SE-B5.700.020-04.030 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat SE-B5.700.020-04.030 is part of the SE Synchronous Servo Motors series and features a nominal speed of 2000 rpm with a static torque of 74 Nm. It delivers a maximum torque of 149 Nm and a peak current of 261 A. The servo motor has a holding brake torque of 56 Nm and a brake supply voltage of 24 V DC.
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Product Description:
The SE-B5.700.020-04.030 servo motor is manufactured by Bosch Rexroth Indramat for the SE Synchronous Servo Motors series. As a permanent-magnet synchronous unit, it converts drive current into rotary motion for positioning axes and continuous-duty processes in industrial automation systems. Integrated feedback supports precise speed control, while the holding brake secures the connected load when power is removed. This combination allows the motor to control moving equipment and prevent unintended shaft movement while the machine is stopped.
At its rated operating point, the rotor reaches a nominal speed of 2000 rpm. The motor provides a standstill torque of 74 Nm with 43 A of continuous current and has a torque constant of 1.71 Nm/A. For short bursts, the drive can deliver up to 261 A, allowing the machine to accelerate rapidly or overcome brief overloads. Electrical behavior is influenced by a winding inductance of 4.2 mH and a resistance of 0.19 Ω, which affect current rise time and electrical losses. The back EMF follows a voltage constant of 185 V per 1000 rpm, which must be considered when selecting a compatible inverter. These electrical values allow the drive to regulate current according to changing torque demands during acceleration, steady operation, and deceleration.
The rotor has a moment of inertia of 28.8 × 10⁻³ kg·m², while the brake adds 4.5 × 10⁻³ kg·m². During dynamic movement, the shaft can reach a maximum torque of 149 Nm within the SM 50/100 duty profile before returning to continuous operating limits. The holding brake clamps the shaft with 56 Nm when supplied with 24 V DC and draws a nominal current of 1.5 A. Current buildup across the stator follows an electrical time constant of 21.3 ms, indicating how quickly winding current responds to drive commands. The winding releases accumulated heat according to a thermal time constant of 61 min, which is relevant when evaluating repeated operating cycles. The motor’s cooling arrangement must accommodate the heat produced by continuous current and intermittent overload operation.
