Product Description:

The KDA 2.1-100-3-APD-W1-220 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. It is a spindle drive designed to regulate motor speed and torque for machine-tool spindles and other precision axes that require tightly controlled acceleration profiles. By converting direct-current link voltage into controlled three-phase output, the unit forms the core of the spindle control loop and coordinates with a higher-level CNC or PLC to maintain commanded velocity and orientation during cutting, drilling, or grinding operations.

The drive operates from a DC bus of 300 VDC and can deliver a continuous phase current of 100 A, giving it the capacity needed for high-power spindle starts and rapid load changes. Thermal energy is removed by a mounted heat sink blower, and airflow is provided by forced cooling to keep semiconductor temperatures within safe limits. The blower itself uses an auxiliary source rated at 220 V/50-60 Hz, so fan power does not need to come from the main control supply. A second encoder input is also available so the drive can read spindle position or an additional motor sensor for functions such as rigid tapping and synchronous handover between axes.

The unit operates in ambient temperatures from 5 to 45 degrees Celsius and at elevations up to 1000 m above sea level without output derating, allowing installation in standard factory halls. Speed references are accepted as analog signals, while position loops can be closed through a digital position command value interface, which gives motion controllers flexibility when speed and position tasks are handled separately. This arrangement supports applications that require coordinated spindle motion during indexed or synchronized machine functions. The series 2 design matches the electrical layout used for this product line.