Product Description:

The KDA 2.1-100-3-DQD-W1 is a spindle drive module produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Intended for CNC machining centers and automated production lines, the drive supplies a regulated three-phase output to the attached motor while monitoring feedback through digital channels. In an automation cell, it closes the torque loop for the spindle axis, maintaining commanded cutting speeds and allowing the motion controller to synchronize spindle rotation with tool paths and part-handling operations.

Internally, the power stage is energized from a 300 VDC bus, and its output components are rated for a continuous phase current of 100 A, so the module can drive large-frame spindle motors without derating. Speed references arrive over a 16-bit parallel data path, giving the controller 65,536 discrete velocity points and avoiding analog drift. A dedicated channel accepts a position command value in digital form so the same hardware can perform spindle-orient routines or rigid tapping cycles. Thermal energy generated by the IGBTs is removed by a blower that operates from a separate 220 V/50-60 Hz single-phase source, so the cooling system does not draw power from the common DC link.

Stable operation depends on surrounding conditions, so the drive is intended for ambient air between 5 to 45 °C and installation heights up to 1000 m above sea level. Operation within that range supports stable electrical and thermal performance during normal machine use. The blower is bolted directly to the rear heatsink, forming a heatsink-mounted blower assembly that channels air through the fin pack instead of the cabinet volume. This arrangement uses forced cooling, helping keep semiconductor junction temperatures under control during rapid accelerations and sustained high-torque machining passes.