Product Description:

The KDA 3.2-050-3-L0I-W1 spindle drive is manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. Serving as the power section of a machine-tool spindle axis, it converts common DC bus energy into a three-phase output whose frequency and amplitude are regulated by the motion controller. In an automated cell, it maintains commanded spindle speed, accelerates the tool quickly, and protects the motor from overload. This arrangement lets the controller vary spindle torque and speed across the machine's operating range without a separate inverter stage.

At its power terminals, the drive delivers up to 50 A of continuous output while operating from a regulated link of 300 VDC. A dedicated AC feed of 220 V/50–60 Hz energizes the cooling fan, so thermal performance is not tied to the DC bus. The fan is mounted directly on the heat sink, forming a heat-sink-mounted blower assembly that uses forced cooling to keep semiconductor junctions within safe limits during prolonged high-speed operation. The blower pushes ambient air across the aluminum fins and discharges it at the cabinet rear, allowing the device to carry rated current without relying on external panel fans. Hardware generation 3, version 2, omits a secondary encoder jack, so only the primary feedback channel is present on the front panel.

The drive maintains its ratings in ambient air from 5 to 45 °C and at altitudes up to 1000 m above sea level. Control electronics provide an incremental encoder output that transfers real-time spindle position data to upstream CNC hardware. This encoder channel supports real-time monitoring during speed changes and spindle orientation tasks. Velocity references enter over a serialized SERCOS interface, which provides deterministic timing for high-speed cutting cycles and removes the need for analog command wiring on the control side.