Product Description:

The KDA 3.2-100-300-A00-U1-220 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It regulates the speed and torque of high-frequency motor spindles used in CNC machining lines, lathes, and grinding stations. By interfacing with an external supply module on the DC bus, the drive converts controller setpoints into controlled three-phase output, allowing precise acceleration and deceleration profiles that help protect tooling and maintain surface finish quality. The unit serves as the power-control stage between the machine control and the spindle motor, so commanded speed changes can be followed with stable and repeatable response during cutting operations.

The drive connects to a common intermediate circuit operating at 300 VDC, and its power stage is rated for a continuous output of 100 A so large-frame spindle motors can be driven without saturating the inverter. Internal heat sinks and a high-velocity blower provide forced cooling, which helps maintain semiconductor temperature during sustained roughing cuts and other extended load conditions. The unit is intended for ambient conditions from 5 to 45 °C, and installation is permitted at elevations up to 1000 m above sea level before derating is required. These operating limits support stable performance when the drive is installed in enclosed machine cabinets with appropriate airflow.

Within the KDA Spindle Drives platform, the module is part of Series 3, and the logic board is Version 2. These identifiers indicate the product generation and control revision used in the unit. Resolver evaluation in the control section supports accurate spindle feedback during changing load conditions and rapid speed transitions. The module layout also matches the associated backplane arrangement used in the system, so it fits the intended drive assembly without special adaptation.