Product Description:

The KDA 3.2-100-3-AQS-U1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it converts regulated DC bus power into controlled three-phase output for high-speed machine tool spindles, allowing precise torque and speed regulation during milling, drilling, or grinding. The unit’s third-generation hardware, identified by series index 3 and version 2, integrates a heatsink blower and closed-loop current control so it can maintain continuous performance on production lines that demand tight speed tracking and quick acceleration.

The drive handles a rated motor current of 100 A and is supplied from a stabilized DC link of 300 VDC. Thermal energy is removed through a mounted heatsink blower, and airflow is directed across the power module by the drive’s forced cooling channel. The blower is energized from a separate utility feed of 115 V / 50–60 Hz, so cooling can remain active during coast-down or standby. Speed reference data are received as an analog voltage, and internal gain stages translate this command into pulse-width-modulated output for the spindle. Series code 3.2 identifies the drive version within the product line, and the unit is intended for modular multi-axis cabinet installations.

An auxiliary serial interface (RS-232C) permits parameter transfer and fault logging without opening the cabinet, and the analog speed command channel remains available for real-time velocity setpoints. Operation is permitted from 5 to 45 °C, enabling installation in climate-controlled machining halls without additional heaters. The design tolerates mounting heights up to 1000 m above sea level before derating becomes necessary, which suits most factory elevations. This arrangement allows service access without interrupting normal machine operation.