Product Description:

The KDA 3.2-100-3-D0S-W1 spindle drive is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. Designed to regulate high-speed spindles in CNC and other motion platforms, the unit converts a fixed DC bus into controlled three-phase output while coordinating motor feedback through the drive system. Within an automation cabinet, it supplies torque commands that match programmed tool paths, allowing precise metal-cutting or grinding processes to run at the commanded velocity. It is suited for machine tools and grinding systems that need repeatable spindle response during changing load conditions.

Electrical capacity starts with a DC intermediate circuit of 300 VDC; from this bus, the inverter section can deliver a continuous current of 100 A to the spindle motor. Cooling is managed by a mounted heat sink blower fed from an auxiliary line of 220 V at 50–60 Hz, and the airflow is directed across the fins under forced cooling to keep semiconductor junction temperatures within limits during rapid acceleration cycles. The auxiliary blower helps maintain consistent thermal behavior during sustained high-current operation. Control hardware communicates with external equipment through a serial interface (RS-232-C), enabling parameter uploads and diagnostics without opening the enclosure.

The drive maintains full ratings between 5 °C and 45 °C, and altitude is limited to 1000 m above sea level so reduced air density does not impair heat sink performance. Speed reference data arrive on a parallel bus as a digital 16-bit command, allowing fine resolution of spindle rpm steps for contouring routines and other speed-sensitive processes. This command format supports small speed changes when the spindle follows programmed path data or surface-finish requirements. For applications that rely on a dual-feedback loop, the unit has no second encoder input, so secondary position data must go directly to the motion controller instead of the drive. The drive is Series 3 Version 2.