Product Description:

The DM 45K 7301-D is a servo drive module produced by Bosch Rexroth Indramat within the DM Servo Drives series. Designed for closed-loop control of synchronous and induction motors, the unit regulates phase current and speed in automated tooling, material-handling systems, and general motion platforms. It converts control commands into regulated motor output for positioning tasks and speed-controlled machine axes where stable response is required during changing load conditions.

With compact mechanics, the module occupies only 75 mm of panel width, which helps when several axes must be installed side by side in a limited cabinet. During open-loop acceleration at 4 kHz, the current limit reaches 47.5 A rms, while the closed-loop ceiling at the same switching frequency is 35.5 A rms; these values support short bursts of torque without overloading the power stage. For continuous operation at 4 kHz, the rated current is 23.5 A rms, balancing thermal load with the conductor capacity of the drive stage. Peak conduction losses are limited to 205 W, which helps determine heat sink sizing and cabinet airflow. Communication of target values is handled through the CANrho setpoint interface, and feedback is accepted through a resolver interface for position control without a separate encoder module.

The drive uses a dedicated 24 V control supply of 1.4 A, keeping logic power separate from the main DC bus. At an 8 kHz carrier, its open-loop current ceiling is 35 A rms, and the closed-loop rating falls to 16.5 A rms for continuous duty. Thermal derating is 0.6 A/K at 4 kHz and 0.5 A/K at 8 kHz, so current capability drops as heat sink temperature rises. Positional data is converted to 12 bits by the resolver converter, which is suitable for medium-accuracy indexing and general axis control. The assembly weighs 6.7 kg, allowing installation on standard DIN rails or backplates without extra structural support.