KDA 3.1-100-3-LYI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-LYI-W1 is a spindle drive from the KDA Spindle Drives series with forced cooling provided by a mounted heatsink blower. It operates with a DC supply voltage of 300 VDC and a rated current of 100 A. The drive includes a SERCOS interface for speed command value and supports incremental encoder output along with a second encoder input and synchronous input.
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Product Description:
The KDA 3.1-100-3-LYI-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. The drive is Version 3 and fits motor-driven machining centers that require precise high-speed rotation. In an automation cell, the unit converts regulated DC-bus energy into controlled three-phase power for a machine spindle, while integrated feedback ports let the motion controller close velocity and position loops. This role allows the spindle to respond to commanded speed changes and controlled acceleration during cutting cycles. The drive forms the electrical link between a CNC command set and the spindle assembly.
Internally, the amplifier draws its DC bus from a 300 VDC supply and can deliver up to 100 A of continuous output current to the connected motor, so cabling and protective devices must match this load level. Thermal energy is removed by a mounted heat sink blower powered from an auxiliary line of 220 V at 50–60 Hz; this arrangement combines a dedicated fan with the drive’s forced cooling mode to stabilize component temperatures during sustained cycles. Because the blower uses its own auxiliary supply, thermal management does not rely only on passive cabinet airflow. The electronics are intended for ambient air from 5 to 45 °C, and installation altitude must remain within 1000 m above sea level. This operating range suits standard control-cabinet installations used with machine spindles.
In operation, speed reference data reach the KDA module over the SERCOS interface, allowing fiber-optic communication with the CNC without separate analog wiring. Using fiber-optic communication also helps isolate command transmission from electrical noise generated by the spindle power stage. For process feedback, the front panel offers an incremental encoder output that retransmits spindle position to auxiliary axes or monitoring devices. It also includes a second encoder input and a synchronous input, which support dual-loop control or tool-holder probes. These signal connections allow the drive to exchange spindle-related data with external control and monitoring hardware.
Frequently Asked Questions about KDA 3.1-100-3-LYI-W1:
Q: What DC supply voltage does the KDA 3.1-100-3-LYI-W1 spindle drive require?
A: The KDA 3.1-100-3-LYI-W1 operates with a DC supply voltage of 300 VDC.
Q: What type of cooling system does the KDA 3.1-100-3-LYI-W1 utilize?
A: This model features forced cooling through a mounted heatsink blower.
Q: What is the rated current of the KDA 3.1-100-3-LYI-W1 spindle drive?
A: The rated current for the KDA 3.1-100-3-LYI-W1 spindle drive is 100 A.
Q: What additional interface is included on the KDA 3.1-100-3-LYI-W1?
A: This model is equipped with an incremental encoder output as an additional interface.
Q: What is the maximum installation elevation for the KDA 3.1-100-3-LYI-W1?
A: The KDA 3.1-100-3-LYI-W1 can be installed at elevations up to 1000 meters above sea level.
