Product Description:

The KDA 3.2-100-3-AP0-W1 is a spindle drive from the KDA Spindle Drives series produced by Bosch Rexroth Indramat. Classified as series 3, version 2 within the family, it forms the regulated power stage that links numerical control systems to high-speed machine-tool spindles. The unit samples controller references, modulates a three-phase output, and manages regenerative energy so that milling, drilling, or grinding axes maintain commanded speed and torque with minimal overshoot. Its design supports continuous operation in automated production where cycle accuracy and thermal stability are required.

The drive draws energy from a regulated bus of 300 VDC and can supply up to 100 A of armature current, which suits medium-power spindles that accelerate and decelerate repeatedly during tool changes. The heatsink blower that removes switching heat is powered from an auxiliary line of 220 V/50-60 Hz. Because the fan is permanently attached to the rear fin stack, the cooling arrangement uses a mounted heatsink blower. Continuous airflow provides forced cooling, which helps keep semiconductor junctions within safe limits during high-duty cycles. The unit has no additional interface option and relies on standard KDA bus connectors for control-cabinet integration.

For reliable service, the drive must operate in ambient air between 5 to 45 °C. Cabinet placement must also stay within 1000 m above sea level so the blower can maintain its rated airflow density. The setpoint channel is an Analog voltage that the controller filters and scales, allowing tight speed loops without digital conversion latency. A dedicated second encoder input is available for direct spindle feedback or for an auxiliary motor. This arrangement supports applications that use different feedback sources for spindle control and machine synchronization.