Product Description:

The DM 30K 5111-D servo drive is produced by Bosch Rexroth Indramat as part of the DM Servo Drives series. As a closed-loop power stage, the unit supplies regulated three-phase current to synchronous and induction motors used in automated machinery. It interfaces with higher-level motion controllers and converts DC bus energy into pulse-width-modulated output, allowing accurate speed and torque regulation in assembly lines, packaging equipment, and material-handling axes.

The control logic inside the drive draws a nominal auxiliary current of 1.03 A from an external 24 V supply, so cabinet power budgeting must reserve that amount for the electronics, relays, and fans. Its intermediate DC bus is stabilized at 670 VDC, providing the voltage headroom required for high-speed motor operation without saturating the output stage. When the switching frequency is set to 4 kHz, the drive can continuously deliver 5.8 Arms to the motor. Selecting an 8 kHz switching rate lowers the continuous capacity to 3.6 Arms because of increased switching losses. Heat removal relies on air cooling, so unobstructed airflow across the heat sink is necessary. For ambient temperatures above 45 °C, the output must be reduced by 0.35 A per kelvin at 4 kHz or 0.24 A per kelvin at 8 kHz to keep semiconductor junctions within safe limits.

Transient demands are handled by a peak output of 29 Arms at 4 kHz or 22 Arms at 8 kHz, enabling short acceleration bursts or positioning moves without oversizing the drive. The internal losses that appear as heat do not exceed 156 W, so matching the drive with cabinet ventilation helps prevent excessive thermal loading of neighboring components. Mechanical installation is simplified because the aluminum housing weighs only 6.0 kg, allowing direct panel mounting without reinforcement. Motor sizing, fusing, and cable selection should match the drive's current and thermal limits.