KDA 2.1-150-3-L00-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-L00-U1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and operates with a DC supply voltage of 300 VDC. This drive uses forced cooling through a mounted heatsink blower and functions within an ambient temperature range of 5 to 45 degrees Celsius.
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Product Description:
The KDA 2.1-150-3-L00-U1 spindle drive is produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. The unit conditions DC bus energy and feeds three-phase power to machine-tool spindles, allowing the numerical controller to modulate rotational speed in line with programmed profiles. By coupling electrical torque generation with feedback from the main encoder channel, it maintains constant surface speed during cutting or grinding so that material removal rates stay predictable throughout the cycle. This control approach helps the spindle hold the commanded speed when cutting load changes during a machining pass. It is suited to machine tools that rely on repeatable spindle behavior for turning, milling, and grinding operations.
The power section can deliver a continuous output of 150 A, which is the maximum RMS current that downstream motor windings may draw without thermal derating. A regulated link voltage of 300 VDC supplies this stage, matching the common bus of Indramat drive cabinets. Thermal management uses forced cooling; a heat-sink-mounted blower pushes ambient air over the fin array to keep semiconductor junction temperatures within safe limits. That blower is energized from an auxiliary line of 115 V/50-60 Hz, separating its airflow duty from the main DC circuit. Setpoint data are introduced via the SERCOS interface, enabling deterministic fiber-optic communication so the controller can issue speed commands and receive diagnostic information with very low timing variation. This allows the control system to coordinate spindle behavior with the rest of the machine during acceleration, steady cutting, and braking.
The drive functions between 5 to 45 °C ambient and may be installed up to 1000 m above sea level before output must be derated for reduced air density. Expansion slots are reserved, but the factory configuration uses no additional interface option, and a second encoder input is omitted to simplify wiring on standard spindle assemblies. Reserved slots leave room in the housing, while the base interface arrangement remains unchanged. The unit is part of generation 2 in the series.
Frequently Asked Questions about KDA 2.1-150-3-L00-U1:
Q: What cooling method does the KDA 2.1-150-3-L00-U1 spindle drive use?
A: This model uses a mounted heatsink blower for forced cooling.
Q: What is the rated current of the KDA 2.1-150-3-L00-U1 spindle drive?
A: The KDA 2.1-150-3-L00-U1 is designed for a rated current of 150 A.
Q: What voltage and frequency does the heatsink blower require for the KDA 2.1-150-3-L00-U1?
A: The AC source for the heatsink blower operates at 115V and supports 50-60Hz.
Q: What is the DC supply voltage requirement for the KDA 2.1-150-3-L00-U1?
A: This spindle drive accepts a DC supply voltage of 300 VDC.
Q: Which interface is used for speed command input on this spindle drive?
A: The KDA 2.1-150-3-L00-U1 uses a SERCOS Interface for speed command input.
