Product Description:

The KDA 2.1-100-3-DP0-U1-115 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It mounts in an Indramat drive cabinet, where it works from a common DC supply to energize high-speed machine-tool spindles. By modulating current and voltage in response to encoder feedback, the unit maintains commanded speed and acceleration so cutting processes remain controlled during automated machining. This operating role makes it suitable for spindle applications that require stable speed regulation during changing load conditions.

This drive is powered from a DC link held at 300 VDC, a level suited to compact cabinet layouts and spindle-duty power conversion. Under that bus, the power section can supply a continuous phase current of 100 A, allowing sizable spindle motors to reach and hold their rated load. Heat generated in the IGBT stack is removed by an integrated mounted heat sink blower, and the unit uses forced cooling to move air across the thermal path and limit derating within the stated ambient range. The blower itself is fed from a separate auxiliary supply of 115 V/50–60 Hz, so cooling performance remains stable even when DC bus conditions change during low-speed machining.

Command signals reach the control section through a 16-bit parallel digital input, giving the drive fine resolution across the usable speed range without analog drift. A dedicated second encoder input can accept spindle or auxiliary motor feedback, and the unit has no additional interface option, which keeps the wiring arrangement straightforward. The drive operates in ambient temperatures from 5 to 45 °C and may be installed up to 1000 m above sea level without current reduction. These limits suit standard indoor industrial installations where spindle control must remain stable throughout normal operating conditions.