Product Description:

The KDA 2.1-100-3-DPS-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. In an automation cell, it functions as the dedicated power and control stage for high-speed machining spindles, converting regulated DC link energy from the cabinet supply into three-phase motor current. Velocity setpoints arrive on a Digital 16-bit parallel channel, giving the controller fine resolution across the full speed range while supporting accurate spindle speed control. This arrangement suits machine tools such as milling, turning, and grinding equipment where commanded speed changes must be applied quickly and repeatably.

This unit operates from a DC link of 300 VDC and can deliver a continuous motor phase current of 100 A, allowing it to energize large-frame spindle motors without external boosters. The available current supports sustained spindle loading during cutting cycles while keeping the power stage within its intended operating range. Thermal loads are removed by an auxiliary fan supplied from 220 / 50-60 Hz, so blower power remains independent of the main DC bus. The drive uses forced cooling, which helps remove internal losses even when spindle speed is low and natural convection is insufficient. Hardware generation 2 identifies the internal logic platform and gate-drive circuitry used in this model.

For feedback and diagnostics, the drive provides a second encoder input, enabling simultaneous spindle position tracking or connection of a secondary motor encoder when the axis runs in tandem. A serial interface (RS 232 C) is present for parameter upload and fault monitoring from a host PC. Reliable operation is specified between 5 to 45 °C, and installation is approved up to 1000 m above sea level. Reduced air density above that elevation can lower heat sink performance, so additional derating or external cooling may be required.