Product Description:

The SE-B3.033.060-04.000 is a synchronous servo motor produced by Bosch Rexroth Indramat as part of the SE Synchronous Servo Motors series. It is intended for closed-loop industrial axes where compact rotary actuation and integrated feedback are required. A 24 V DC brake circuit provides static holding when the axis is stopped. With the brake installed, the assembly weighs 8.8 kg, and the overall length is 263 mm from the flange to the back cover. A 19 mm shaft diameter with a 40 mm keyed extension allows direct coupling to gear stages or timing pulleys, while an internal tachogenerator supplies 1.8 V per 1000 rpm to the drive controller.

During continuous operation, the motor runs at a nominal speed of 6000 rpm, supporting high axis throughput. Its base torque rating is 4.2 Nm, which is the load it can support when the rotor is energized but stationary. For every ampere of phase current, the electromagnetic system delivers 1.02 Nm/A, and the drive uses this torque constant for current-loop scaling. At standstill, the stator draws 7.7 A, which reflects the thermal load on the windings and power electronics. Dynamic response includes an electrical time constant of 7.6 ms, allowing fast current rise and tight torque regulation during index moves.

The servo's peak capability reaches 9.2 Nm, giving headroom for short acceleration bursts before steady-state limits apply. Heat diffusion through the laminated core is modeled by a thermal time constant of 19 min, so brief overloads can be absorbed without quickly driving the winding temperature upward. Magnetic energy storage is set by a winding inductance of 60 mH, which shapes current ripple under PWM switching, while a winding resistance of 7.9 Ohm sets copper losses at rated conditions. The motor also has a voltage constant of 112 V per 1000 rpm, which the matching inverter uses when setting DC-bus and transistor operating ranges.