Product Description:

The KDA 3.2-150-3-A00-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. The unit converts a fixed DC bus into controlled three-phase output for high-speed motorized spindles used on machine tools and similar automation equipment. In a multi-axis cabinet, it regulates spindle speed and torque for cutting and grinding processes while coordinating with the rest of the drive system. This arrangement supports accurate surface-speed control during machining and helps maintain spindle response when load changes occur at the tool. A built-in heat sink blower removes heat generated during sustained operation so the power section can remain stable during repeated duty cycles.

To power its cooling fan, the drive supplies an auxiliary AC source rated at 220 V/50–60 Hz. This lets the blower operate independently of the DC bus so airflow is maintained whenever the cabinet is energized. The primary heat sink uses a mounted heat sink blower, and forced cooling helps prevent thermal derating under heavy spindle acceleration and continuous load. The power section draws energy from a regulated link of 300 VDC. Under continuous operation, the inverter can deliver 150 A of phase current for large-diameter spindle motors.

The permitted ambient operating range is 5 to 45 °C, so enclosure conditioning is only needed when the surrounding air becomes warmer. Installation is permitted up to 1000 m above sea level without current reduction, which covers most industrial locations. Speed reference data enter the controller as an analog voltage, which simplifies retrofits that already use proportional command signals from existing machine controls. The unit is supplied with no additional interface option, and the second encoder socket is omitted. Standard feedback is still handled through the primary connector, and the drive is Series 3 and Version 2.