Product Description:

The KDA 3.2-150-3-AYI-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series and is version 2 of the third design release. In machining centers and grinding systems, this drive converts constant DC bus power into regulated three-phase output for high-speed spindle motors. That allows speed and torque control to follow programmable setpoints from the machine controller. Its role is to keep spindle behavior stable during changing cutting loads and speed commands in automated machine tools.

The drive is supplied from a common DC bus at 300 VDC, and its power electronics are rated for a continuous output of 150 A. These ratings describe the electrical supply and continuous current capacity of the unit while the devices on the DC link remain within thermal limits during normal operation. A mounted heatsink blower supports the unit’s forced cooling mode, and this blower is energized from an auxiliary source of 220 V 50–60 Hz. The airflow passes across the heatsink surfaces so the switching components can release heat during sustained spindle duty. When installed in cabinets kept between 5 to 45 °C, internal temperature sensors help keep semiconductor junction temperatures within their permitted range.

Signal handling is expanded by an incremental encoder output that retransmits spindle position data to external automation devices. The drive also provides a second encoder input with a synchronous capture channel for high-resolution feedback loops, which supports applications that require closely timed position information. Speed reference values arrive as an analog voltage, allowing direct compatibility with conventional CNC control cards. Installation is permitted up to 1000 m above sea level without current derating. The forced-air cooling hardware is integrated into the heatsink extrusion, so no separate ductwork is needed and cabinet layout stays straightforward.