Product Description:

Bosch Rexroth Indramat's KDA 1.1-100-3-A00-W1/220 is a spindle drive from the KDA Spindle Drives series. Installed between the incoming DC bus and the machine spindle, it interprets controller commands to regulate speed and torque for high-precision milling, drilling, and grinding operations. The module forms part of a multi-axis rack, allowing dedicated spindle control alongside feed axes in automated production cells. This arrangement lets the spindle channel remain separate from axis drives that handle table motion and tool positioning.

The drive connects to a bus voltage of 300 VDC, which supplies the energy storage link that feeds its three-phase output bridge. Its power stage is designed for a continuous line current of 100 A, so it can handle rapid spindle acceleration without saturation. Heat is removed by a mounted heatsink blower that draws ambient air across the insulated-gate bipolar transistors. This auxiliary fan is energized from a 220 V/50-60 Hz single-phase source commonly available inside electrical cabinets. Because airflow is directed along the fins rather than relying on enclosure convection, the assembly uses forced cooling for sustained operation during heavy machining cycles.

Operating limits cover the installation environment and signal interface. The unit is rated for ambient temperatures from 5 to 45 °C, and installation altitude is permitted up to 1000 m before derating is required. Speed reference reaches the controller through an analog channel, which supports integration with legacy numerical controls that modulate voltage rather than using fieldbus communication. Expansion hardware is minimized because there is no additional interface option, and the drive also lacks a second encoder connector, so position feedback is expected from the primary spindle transducer. That layout assumes a single primary feedback path for spindle monitoring during operation.