KDA 3.3-150-3-AYI-W1 Bosch Rexroth Indramat
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MPN: R911274745
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The Bosch Rexroth Indramat KDA 3.3-150-3-AYI-W1 is a spindle drive from the KDA Spindle Drives series, featuring a rated current of 150 Amps and a DC supply voltage of 300 VDC. It includes a mounted heatsink blower for forced cooling and supports an ambient temperature range of 5 to 45 degrees Celsius. The drive provides incremental encoder output and accepts speed command values in analog format.
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Product Description:
The KDA 3.3-150-3-AYI-W1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It is installed in third-generation machining centers to convert DC-link power into tightly regulated three-phase output for high-speed tool spindles, so cutting velocity stays constant while material hardness or feed rate changes. By integrating current regulation, fault monitoring, and a heat sink blower in one housing, the unit simplifies cabinet layout and supports automated metal-cutting or grinding cells that demand precise speed control.
The drive draws energy from a 300 VDC intermediate circuit and can deliver up to 150 A of motor phase current, giving it the capacity to start and accelerate large spindle rotors without stall. A single-phase blower supply rated at 220 V AC 50/60 Hz powers the mounted fan, which pulls heat through the finned heat sink. Operation is permitted in ambient air from 5 to 45 °C; airflow and cabinet conditioning must keep components within this range to avoid thermal derating. Hardware in Series 3 adds internal logic refinements that shorten current-loop response and improve velocity stability when the controller receives an analog reference from the connected CNC.
The unit may be installed at elevations up to 1000 m above sea level without changes to parameter settings. Cooling is provided by forced cooling, so the blower outlet must remain unobstructed. For feedback tasks, an auxiliary connector provides an incremental encoder output that can be routed to a PLC or oscilloscope for speed verification, and a separate port accepts a second encoder and synchronous input for dual-loop applications. The speed loop is commanded with an analog speed command, typically a ±10 V signal, enabling straightforward integration with legacy or modern numerical controls that prefer voltage references.
Frequently Asked Questions about KDA 3.3-150-3-AYI-W1:
Q: What is the rated current for the KDA 3.3-150-3-AYI-W1 spindle drive?
A: The KDA 3.3-150-3-AYI-W1 operates with a rated current of 150 A.
Q: What cooling method is employed by the KDA 3.3-150-3-AYI-W1 spindle drive?
A: This spindle drive uses a mounted heatsink blower for forced cooling.
Q: What is the required DC supply voltage for the KDA 3.3-150-3-AYI-W1?
A: The DC supply voltage requirement for this model is 300 VDC.
Q: What type of additional interface is available on the KDA 3.3-150-3-AYI-W1?
A: An incremental encoder output is provided as an additional interface on this drive.
Q: What is the allowable ambient temperature range for the KDA 3.3-150-3-AYI-W1 drive?
A: The KDA 3.3-150-3-AYI-W1 operates within an ambient temperature range of 5 to 45 degrees Celsius.
