KDA 2.1-150-3-DYI-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-DYI-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and operates with a DC supply voltage of 300 VDC. It features forced cooling using a mounted heatsink blower that runs on a 115V, 50-60Hz AC source. The drive supports a 16-bit parallel digital speed command and includes incremental encoder output with a second encoder and synchronous input.
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Product Description:
The KDA 2.1-150-3-DYI-U1 belongs to the Bosch Rexroth Indramat KDA Spindle Drives series and is a Series 2 unit. As a spindle drive, it supplies controlled three-phase power to high-speed motorized spindles used in machining centers and similar automation platforms. A mounted heat sink blower is integrated for temperature control, and the product accepts the 300 VDC link voltage delivered by compatible Indramat power supplies while forwarding real-time feedback from one or two position encoders to the machine controller.
The drive draws its main bus from 300 VDC and can deliver up to 150 A of continuous motor current so that large spindle motors can accelerate quickly to their programmed velocity. Thermal energy is removed through forced cooling, and the attached blower is powered from an auxiliary source rated at 115 V/50-60 Hz. Rotor speed is commanded through a parallel data word, and the unit interprets a 16-bit parallel digital command and converts it into a precise current profile. Generation 2 hardware adds tighter current regulation and reduced switching losses compared with earlier KDA units, maintaining stable torque even during rapid load changes.
The environmental envelope permits operation from 5 to 45 °C and installation up to 1000 m above sea level without derating, supporting shop-floor mounting close to the spindle. Real-time position information is available through the built-in incremental encoder output, and an additional channel that accepts a second encoder input and synchronous input allows dual-loop control for higher accuracy on large axes. The blower assembly is a mounted heat sink type, ensuring airflow stays localized to the power semiconductors and minimizing cabinet heat. The digital command input and encoder channels support coordinated spindle positioning in CNC systems.
Frequently Asked Questions about KDA 2.1-150-3-DYI-U1:
Q: What type of cooling is used in the KDA 2.1-150-3-DYI-U1 spindle drive?
A: The KDA 2.1-150-3-DYI-U1 spindle drive is equipped with forced cooling via a mounted heatsink blower.
Q: What is the rated current for the KDA 2.1-150-3-DYI-U1 spindle drive?
A: This model supports a rated output current of 150 A to drive spindle motors.
Q: What DC supply voltage does the KDA 2.1-150-3-DYI-U1 need?
A: The DC supply voltage required for this spindle drive is 300 VDC.
Q: What additional interface is provided on the KDA 2.1-150-3-DYI-U1 spindle drive?
A: An incremental encoder output is available as an additional interface on this model.
Q: How is the speed command value input to the KDA 2.1-150-3-DYI-U1?
A: The speed command value for this drive is provided in digital form as a 16-bit parallel signal.
