Product Description:

The KDA 3.1-100-3-L0S-W1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. As a spindle drive, it converts direct-current bus power into regulated three-phase output for high-speed machine-tool spindles and similar axes in automated production. This type of drive is used where stable speed control, quick acceleration, and repeatable spindle response are required for cutting and machining processes. In machining centers, it can be used for drilling, milling, and contouring operations where the control system must hold spindle speed through load changes.

The unit operates from a DC bus of 300 VDC and can deliver a continuous output of 100 A, giving it the current capacity needed for rapid acceleration of large spindle masses. Thermal management relies on a mounted heat sink blower, and the fan receives its own supply of 220 V 50–60 Hz, so cooling remains independent of the DC link. Separate blower power allows airflow to continue without depending on motor current demand. Air moves through fin channels by forced cooling to keep semiconductor temperatures within a safe operating range during sustained load conditions. Speed commands enter the drive through the SERCOS interface, allowing deterministic updates from the CNC. For auxiliary diagnostics, an RS-232-C port is also available for local access to drive data and settings.

These electrical and communication features are supported across an ambient range of 5 to 45 °C and at installation altitudes up to 1000 m without derating, matching typical shop-floor conditions. The drive is series 3, which places it within the same product generation as compatible system components. It does not include a second encoder input, so spindle feedback is handled through the primary channel used by the control system. A single feedback path simplifies signal routing in systems that do not require redundant spindle sensing.