Product Description:

The KDA 3.2-100-3-D01-W1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. The unit is series 3 and version 2. It converts a fixed DC bus into controlled three-phase power for machine-tool spindles, allowing closed-loop speed regulation in automated milling, drilling, or grinding systems. It is intended for spindle applications that require stable speed control under changing cutting loads.

The built-in heatsink blower operates from an auxiliary source of 220 V / 50-60 Hz, so a separate fan supply is not required. Cooling hardware uses a mounted heatsink blower, and air is drawn directly across the fin stack to remove losses generated by the IGBT bridge. The power section is energized from a shared bus at 300 VDC, matching Indramat supply modules used in multi-axis arrangements. This connection allows the drive to operate on a common DC power structure with other compatible modules. The inverter can deliver a continuous line current of 100 A. Command data arrive through a parallel interface that accepts a digital 16-bit value, which supports fine speed increments without analog drift.

The unit operates across an ambient range of 5 to 45 °C, allowing use in temperature-controlled industrial spaces. Its airflow path uses forced cooling, so thermal performance remains stable when multiple drives are stacked in a narrow enclosure. Mounting is permitted up to 1000 m above sea level; operation above that height requires derating because of lower air density. Feedback is limited to the primary spindle encoder, and the control board does not include an additional encoder input. This arrangement keeps the feedback interface straightforward for applications that use only one spindle encoder. The ambient limit and altitude limit should both be observed so the cooling path can remove heat as intended.