Product Description:

The KDA 3.2-050-3-DYI-U1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a spindle drive, it converts DC bus energy into regulated three-phase output for high-speed machining spindles. The product is in series 3 and version 2, which keeps it aligned with Indramat modular drive racks used in CNC and transfer lines. It provides closed-loop torque control and accepts digital speed references from the motion controller. This allows the connected spindle motor to react quickly to changing cutting loads during machining and grinding operations.

Electrical input is derived from a DC link rated at 300 VDC, and the power stage can deliver a continuous phase current of 50 A to the spindle motor. This current capacity supports sustained spindle demand during long machining passes. Thermal management relies on a mounted heat sink blower powered from 115 V/50-60 Hz. Air is pulled across the finned heat sink by forced cooling, which helps maintain semiconductor junction temperatures during extended high-load cycles. The velocity reference arrives through a 16-bit parallel digital interface, enabling precise spindle speed commands without analog drift.

For installation, the drive is intended for ambient temperatures from 5 to 45 degrees Celsius and for sites up to 1000 m above sea level without derating. Position feedback flexibility is improved by an auxiliary channel that provides an incremental encoder output to downstream control hardware. A dedicated port also accepts a second encoder input and synchronous input for master-slave spindle coordination. These signal paths support coordinated spindle operation in multiaxis tool heads where accurate phase matching is required. They also allow the control system to distribute speed and position information to related axes without relying only on the main feedback channel.