KDA 3.1-050-3-LYI-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-LYI-U1 is part of the KDA Spindle Drives series and is rated for a current of 50 Amps with a DC supply voltage of 300 Volts. It uses forced cooling via a mounted heatsink blower powered by a 115V AC source and operates in ambient temperatures from 5 to 45 degrees Celsius. This spindle drive supports SERCOS interface for speed command value and includes an incremental encoder output with second encoder and synchronous input options.
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Product Description:
The KDA 3.1-050-3-LYI-U1 spindle drive is built by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. In machining centers and automated production cells, the drive converts a fixed DC bus into controlled three-phase power so that high-speed spindle motors can follow digital speed references with minimal lag. By integrating drive electronics, cooling hardware, and feedback channels in a single module, it streamlines cabinet layouts and connects directly to motion controllers on the factory floor. This arrangement supports smooth acceleration, stable cutting speed, and controlled deceleration during demanding spindle cycles.
Hardware version 3 of the unit operates from a DC link of 300 VDC, and the power section can deliver up to 50 A of continuous output for demanding cutting or grinding cycles. That current capacity supports sustained torque delivery during long machining passes and repeated load changes. Speed commands reach the controller through a SERCOS interface, providing deterministic fiber-optic communication with CNC or PLC platforms. Position verification can be routed outward via the incremental encoder output, while a dedicated second encoder input and synchronous input accept high-resolution feedback from tandem sensors, enabling spindle orientation and tool-change alignment without extra interface cards.
Thermal stability is maintained by a mounted heatsink blower that draws supply air through forced channels, and its fan motor is energized from an auxiliary line rated at 115 V/50-60 Hz. The drive’s internal thermal model coordinates this active airflow with the preset forced cooling mode so heat is removed even during low-speed spindle operation. Installation is specified for sites up to 1000 m above sea level, and reliable performance is stated for ambient temperatures between 5 and 45 °C, making the module suitable for most enclosed machine halls without additional conditioning. The airflow arrangement also helps keep internal components within their intended operating range when the spindle runs slowly but remains heavily loaded.
Frequently Asked Questions about KDA 3.1-050-3-LYI-U1:
Q: What cooling method is used in the KDA 3.1-050-3-LYI-U1 spindle drive?
A: The KDA 3.1-050-3-LYI-U1 spindle drive uses forced cooling provided by a mounted heatsink blower for optimal temperature management.
Q: What is the rated current of the KDA 3.1-050-3-LYI-U1 spindle drive?
A: This model supports a rated current of 50 A for heavy-duty spindle drive applications.
Q: What is the required DC supply voltage for the KDA 3.1-050-3-LYI-U1?
A: The spindle drive accepts a DC supply voltage of 300 VDC.
Q: What additional interface is included on the KDA 3.1-050-3-LYI-U1 drive?
A: Incremental encoder output is provided as an additional interface on this model.
Q: What is the maximum installation elevation for the KDA 3.1-050-3-LYI-U1 spindle drive?
A: The KDA 3.1-050-3-LYI-U1 can be installed at elevations up to 1000 meters above sea level.
