Product Description:

The KDA 3.2-100-3-L0S-U1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed for closed-loop speed and torque regulation of high-speed machine tool spindles, it connects directly to a shared DC bus and communicates with CNC or PLC controllers. In automated equipment, it supplies controlled three-phase output to an attached motor while an integrated heat sink and dedicated blower remove thermal losses during continuous duty. It is intended for spindle applications that require stable rotation during drilling, milling, and similar machining processes.

Its power stage is energized from a shared DC link rated at 300 VDC. The drive can deliver a continuous phase output of 100 A, allowing it to accelerate large spindle masses without saturation. A separate auxiliary input of 115 V/50–60 Hz powers the blower, so cooling demand remains isolated from the main power bus. Because the unit operates from a common DC link, it can be used in systems where multiple axes share the same energy source. The cooling assembly uses a mounted heat sink blower, and airflow is provided through forced cooling. These features help keep semiconductor temperatures within acceptable limits during heavy cutting cycles and extended spindle operation.

The unit is rated for ambient temperatures from 5 to 45 °C and for mounting heights up to 1000 m above sea level, and operation outside those limits may require derating. Command values are transmitted over the SERCOS interface, enabling deterministic exchange of setpoints and status with motion controllers during synchronized spindle operation. Diagnostic tasks can be performed through the built-in serial interface (RS-232C), which provides a direct path for local communication. Because the design omits a second encoder input, feedback must be supplied through the primary spindle encoder, which simplifies wiring but limits dual-loop configurations.