Product Description:

The DM 15K 3301-D belongs to the DM Servo Drives series produced by Bosch Rexroth Indramat. As a servo drive, it supplies controlled current to synchronous or asynchronous motors, accepts position feedback, and outputs velocity or torque commands that keep an axis aligned with the machine controller. In automated cells, the unit bridges the gap between the higher-level motion processor and the power stage that energizes the motor windings during acceleration, deceleration, and steady-speed operation. This arrangement keeps motion control and power conversion closely coordinated at the axis level.

The incoming feedback is digitized at an actual position resolution of 12 bits, and the unit uses a resolver interface for rotor angle feedback in closed-loop control. When the PWM carrier is set to 4 kHz, the continuous closed-loop current reaches 11 A(rms), while the short-term open-loop limit is 18 A(rms); these limits drop at 8 kHz because the higher switching speed reduces thermal headroom in the output stage. Power dissipated as heat is limited to 121 W, so cabinet airflow must remove that amount to maintain reliable operation. If the ambient temperature rises above 45 °C, current capability falls, and an analog setpoint interface ties the drive to classic motion controllers that output differential voltage commands.

The control electronics draw 0.89 A from the machine's 24 V supply, so fuse sizing for the low-voltage rail must include that steady demand. Installation space is modest because the housing width is only 50 mm, permitting high-density multi-axis lineups on a DIN rail and leaving room for adjacent modules in compact cabinets. With a mass of 6.0 kg, the module remains manageable during installation and service, and that weight contributes thermal mass that slows hot-spot formation. This derating behavior applies through the 45–55 °C ambient range, so load capacity can be estimated consistently in gantry and transfer systems.