Product Description:

The KDA 2.1-100-3-AQD-W1 is a drive module manufactured by Bosch Rexroth Indramat and supplied within the KDA Spindle Drives series. Designed for machine-tool environments, the unit regulates the torque and speed of asynchronous or synchronous spindle motors so that cutting, drilling, or grinding processes follow programmed trajectories with stable power delivery. By converting DC bus power into controlled armature currents, it links the CNC controller to the spindle shaft and forms the interface between numerical commands and actual motion.

This model delivers a continuous output current of 100 A from a shared DC bus and must be connected to a supply that can maintain 300 VDC under load. Internal power dissipation is managed through a heat sink ventilated by an auxiliary fan supplied with 220 V, 50–60 Hz, and this dedicated blower helps keep semiconductor junctions within their limits during long machining cycles. Heat removal relies on forced cooling, so cabinet airflow does not need to carry the entire thermal burden. Motion data enter the drive as an analog reference in the form of a speed command value, allowing proportional velocity control without digital quantization ripple.

The cooling assembly uses a mounted heat sink blower, so replacement or service can be performed from the cabinet rear without disturbing power wiring. For position-oriented tasks such as tapping, a separate line carries a digital position command value, allowing the drive to blend speed and position loops as required by the program. Reliable operation is specified from 5 °C to 45 °C, which matches standard factory ambient conditions when the cabinet is ventilated. Installation is permitted up to 1000 m above sea level; above that altitude, thinner air reduces cooling capacity and the current rating must be derated.