Product Description:

The KDA 3.2-150-3-AQ0-W1 is a spindle drive manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. As a regulated power stage, it converts a fixed DC link into controlled three-phase output so that machine-tool spindles can accelerate, hold a commanded speed, or brake under closed-loop CNC control. This arrangement supports speed regulation during cutting, drilling, and other processes where the spindle must respond smoothly to changing load. The unit occupies the 3 performance class and the 2 version level within the series, giving machine builders a standardized footprint and consistent parameter structure for multi-axis installations.

The drive is rated for a continuous output of 150 A, which helps determine conductor sizing and protective hardware on the DC bus. Its internal electronics are supplied from 300 VDC, allowing direct connection to compatible Rexroth power supplies without additional conversion stages. Heat is removed by forced cooling; the blower runs from an auxiliary supply of 220 V, 50–60 Hz, so airflow does not depend on spindle load. Because the cooling circuit is separate from the power stage, airflow remains available during rapid load changes. Speed reference signals enter the control card as an analog voltage, making the unit compatible with controllers that use ±10 V velocity commands.

Operation is permitted between 5 to 45 °C, and current derating or cabinet conditioning may be required outside that range. Installation altitude is limited to 1000 m above sea level so cooling air density remains within the intended range. The cooling assembly uses a mounted heat sink blower, so no external ductwork is required when the cabinet provides adequate rear clearance. The unit is supplied with no additional interface option, so communication expansion is not included.