KDA 3.1-050-3-LPD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-LPD-W1 is a spindle drive from the KDA Spindle Drives series with a rated current of 50 Amps and a DC supply voltage of 300 VDC. It features forced cooling with a mounted heatsink blower and operates in ambient temperatures from 5 to 45 degrees Celsius. This drive includes a SERCOS speed command interface and a second encoder input for spindle or additional motor feedback.
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Product Description:
The KDA 3.1-050-3-LPD-W1 is a spindle drive from Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. This electronic module controls the rotational speed and orientation of machine-tool spindles by converting a regulated DC supply into three-phase current under closed-loop feedback. In automated milling, drilling, or grinding equipment, it provides the velocity profile and angular positioning required by the cutting process. Closed-loop control helps the spindle maintain commanded speed during cutting and reach repeatable angular positions when the process requires orientation. The 3.x hardware revision adds extended diagnostics so overloads or communication faults can be detected early.
Internally, its power electronics operate from a stabilized bus of 300 VDC, matching standard Rexroth supply modules. Under continuous duty, the amplifier can deliver 50 A of phase current, which suits medium-frame spindles that require high acceleration torque. To keep module temperatures stable, a heat sink-mounted blower directs airflow through the fin stack, and this blower is supplied by a separate 220 V, 50/60 Hz line to avoid loading the DC link. The overall thermal strategy relies on forced cooling, so enclosure convection alone is not sufficient. High-resolution speed references are transmitted over the SERCOS interface, enabling deterministic data exchange between the numerical control and the internal regulator.
The converter maintains all ratings within 5 to 45 °C, which aligns with typical factory ambient conditions. Installation heights can reach 1000 m above sea level before reduced air density must be considered for cooling performance. A secondary encoder input supports either spindle feedback or additional motor transducers. A digital position command value channel is also available for auxiliary control systems that do not use SERCOS. These interface paths support coordinated machining sequences that require precise spindle positioning, feedback handling, and rapid tool changes.
Frequently Asked Questions about KDA 3.1-050-3-LPD-W1:
Q: What is the rated current capacity of the KDA 3.1-050-3-LPD-W1 spindle drive?
A: The KDA 3.1-050-3-LPD-W1 has a rated current of 50 A, making it suitable for demanding spindle applications.
Q: What cooling method is used by the KDA 3.1-050-3-LPD-W1?
A: This spindle drive utilizes forced cooling through a mounted heatsink blower for effective temperature management.
Q: What DC supply voltage does the KDA 3.1-050-3-LPD-W1 spindle drive require?
A: The DC supply voltage required for this model is 300 VDC, providing stable power to the unit.
Q: What is the maximum permitted installation elevation for the KDA 3.1-050-3-LPD-W1?
A: A maximum installation elevation of 1000 meters above sea level is supported by this drive.
Q: What interface is used for speed command input in the KDA 3.1-050-3-LPD-W1 spindle drive?
A: Speed command values are received via the SERCOS interface on this model.
