KDA 2.1-150-3-DQD-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-DQD-U1 is a spindle drive that is part of the KDA Spindle Drives series. It features a rated current of 150 Amps and operates at a DC supply voltage of 300 VDC. The drive uses a mounted heatsink blower for forced cooling and supports digital position and speed command value interfaces.
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Product Description:
The Bosch Rexroth Indramat KDA 2.1-150-3-DQD-U1 is a spindle drive in the KDA Spindle Drives series used to power and regulate high-speed machine-tool spindles in automated production lines. As a drive controller, it converts a fixed DC supply into a controlled three-phase output so numerical control systems maintain cutter or workpiece speed with minimal deviation. Integrating this unit simplifies cabinet wiring because the power electronics, control logic, and a dedicated heat sink blower are packaged in one chassis suited for closed-loop machining axes. This arrangement supports applications that require stable spindle behavior during cutting, drilling, and finishing operations.
The unit belongs to series 2 and operates from a regulated DC bus of 300 VDC. Its power stage is rated for a continuous motor phase current of 150 A, allowing it to drive large synchronous or induction spindle motors without exceeding temperature limits. Thermal management relies on a mounted heat sink blower that expels heat directly through the fin channels, and this assembly uses forced cooling so internal temperature rise remains predictable during long duty cycles. Spindle velocity is adjusted through a 16-bit parallel digital speed command, enabling fine command resolution for precise surface finishes on workpieces. The integrated power stage and cooling arrangement allow the drive to support sustained spindle demand in compact machine cabinets.
The heat sink fan draws its control power from a separate 115 V/50–60 Hz auxiliary line, isolating blower loading from the main DC link. Stable operation is specified within an ambient range of 5 to 45 °C, and performance data remain valid up to 1000 m above sea level. Alongside the speed channel, a digital position command value interface is available so the same drive can handle spindle orientation tasks such as tool-change alignment or thread cutting. The interface supports controlled spindle indexing when the application requires more than continuous speed regulation.
Frequently Asked Questions about KDA 2.1-150-3-DQD-U1:
Q: What cooling method is used in the KDA 2.1-150-3-DQD-U1 spindle drive?
A: The KDA 2.1-150-3-DQD-U1 spindle drive features a forced cooling system using a mounted heatsink blower.
Q: What is the rated current of the KDA 2.1-150-3-DQD-U1 spindle drive?
A: The rated current for the KDA 2.1-150-3-DQD-U1 is 150 A, making it suitable for large-scale spindle applications.
Q: How does the KDA 2.1-150-3-DQD-U1 receive speed command values?
A: This drive supports digital speed command values using a 16-bit parallel interface.
Q: What is the power requirement for the heatsink blower on the KDA 2.1-150-3-DQD-U1?
A: The AC source requirement for the heatsink blower of this model is 115V at 50-60Hz.
Q: What is the maximum installation elevation for the KDA 2.1-150-3-DQD-U1 spindle drive?
A: The KDA 2.1-150-3-DQD-U1 can be installed at elevations up to 1000 meters above sea level.
