Product Description:

The KDA 3.2-100-3-LPD-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It converts regulated DC power into variable three-phase output for high-speed machining or grinding spindles, while providing position and velocity data to a CNC or PLC. Within an automation cell, the unit functions as a power amplifier and feedback gateway so the mechanical spindle tracks numeric control commands with tight speed tolerance. This makes it suitable for machine tools that require stable spindle control during acceleration, constant-speed cutting, and commanded orientation.

Its power input stage accepts 300 VDC from the shared supply bus and can deliver a continuous armature current of 100 A, which sets the torque range available to the coupled motor. Thermal management is handled by a mounted heat sink blower that draws air across the aluminum fins; this fan is energized from a dedicated 220 V at 50/60 Hz source, and the overall arrangement uses forced cooling to keep semiconductor junctions below their rated limits during sustained high load. The dedicated airflow path helps the power section maintain stable performance during long duty cycles and rapid load changes. Series rating 3 and version 2 identify the internal control platform used across compatible SERCOS drive families, allowing synchronous communication on a common optical ring.

For field integration, the drive offers a SERCOS interface for real-time speed setpoints and a separate channel that accepts a digital position command value when positional interpolation is handled by an external controller. A second encoder input can route spindle feedback or auxiliary motor signals to close a high-resolution position loop without extra interface boards. This arrangement lets the controller exchange command and feedback data without separate external signal converters. The permissible ambient range of 5 to 45 °C supports installation in typical shop environments, and reliable operation is maintained up to 1000 m above sea level before derating is required.