Product Description:

The KDA 3.1-100-3-DY0-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Designed for panel-mounted machine tool spindles, the unit converts fixed DC bus energy into precisely regulated three-phase output for speed and torque control. By accepting digital speed commands from the motion controller, it serves as the regulating element between the CNC system and the asynchronous or synchronous motor used in milling, drilling, and similar automation tasks. It is intended for industrial automation systems that require repeatable spindle performance over a broad speed range.

For its power stage, the drive operates from a DC bus of 300 VDC, which supplies the inverter section with enough headroom to generate high spindle frequencies. The drive has a continuous output current rating of 100 A, allowing sustained operation without derating. A dedicated heat sink blower is wired to 220 V/50-60 Hz, so airflow is maintained whenever the electronics are active. Environmental limits permit operation between 5 to 45 °C, which helps determine cabinet climate conditions. Installation is permitted up to 1000 m above sea level. The control card is supplied without an additional interface option, which reduces unused connectors and simplifies wiring to the master controller.

A mounted heat sink blower forces air directly across the power modules, and forced cooling helps limit internal temperature rise during sustained duty. Speed reference data reach the drive through a 16-bit parallel digital input, providing fine resolution over the commanded speed range. This format supports accurate transfer of commanded values from the higher-level control without relying on analog scaling. For feedback verification, the unit includes a second encoder input and a synchronous input so the spindle encoder signal can be compared with an auxiliary sensor during operation. The drive is in series 3, which identifies its product generation within the KDA range.