Product Description:

The KDA 3.3-100-3-DPD-W1 is a spindle drive produced by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. As a spindle-oriented power module, it converts a regulated DC bus into three-phase motor power for high-speed machining spindles and related axes in CNC installations. This type of drive is intended for applications where stable speed control, fast response to load changes, and accurate coordination with machine motion are required during cutting and positioning tasks. The unit is in Series 3 and supports industrial automation tasks that require precise velocity regulation and rapid acceleration under closed-loop feedback.

The power section is energized from a shared DC link at 300 VDC, and its output stage can deliver a continuous current of 100 A to the connected spindle motor. Heat generated by the switching devices is removed by a heat sink-mounted blower that draws its own supply from an auxiliary line rated at 220 V, 50/60 Hz. This forced-air arrangement helps keep internal temperatures within range during sustained high-current operation and supports continuous use in demanding spindle duty. A digital position command interface lets the controller send target data directly, which supports responsive spindle regulation without relying on analog command conversion.

The drive uses forced cooling, so airflow around the fins must remain unobstructed during operation. Installation is permitted up to 1000 m above sea level, and the ambient temperature must remain within 5 to 45 °C. Speed reference data reaches the control electronics through a 16-bit digital parallel speed command port, which allows the higher-level control to provide precise command values in digital form. A second encoder input is also available for phase-synchronous spindle orientation or dual-loop positioning when the application needs added feedback capability.