SE-B4.090.030-01.000 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B4.090.030-01.000 is part of the SE Synchronous Servo Motors series and features a nominal speed of 3000 rpm with a static torque of 9.0 Nm. This servo motor has a flange size of 142 mm and a shaft size of 24 by 50 mm. It delivers a peak current of 62 Amps and a standstill current of 10 Amps, with a thermal time constant of 28 minutes.
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Product Description:
The SE-B4.090.030-01.000 is a synchronous servo unit manufactured by Bosch Rexroth Indramat within the SE Synchronous Servo Motors series. It converts controlled stator current into rotary torque for coordinated axis motion in packaging lines, machining centers, and automated assembly equipment. Integrated tachogenerator sensing provides real-time speed feedback to the drive, allowing the controller to correct speed changes and maintain commanded position during dynamic moves. This arrangement lets the motor operate as a compact closed-loop motion source without requiring a separate external speed transducer.
Mounting uses a 142 mm square flange that fits common gearbox and machine interfaces, and the shaft measures 24 mm in diameter and 50 mm in length for direct coupling. At rated load, the rotor maintains 3000 rpm, and the motor can hold 9.0 Nm of static torque when the shaft is locked. Its torque constant is 0.87 Nm/A, so current is converted into usable torque in a predictable way, while transient demand is limited to a peak current of 62 A. Current reaches its commanded value in 8.2 ms, with winding values of 16.1 mH inductance and 1.92 Ω resistance shaping the electrical response. The mechanical time constant is 5.1 ms, the ramp-up time is 45 ms, standstill current is 10 A, and tachogenerator feedback is calibrated at 2.7 V per 1000 rpm ±5% for compatibility with Rexroth velocity controllers.
Thermal behavior is characterized by a winding heating time of 28 min, which allows short overload periods before steady-state temperature is reached. Rotor inertia is 2.18 × 10⁻³ kg·m², giving a balance between quick acceleration and stable motion during low-speed operation and position holding. Back EMF is 97 V/1000 rpm, which is important for drive voltage matching and controlled energy return during deceleration.
