Product Description:

The KDA 3.1-050-3-DY0-W1 is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. Delivered as a drive module for motorized spindle axes, it converts a regulated DC bus into variable three-phase output so CNC controllers can command speed and torque with precision. The unit is part of level 3 of the series and is intended for machine-tool spindles that require continuous closed-loop velocity control during cutting, drilling, or grinding operations. This operating role suits equipment that must hold stable spindle speed while cutting conditions change throughout a machining cycle.

The power section is energized from a bus link rated at 300 VDC, and its inverter can supply a continuous phase current of 50 A to the connected motor. Cooling is handled by a mounted heat-sink blower; this fan receives its own AC feed of 220 V / 50-60 Hz, helping keep the drive at a controlled operating temperature while the main converter remains isolated from line harmonics. Speed references arrive through a 16-bit parallel digital input, allowing the controller to issue exact setpoints without analog conversion noise. The module has no additional interface option, so its configuration stays focused on spindle control and direct integration with compatible control hardware.

Thermal limits allow operation in ambient conditions from 5 to 45 °C and at elevations up to 1000 m above sea level. The drive uses forced cooling to maintain internal airflow, which supports stable current regulation when cabinet temperatures vary within the permitted range. Position-related signals can be coordinated through the second encoder input and synchronous input, enabling monitoring needed for spindle orientation and synchronized machine functions. Because no additional interface card is installed, wiring remains more direct and the module fits well in retrofit or modular cabinet layouts where available space may be limited.