Product Description:

The KDA 3.2-050-3-D0S-W1 is a regulated power module produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. As a spindle drive, it converts a direct-current bus into three-phase motor power while supervising feedback from machine tool spindles in automated machining centers. The unit is part of series 3 and version 2 of this product family, which makes it compatible with matching power supplies and diagnostic software from the same generation. In machine tools, it supplies controlled electrical output so spindle speed remains stable during load changes and rapid transitions between process steps.

It operates from a DC bus of 300 VDC, and the power section can provide a continuous motor phase current of 50 A. Internal thermal management relies on a heatsink blower powered by an auxiliary line of 220 V/50–60 Hz, and airflow is directed through fin channels in a strictly forced cooling mode, so heat is removed continuously during sustained spindle operation. Velocity references arrive at the control electronics as a 16-bit parallel digital word, which enables precise speed resolution without analog drift in commanded spindle speed. The drive maintains stable performance at ambient temperatures from 5 to 45 °C.

The housing and fan assembly tolerate mounting elevations up to 1000 m above sea level before derating is required. Communication with supervisory controllers is available through a serial RS-232C interface for parameter upload and error logging, and this link provides access to operating data without extra analog signal wiring. The integrated mounted heatsink blower keeps device temperature below alarm thresholds and eliminates the need for cabinet air exchangers. Because the model does not feature a second encoder input, position feedback must be routed exclusively through the primary spindle sensor.