keeps the rotor surface velocity within the bearing limits. The shaft has a diameter of 19 mm and an extension of 40 mm. These dimensions accommodate standard couplings for direct connections to gearboxes or timing pulleys without additional adapters.
