Product Description:

The KDA 3.1-100-3-L0D-W1 is a spindle drive module manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. It supplies three-phase power to high-speed spindle motors. It also interprets numerical control commands to regulate acceleration, speed, and braking during machining cycles in industrial automation. This lets the module serve as the power and control stage between the machine control and the spindle motor in applications that need stable speed behavior during cutting and deceleration.

This drive operates from a DC bus of 300 VDC and can furnish a continuous output of 100 A to the connected spindle motor, giving the motion system a broad torque reserve. Thermal management relies on a mounted heat sink blower that is powered from a separate 220 V at 50/60 Hz line, so cabinet airflow does not have to cool the power electronics directly. Because the blower is attached to a dedicated heat sink, the cooling path is concentrated at the semiconductors that generate the most heat. The assembly uses forced cooling to keep semiconductor temperatures below their rated limits. The unit is Series 3 and communicates its velocity target through the SERCOS interface, allowing synchronous updates with other axis drives on the same fiber-optic ring.

The permitted ambient range is 5 to 45 °C, which suits typical factory installations without supplemental chillers. The unit may be installed up to 1000 m above sea level before output derating applies. Command flexibility is improved by a digital position command input, which lets an external motion controller pass precise positional data to the spindle. The spindle section omits a secondary encoder channel, so that connection can be reserved for other feedback functions elsewhere in the machine. This layout is useful where the control system separates spindle speed regulation from higher-level position handling.