Product Description:

The KDA 3.2-100-3-LQI-U1 is produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. Built for integration in multi-axis machining centers, the unit channels controlled power to high-speed spindle motors so that CNC systems can maintain stable cutting speeds, quick acceleration, and repeatable tool positioning during automated production. It operates downstream of a regulated DC bus supply and communicates with motion controllers over fiber-optic links. In this role, it supplies the fast current response needed when spindle speed must be corrected as cutting load changes. This layout supports coordinated spindle control in modular drive racks used on machine tools and other automated processing equipment.

As a dedicated spindle drive, the module draws intermediate-circuit energy from a 300 VDC bus and can deliver up to 100 A of continuous output current to a three-phase motor. Internal thermal management relies on a heat sink equipped with a 115 V 50–60 Hz blower, and airflow is provided by forced cooling during operation. The drive accepts speed references through the SERCOS interface, allowing deterministic communication with the machine control during speed regulation and load changes. The cooling fan is mounted directly on the heat sink, so no external ducting is required and cabinet integration stays straightforward. That combination supports stable spindle operation during milling, drilling, and other high-speed machining processes.

Diagnostic and feedback wiring is simplified by the built-in incremental encoder output, which provides real-time spindle speed verification to higher-level controllers without extra transducers. The electronics remain stable at ambient temperatures from 5 to 45 °C and at installation heights up to 1000 m above sea level, which suits standard indoor factory conditions. The encoder signal also supports monitoring functions within the control system during operation. The unit is hardware release level 3 and series version 2.