Product Description:

The KDA3.2-100-3-A00 spindle drive is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. As a closed-loop power module, it supplies regulated current to high-speed motorized spindles used in machine tools and other metal-cutting equipment. It converts low-level command signals from a CNC controller into controlled armature power for accurate speed and torque regulation. The unit is intended for applications where stable spindle performance is required during cutting, drilling, and similar continuous-duty processes.

It operates from a DC bus of 300 V, which is typically supplied by a shared power unit and sets the available voltage for spindle acceleration. The drive can deliver a rated armature current of 100 A and a continuous output current of 70 A, indicating its overload capacity and sustained operating level. Internal power devices use forced cooling, so an external blower is required to keep semiconductor temperatures within the permitted range during demanding duty cycles. The housing has an IP10 protection rating, which means it has open ventilation paths and should be installed inside a filtered control cabinet. Measurement circuits draw 160 mA from the ±15 V supply for current and voltage monitoring, and the second encoder port is omitted when only a primary feedback channel is needed.

The permitted ambient operating range is 5 to 45 °C, which suits typical factory conditions. Installation is allowed at elevations up to 1000 m, where air-cooling performance remains suitable for normal operation. The unit must be mounted in a vertical orientation so airflow passes correctly across the heat sink. Control electronics require 1.4 A from the +24 V logic supply, leaving room on standard cabinet control power circuits. Because the enclosure is openly ventilated, cabinet layout should provide clean airflow and adequate spacing around the drive.