Product Description:

The KDA 2.1-100-3-LPS-W1 spindle drive is manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. Designed for machine tools and similar equipment, the unit functions as a power inverter that regulates three-phase spindle currents in response to motion commands. By combining power electronics, sensor interfaces, and dedicated cooling hardware, the drive supports precise speed regulation and real-time torque control for closed-loop industrial automation that requires high rotational accuracy and rapid acceleration.

It draws energy from a regulated bus of 300 VDC, converting that supply into sinusoidal output while sustaining up to 100 A of continuous motor current. A dedicated input line rated at 220 V/50-60 Hz is reserved for the cooling circuit so airflow is maintained during safe-off conditions. Configuration data and status words are exchanged over an RS-232-C maintenance port, while velocity and position setpoints are transmitted through the SERCOS interface integrated on the control board. A second encoder socket is also provided so the unit can accept spindle position feedback or supplementary motor feedback when multi-axis synchronization is required.

Effective temperature management is achieved through a mounted heatsink blower, and the drive relies on forced cooling to keep semiconductor junctions below critical limits during prolonged high-speed machining. Proper operation is specified for ambient temperatures from 5 to 45 °C and for installation sites up to 1000 m above sea level. If those limits are exceeded, derating may be necessary to maintain current capacity and thermal stability. The cooling system supports steady spindle operation during sustained high-load duty, and the power stage remains suitable for applications that require responsive control over changing speed and torque demands.