Product Description:

The KDA 3.2-150-3-A0I-W0 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed for machining centers and other automated equipment, it converts DC bus energy into controlled three-phase power for high-speed motor spindles. By combining speed reference processing, current regulation, and heatsink cooling hardware in one housing, the unit serves as the control layer between the machine control and the spindle. This arrangement allows precise acceleration, deceleration, and torque modulation during drilling, milling, and other cutting operations where spindle speed must remain stable under changing load.

A continuous output of 150 A is available for the spindle phases, and the internal power section operates from a bus stabilized at 300 VDC. Thermal energy generated at this load is removed through forced cooling, and a dedicated blower mounted on the heatsink runs from an auxiliary supply of 220 V/50–60 Hz. The control electronics remain functional at ambient temperatures from 5 to 45 °C, so the surrounding cabinet must stay within that range during operation. This cooling arrangement supports steady performance during long machining cycles and helps the power section remain within its intended operating limits.

Installation is allowed up to 1000 m altitude before derating is required. For position tracking, the front panel provides a buffered spindle position through an incremental encoder output, and no second encoder input is included. The single-feedback layout keeps the interface simple for systems that do not need an additional encoder channel, while the buffered signal can be passed to external control hardware without heavily loading the feedback path. Speed commands enter the summing stage as an analog voltage or current reference, which matches many legacy CNC controllers. The drive is part of Series 3 and uses version 2 circuitry.