Product Description:

The KDA 3.1-100-3-A00-W1 is a spindle drive developed by Bosch Rexroth Indramat for the KDA Spindle Drives series. Within a machine tool or production cell, it controls the speed and torque of high-speed spindles, receiving a setpoint from the machine controller while regulating the three-phase motor connected to its output. By housing the power section, control electronics, and an integrated blower in one unit, the product simplifies cabinet layout for metal-cutting, grinding, or woodworking systems that demand precise spindle regulation. The control section also helps maintain steady spindle behavior during changing load conditions in continuous production.

The power section is designed for a continuous output of 100 A, allowing it to drive large-frame spindle motors without derating. A DC link voltage of 300 VDC feeds the inverter stage, matching the standard supply modules used throughout the KDA family. Thermal stability is maintained by a mounted heat sink blower that pulls ambient air directly across the aluminum fins. That blower is energized from an auxiliary source rated at 220 V/50–60 Hz, so it runs independently of the DC bus status. Heat is removed more effectively because the drive employs forced cooling, which helps keep internal components within their operating range during long duty cycles and rapid accelerations.

Environmental limits support reliable installation in rooms kept at 5 to 45 °C; outside this band, the internal temperature monitoring may trigger a shutdown. The unit can be mounted at elevations up to 1000 m above sea level without output reduction, which covers most plant locations. Speed reference data arrive as an analog voltage, allowing legacy CNC controllers to interface without extra fieldbus hardware. Expansion is intentionally limited because the drive ships with no additional interface option and omits a secondary encoder input, so the hardware remains focused on core spindle control rather than optional feedback or communication channels.