Product Description:

The KDA 3.1-050-3-LQS-W1 is a spindle drive manufactured by Bosch Rexroth Indramat and delivered within the KDA Spindle Drives series. It is engineered to regulate high-speed machine-tool spindles in automated production lines where stable velocity control is required for cutting, drilling, and grinding processes. The unit converts regulated DC bus energy into controlled three-phase power so that spindle heads can follow programmed speed profiles with consistent response during operation.

The drive draws energy from a DC bus whose nominal level is 300 VDC, and it can continuously supply up to 50 A of phase current to the spindle motor. A dedicated heat sink blower is powered from an auxiliary line rated at 220 V/50/60 Hz, which keeps the cooling fan independent of the main power section. Thermal management is handled by a mounted heat sink blower that forces air directly across the aluminum fins. The housing is designed for forced cooling, so cabinet airflow restrictions must be considered during installation. Commanded speed comes over a fiber-optic ring using the SERCOS protocol, and the internal control interprets the transmitted reference electronically.

The drive is intended for ambient temperatures from 5 to 45 °C, and reliable operation is maintained up to 1000 m above sea level without derating. Parameter tuning, status messages, and diagnostics can be accessed through a serial interface (RS-232C) on the front panel, allowing local service laptops to communicate without affecting the fieldbus loop. For motion control networks, the drive accepts digital speed command values, enabling synchronized spindle positioning with axes that share the same fiber ring. Design designation 3 within the part code indicates compatibility with third-generation Indramat power sections and matching supply modules that provide the required link voltage and protective functions for spindle operation.