Product Description:

The KDA 3.2-100-3-L0I-U1 is a spindle drive manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Within an automation cell it acts as the dedicated power stage for a high-speed motor spindle, taking velocity commands from the motion controller and regulating stator current so machining tools reach their programmed cutting speed quickly and remain stable under load.

This unit draws auxiliary blower power from a single-phase source rated at 115V/50-60Hz, while its main DC link requires 300 VDC. The armature path is dimensioned for a continuous output of 100 A, supplying the high peak torque that spindle processes demand. Thermal management is handled through forced cooling; a mounted heatsink blower moves air directly across the fin pack to maintain safe semiconductor junction temperatures. Continuous operation is intended inside machine enclosures where ambient air remains within 5 to 45 °C, preventing thermal derating. By combining blower power, heatsink area, and a 300 V bus, the drive sustains full rated current during long roughing passes without triggering over-temperature faults.

The controller accepts its speed reference over the digital SERCOS Interface, allowing deterministic velocity loops that match servo and spindle axes on a common fiber ring. For auxiliary positioning tasks, an additional channel provides a incremental encoder output; however, a second encoder input is not available, so dual-loop feedback must be handled upstream. Installation sites can reach 1000 m above sea level without reduced current, and environmental sealing is not required beyond the standard cabinet IP rating. Hardware identification shows internal code Series 3, Version 2, aligning it with companion KDA modules that share identical communication timing and regenerative resistor parameters.