Product Description:

Bosch Rexroth Indramat’s KDA 3.1-100-3-D0S-U1 is a spindle drive from the KDA Spindle Drives series used for high-speed machining and turning centers. The unit converts the regulated DC link supplied by an external power supply into synchronized three-phase output for a motorized spindle while supervising speed and torque. By integrating drive control, power electronics, and dedicated cooling hardware, it allows machine controllers to command precise spindle velocities required in automated production lines.

The drive draws a continuous current of 100 A, giving it the headroom to accelerate large spindle masses without exceeding thermal limits. Internally it is supplied from a bus voltage of 300 VDC, so component spacing and insulation are designed for that potential. Cooling is active; the electronics are kept within operating limits by forced cooling, which channels air through the power stack and heat sink. The blower itself receives utility power at 115 V 50/60 Hz, eliminating the need for a separate low-frequency transformer inside the cabinet. The drive receives its target speed through a digital 16-bit parallel command, allowing the CNC control to transmit exact velocity words without analog drift.

Monitoring and diagnostics can be accessed through an RS-232 C serial port, enabling parameter uploads and fault logging from a laptop or HMI without opening the enclosure. Thermal management is supported by the mounted heatsink blower, so the drive may be placed beside other heat-generating modules without requiring extra ductwork. Reliable performance is specified for ambient temperatures from 5 to 45 °C, covering common machine shop environments. Installation elevation is limited to 1000 m; above this altitude, thinner air lowers cooling efficiency and may require current derating.