Product Description:

The KDA 3.2-050-3-AQI-W1 spindle drive is produced by Bosch Rexroth Indramat in the KDA Spindle Drives series. Designed to regulate high-speed machining spindles, the unit converts a constant DC link into controlled three-phase output, allowing CNC controllers to command rapid acceleration, deceleration, and stable steady-state rotation. In automated production lines, the drive acts as the link between the motion controller and the motor, providing current, velocity, and position control for metal-cutting and grinding processes. That control approach helps the spindle maintain commanded speed during tool engagement and during rapid speed changes between machining steps.

The power stage operates from a DC bus of 300 VDC, and its output channel can deliver a continuous motor current of 50 A, so connected wiring and inverter sizing must match that load. Internal electronics are cooled by a mounted heat sink blower, and the blower is supplied by an auxiliary line at 220 V, 50/60 Hz. Because airflow moves through the fin passages, the device relies on forced cooling rather than natural convection. These electrical and thermal limits keep the drive within its rated operating range during repeated spindle acceleration and deceleration.

The permitted ambient temperature range is 5 to 45 °C, and installation altitude is limited to 1000 m above sea level so air density remains suitable for heat removal. Feedback is provided through an incremental encoder output, while speed demand is sent through an analog speed reference that is compatible with many legacy CNC controllers. This unit is series 3 and version 2, indicating a later revision within the product line. The signaling arrangement suits systems that use conventional analog speed commands together with encoder-based spindle feedback.