Product Description:

The KDA 3.2-050-3-DPS-W1 is a spindle drive manufactured by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. Within a machining center or grinding line, this unit supplies regulated three-phase power to a motorized spindle so that cutting speed follows programmed setpoints. The 3.2 code indicates Series 3 and Version 2, matching the drive to later control functions and diagnostics used across the family.

The power stage is designed for a continuous output of 50 A, giving it the current margin needed for rapid spindle acceleration. It draws its intermediate circuit from a rectified bus rated at 300 VDC, so compatible supply modules must furnish that link voltage. Thermal energy from the IGBT stack is removed by a mounted heat sink blower, and the blower operates from an auxiliary line of 220 V/50–60 Hz. A dedicated channel accepts a digital speed command word transferred in 16-bit parallel form, allowing the CNC to issue precise RPM references without analog drift. Internally, the drive uses forced-air ducts to pass airflow through the fin array before discharging it into the cabinet plenum.

Operation is limited to ambient temperatures from 5 °C to 45 °C and to installation sites no higher than 1000 m above sea level, helping keep semiconductor junction temperatures within the allowed range. Control wiring includes a serial maintenance port that follows the RS-232C standard for parameter upload or alarm retrieval. A second encoder input lets the drive process either spindle feedback or an auxiliary motor encoder at the same time, which supports handoff between machining and positioning tasks without separate drives. The overall heat rejection method is classified as forced cooling, so continuous operation depends on unobstructed airflow through the blower channel.