KDA 2.1-150-3-AQI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-AQI-W1 is part of the KDA Spindle Drives series and operates as a spindle drive with a rated current of 150 Amps. It features a forced cooling system with a mounted heatsink blower powered by a 220V AC source and supports an ambient temperature range of 5 to 45 degrees Celsius. The drive uses a 300 VDC supply voltage and includes an incremental encoder output interface.
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Product Description:
The KDA 2.1-150-3-AQI-W1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It serves as the power stage between a machine controller and a high-speed motor, converting a fixed DC bus into a three-phase output for regulated spindle speed and torque. By matching commanded velocity with real-time load feedback, the drive supports accurate machining in metal-cutting, grinding, and other automated processes where steady spindle control is required.
The drive operates from a DC intermediate circuit of 300 VDC, which supports compact power conversion while still providing substantial bus energy for rapid spindle acceleration. The drive has a rated current of 150 A, allowing it to sustain continuous load within its intended operating range. Thermal management is provided by a mounted heatsink blower, and the fan is supplied with 220 V/50–60 Hz from an auxiliary source so airflow can remain available even when the DC bus is not energized. Spindle speed reference enters the unit as an analog signal, which allows direct connection to CNC controls that provide ±10 V command signals. This arrangement supports straightforward integration in systems that rely on conventional analog speed commands rather than network-based motion control.
An additional incremental encoder output sends line-driver pulses to the CNC so spindle position can be monitored without a separate feedback device. Operation is limited to an ambient temperature range of 5 to 45 °C, so the cabinet must keep internal heat within that window during continuous duty. The installation altitude is limited to 1000 m above sea level, because lower air density reduces the effectiveness of convective heat removal. To support thermal stability, the unit uses forced cooling to maintain airflow across the heatsink during low-speed and high-load operation. This encoder feedback also helps the control system maintain precise spindle orientation and consistent positional tracking during synchronized machine movements.
Frequently Asked Questions about KDA 2.1-150-3-AQI-W1:
Q: What DC supply voltage does the KDA 2.1-150-3-AQI-W1 use?
A: The KDA 2.1-150-3-AQI-W1 operates with a DC supply voltage of 300 VDC.
Q: What is the rated current for the KDA 2.1-150-3-AQI-W1 spindle drive?
A: This spindle drive is rated for a continuous current of 150 A.
Q: How is the KDA 2.1-150-3-AQI-W1 spindle drive cooled?
A: A mounted heatsink blower provides forced cooling on this model.
Q: What additional interface does the KDA 2.1-150-3-AQI-W1 offer?
A: The KDA 2.1-150-3-AQI-W1 supports incremental encoder output as an additional interface.
Q: What is the highest ambient temperature the KDA 2.1-150-3-AQI-W1 can operate in?
A: The maximum ambient operating temperature for this model is 45°C.
