Product Description:

The KDA 3.3-150-3-A00-W1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. As a spindle drive, it converts regulated DC bus power into three-phase output for high-speed machining spindles and coordinates torque, acceleration, and braking through feedback from the motor’s primary encoder. In automated machine tools, this drive forms the axis dedicated to material removal, letting the numerical controller vary spindle speed while keeping operation stable within its thermal and electrical limits.

The power stage is supplied from a DC bus held at 300 VDC, giving the internal inverter enough headroom for rapid vector control. Continuous output capability reaches 150 A, so the drive can run large-frame induction or synchronous spindles during heavy cuts. Thermal energy is removed by a mounted heat sink blower; air is pushed directly across the fins, and the enclosure uses forced cooling to keep semiconductor junctions below their intended operating temperature in enclosed cabinets. The blower motor takes its single-phase supply from 220 V/50–60 Hz, allowing straightforward connection to auxiliary power in most plants. Control electronics include a standard analog velocity input, but the housing omits optional fieldbus and second-encoder boards when only basic spindle feedback is needed.

The unit operates within an ambient range of 5 to 45 °C; outside this range, component stress or condensation may occur. Installation is limited to 1000 m above sea level so cooling air density and insulation behavior remain consistent. Speed reference comes from an analog ±10 V signal, aligning the drive with legacy CNC controllers that regulate spindle speed through voltage scaling. The unit is Series 3, indicating its product generation. With no additional interface option and no secondary encoder port, the model is intended for dedicated spindle axes in milling, turning, or grinding centers.