Product Description:

The KDA 3.3-100-3-D00-U1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series and is designed to regulate three-phase spindle motors in CNC machining centers. Working with 300 VDC supply modules from the same product platform, it generates a variable-frequency output and monitors current so the attached motor can accelerate, decelerate, and hold commanded setpoints across its speed range. The unit is assigned to release level 3 of the series, allowing direct cabinet integration alongside compatible supply, feedback, and controller hardware used in automated production lines.

The power section operates from a stabilized bus of 300 VDC and can deliver a continuous output of 100 A to the connected spindle winding. An internal heat sink blower is powered by an auxiliary source rated at 115 V at 50/60 Hz, helping keep semiconductor temperatures within acceptable limits during sustained current flow. Ambient operating conditions are specified from 5 to 45 °C, and full performance is maintained up to 1000 m above sea level without derating. These limits affect cabinet placement, wiring size, and the protective devices used when the drive is installed in multi-axis machining cells.

Thermal stability relies on forced cooling and a dedicated mounted heat sink blower, which direct heat away from the rear panel and reduce enclosure loading. The command interface accepts a 16-bit parallel digital speed word, enabling precise velocity reference transfer from a CNC control without analog drift. Communication expanders are not included, and the unit is supplied with no additional interface option. A second encoder channel is also omitted, which keeps the wiring layout simpler for spindle applications in metal-cutting or wood-routing equipment.