Product Description:

The QSY090B-020-HG1-UN is a synchronous servo motor manufactured by Bosch Rexroth Indramat within the QSY Synchronous Servo Motors series. It serves as an electromechanical actuator that delivers precise shaft positioning and regulated velocity for automated assembly lines, pick-and-place modules, and other motion-centric machinery. By pairing with a Rexroth drive, the unit supplies feedback-controlled torque so machine axes can accelerate rapidly, decelerate predictably, and maintain commanded positions during steady-state operation.

During nominal operation, the windings accept a phase voltage of 305 V, allowing the drive to output the required energy without step-up transformers. At this voltage, the motor provides a continuous mechanical output of 2.3 kW while spinning at its rated speed of 2000 rpm. The rated phase current is 6.0 A, and the electromagnetic coupling produces a rated shaft torque of 11.0 Nm. When short bursts of acceleration are required, the rotor can deliver up to 43.5 Nm of peak torque before magnetic saturation limits any further increase. The drive must remain within these thermal and magnetic limits to prevent excessive winding temperatures or rotor demagnetization during operation.

The control system can issue momentary currents as high as 30.0 A to reach peak torque during rapid acceleration. The rotor has 4 pole pairs, which establish the electrical frequency required for synchronous operation at a given mechanical speed. If motion stops under load, the motor resists displacement with a stall torque of 13.0 Nm; this corresponds to a stall current of 7.2 A that the inverter must limit to prevent excessive heat. Proper current regulation allows the motor to hold a stationary axis while protecting the windings during loaded pauses. The available transient current also supports rapid directional changes when the connected drive commands the axis to reverse.