Product Description:

The KDS 1.3-050-300-W1 is a servo-drive module manufactured by Bosch Rexroth Indramat for the KDS Servo Drive Modules series. It serves as the power section in multi-axis drive systems, where it supports a shared DC bus for connected servo converters. In machining lines and material-handling equipment, the module helps keep bus energy stable so the inverters can regulate motor torque and speed with consistent current delivery. It also absorbs regenerated energy from decelerating axes, which helps limit unwanted voltage fluctuation on the common DC network and supports smoother operation when several axes accelerate and brake in close sequence.

The module provides a continuous bus current of 50 A, which suits drive groups that require a moderate level of shared DC-bus capacity. Its power stage operates from a DC link of 300 V, and the design tolerates input variation of ±15% without derating. Under full load, it can transfer up to 15 kW to the shared bus that feeds the servo converters. This electrical arrangement allows the supply section to support multiple connected axes while keeping the common energy path stable during changing speed commands and repeated acceleration cycles.

Cooling is provided by forced ventilation, with air directed through vertical heat-sink channels to remove switching losses from the power electronics. An external fan cassette identified as LE4 mounts on the top plate and supplies the airflow required by the module during continuous operation. The unit weighs 14.4 kg, so the mounting structure must support the installed mass securely without placing unnecessary stress on the enclosure. Cabinet depth and inlet clearance should remain open so the cooling path is not restricted, since blocked airflow can reduce heat removal and raise internal operating temperature.