Product Description:

The KDA 3.2-100-3-LY0-W1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It converts fixed DC-link energy from a machine supply module into a variable three-phase output for high-speed spindles used in CNC machining centers. By regulating torque and speed in real time, the unit can reduce the need for mechanical gear changes and support stable cutting conditions. Closed-loop spindle control also helps maintain commanded speed when cutting load changes suddenly.

It supplies a continuous motor current of 100 A to support large-frame spindles during roughing passes. The internal power section is fed from a 300 VDC intermediate circuit supplied by the machine’s common power module, so the associated bus components must match that voltage level. Thermal energy is removed by a mounted heat sink blower on the top of the housing, and the fan circuit is powered from a dedicated 220 V/50–60 Hz source. The unit uses forced cooling, so the blower runs whenever the power stage is enabled instead of waiting for a temperature threshold.

The drive is intended for ambient temperatures from 5 to 45 °C, which allows installation in typical industrial enclosures when normal airflow is available. It can be mounted at elevations up to 1000 m above sea level before output derating is required. Velocity references are received through the SERCOS interface, allowing real-time exchange of setpoints and status data over the fiber-optic control loop. For applications that require resolver feedback with additional position verification, the front panel includes a second encoder input and synchronous input for dual-channel spindle orientation tasks. This supports orientation and synchronized motion functions when the machine process depends on accurate spindle position.