Product Description:

The KDA 3.2-100-3-DPD-U1 is a closed-loop spindle drive module manufactured by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series, revision 3.2. Within a machine tool or production cell, this drive converts regulated DC bus energy into three-phase power for high-speed spindle motors, providing the speed regulation and feedback handling needed for cutting, grinding, and drilling operations. It is intended for cabinet installation and includes its own cooling assembly, so it can operate as a compact spindle control stage in integrated drive systems. Closed-loop operation lets the drive respond to changing spindle loads without relying on open-loop frequency control.

The drive links to a common DC bus at 300 VDC, and its inverter section is rated for 100 A of continuous output so it can energize large-frame asynchronous or synchronous spindles without derating. The cooling assembly is powered by an auxiliary supply of 115 V/50–60 Hz, which keeps the blower circuit separate from the main power electronics. Thermal limits allow operation in ambient temperatures from 5 to 45 °C, making it suitable for enclosed industrial panels that are not climate controlled. Altitude capability extends up to 1000 m above sea level, and higher elevations require current reduction because lower air density reduces cooling effectiveness.

Heat is removed by a mounted heat sink blower, and this forced cooling arrangement keeps air moving through the fin assembly during sustained spindle loading and deceleration. Command data enter through a digital position command interface, and spindle velocity is adjusted with a digital 16-bit parallel speed command, which helps the drive follow controller setpoints without analog drift. A separate encoder socket accepts a second feedback channel for spindle positioning or auxiliary motor monitoring. The control section uses a series 3, version 2 logic board for operation within the KDA platform.