Product Description:

The KDA 3.1-100-3-A0I-W1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. This spindle drive is used in industrial automation to power and control machine-tool spindles, translating motion commands from a CNC controller into regulated three-phase power for the motor. It is suited to applications that need stable speed regulation during cutting, drilling, milling, and other continuous spindle processes. The unit is intended for cabinets where the spindle axis must respond quickly to command changes while maintaining smooth rotation. Series designation 3 identifies the product generation, and the integrated control electronics process speed feedback while managing the attached cooling hardware for continuous duty.

The drive connects to a DC bus at 300 VDC and can deliver a continuous phase current of 100 A, matching the requirements of medium-to-large spindle motors in sustained machining service. An auxiliary supply of 220 V/50-60 Hz powers the heat sink blower, helping maintain stable thermal conditions during high-current operation. Internal logic controls fan operation under forced cooling mode so heat is removed regardless of spindle load. Safe operation is permitted within an ambient range of 5 to 45 °C, and the speed loop accepts an analog command value for closed-loop control. Current limiting is monitored inside the drive so overload conditions can be controlled without interrupting normal spindle regulation.

Mechanical installation is permitted up to 1000 m above sea level without output reduction, supporting use at many plant elevations where cabinet cooling remains within the stated range. The cooling hardware uses a mounted heat sink blower attached directly to the rear panel, which simplifies airflow routing in crowded cabinets and keeps the cooling path close to the power section. Speed references arrive through an analog input channel, and position feedback can be retransmitted through an incremental encoder output to external control systems. That retransmitted signal can be used by supervisory control hardware that needs spindle speed or position information. A second encoder socket is not provided, so multi-encoder applications must be handled by upstream equipment or separate interface hardware.