Product Description:

The KDA 3.2-050-3-D00-U1 spindle drive is built by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It operates as the power stage between a common DC bus and the high-speed motors that cut, grind, or drill in automated machine tools. It is intended for spindle service in multi-axis equipment where stable output is needed during repeated speed changes. Its role is to convert DC-bus energy into the regulated motor current required for precise spindle motion. Within an Indramat multi-axis rack, the unit’s Series 3, Version 2 design supplies controlled three-phase output and monitors internal temperature so the drive can maintain spindle accuracy during continuous industrial duty cycles.

The power section is rated for a continuous output of 50 A, allowing it to handle rapid acceleration demands from large-diameter spindles. It draws its bus energy from a regulated source of 300 VDC, so the system must provide a matching DC supply. Thermal management is handled by a mounted heat sink blower that removes heat directly from the IGBT stack. This blower is energized by a separate 115 V/50–60 Hz single-phase line and drives air across the fins in a forced cooling mode, helping the drive sustain output during heavy spindle loading.

The operating range supports ambient temperatures from 5 to 45 °C and installation sites up to 1000 m above sea level. Speed references are accepted as a digital 16-bit parallel word, giving numerical resolution aligned with modern CNC controllers. Expansion slots remain empty because the unit ships with no additional interface option, and the second-encoder port is omitted so standard I/O stays concentrated on the system backplane. Because the additional option slot is unused, the base configuration remains focused on the standard command path and backplane connections. This layout keeps the control connection scheme straightforward in a multi-axis rack.