Product Description:

The KDA 3.2-100-3-A00-U1 is a drive module manufactured by Bosch Rexroth Indramat for its KDA Spindle Drives series. In an automation cell, this unit supplies regulated three-phase power to high-speed motor spindles, letting CNC controllers vary machining speed while the module handles current shaping and fault monitoring. By converting a fixed DC bus into a controlled, pulse-width-modulated output, it maintains spindle torque and velocity so cutting, grinding, or drilling operations stay consistent under changing mechanical loads.

This model draws its logic energy from a heat sink blower circuit rated at 115 V/50-60 Hz, so the cabinet must provide that single-phase source whenever the cooler is active. Internally, the power section is tied to a DC link of 300 VDC, which sets the maximum motor voltage the drive can synthesize. Continuous motor demand is supported by a nominal output of 100 A, which indicates the continuous current the power section can supply without exceeding normal thermal limits in the switching devices and bus bars. Heat generated in the power devices is removed by a mounted heatsink blower. Airflow is intensified through forced cooling to keep semiconductor junctions below their limit during sustained heavy cutting cycles. Because the speed reference is accepted as an analog voltage, interface boards can send a proportional command without digital handshaking.

The module operates in ambient temperatures from 5 to 45 °C, so hotter enclosures may require conditioning. Installation altitude is limited to 1000 m above sea level; above that level, current and switching frequency must be derated. The analog architecture accepts a straightforward analog speed command. It includes no additional interface option and omits a secondary encoder channel, which simplifies wiring but limits feedback expansion to the attached spindle motor.