Product Description:

The KDA 3.2-100-3-DPS-W1 spindle drive is produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. Designed as a power stage for motorized spindles, it takes rectified DC bus energy from an external supply and modulates it for high-speed machining tasks. The product is Series 3 and Version 2, indicating its place within the KDA line. It is typically used with a spindle motor and a separate supply module in machine tools that require rapid speed changes and stable rotation. In an automation cell, the drive manages spindle acceleration, braking, and steady cutting speed.

Its internal power section is energized by a 300 VDC bus, and the output stage can deliver a continuous 100 A to a connected three-phase spindle motor. Speed reference data reaches the control logic through a 16-bit digital parallel command channel, which provides precise numerical resolution across the operating range. Supervisory systems can also configure and diagnose the unit through a serial RS-232C interface located beside the command port. The blower that cools the IGBT stack draws power from 220 V/50–60 Hz, separating the ventilation supply from the main DC link during sustained high-current operation. This arrangement keeps the command path and auxiliary communication functions separate while the spindle is running.

Thermal management relies on a mounted heat sink blower that operates in forced cooling mode, so clearance around the fin stack must remain unobstructed. The electronics are intended for ambient air from 5 to 45 °C, and derating is not required at elevations up to 1000 m above sea level. Unobstructed airflow is important when the drive is installed near other heat-producing equipment inside a machine cabinet. A secondary encoder socket allows spindle feedback or supplemental motor feedback when tighter control is needed in a machining center. The additional feedback path can support functions such as spindle orientation or synchronized motion with other machine axes.