Product Description:

The KDA 2.1-150-3-D0D-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Designed for axis groups that require wide speed ranges and high continuous current, the unit translates digital speed references from a CNC or motion controller into three-phase spindle power. Integrated drive electronics and cooling hardware reduce the need for separate cabinet components and help keep the spindle package compact. This arrangement suits machine tools and other industrial automation equipment that require stable spindle control during long operating cycles. The drive uses Version 2 of the hardware platform, which keeps its mechanical layout consistent with earlier KDA modules.

Its power section is fed from a regulated bus at 300 VDC, and the output stage can deliver a continuous phase current of 150 A. Thermal energy from the power devices is removed by a mounted heatsink ventilated through a dedicated blower supplied with 220 V/50–60 Hz mains. The drive uses forced cooling, so full current is available without depending on general enclosure airflow. Speed references enter the drive as a 16-bit parallel digital word, allowing fine resolution across the commanded velocity range. This input method supports accurate spindle speed control during cutting, drilling, and other continuous-duty processes.

For position-synchronized spindle tasks, a separate interface provides a digital position command value, and there is no second encoder input when a single feedback source is sufficient. The heatsink assembly uses a mounted heatsink blower, which keeps air moving across the cooling surfaces. The drive may be installed at elevations up to 1000 m above sea level and will operate in ambient temperatures from 5 to 45 °C without derating. The position command interface supports synchronized spindle functions such as orienting and coordinated motion. The housing follows Series 2 mechanics, so its mounting hole pattern matches other KDA modules.