Product Description:

The KDA 3.2-050-3-DQI-W1 is a spindle drive manufactured by Bosch Rexroth Indramat and placed within the KDA Spindle Drives series. As a spindle drive, it converts regulated DC power into the controlled three-phase output required to run high-speed machine-tool spindles and other production axes. The model is identified inside the series as version 2 of the third design cycle. Its purpose is to regulate spindle motion so cutting processes can maintain commanded speed under changing load conditions. It serves in automated machining centers where precise speed regulation and fast command response are required.

In normal operation, the drive draws a continuous current of 50 A from a common DC bus that supplies 300 VDC. Spindle velocity is selected through a Digital (16 bit parallel) command word received from the CNC controller, allowing 65,536 discrete speed references without analog drift. Internal losses are removed by a mounted heat sink blower that uses forced cooling, and the blower motor is powered from an auxiliary supply of 220 V/50-60 Hz. This dedicated airflow helps keep semiconductor temperatures within an acceptable operating range while the power stage delivers its rated output. The digital command structure also supports stable speed selection when the drive is used in precision machining applications.

The unit may be installed where ambient air remains within 5 to 45 °C and where site altitude does not exceed 1000 m above sea level. Staying within those limits helps prevent derating of current and cooling capacity. Position feedback wiring can be looped through the drive by means of the incremental encoder output, which simplifies signal distribution to supervisory devices. That passthrough is useful when encoder information must be shared with higher-level monitoring equipment. Within the product family, it is cataloged as Series 3.