KDA 3.2-050-3-AYI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-AYI-W1 is a spindle drive from the KDA Spindle Drives series. It features forced cooling through a mounted heatsink blower and operates with a rated current of 50 Amps. The drive supports a DC supply voltage of 300 VDC and includes both incremental encoder output and a second encoder input for synchronization.
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Product Description:
The KDA 3.2-050-3-AYI-W1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It works as a closed-loop power module for high-speed machine tool spindles. The unit converts the regulated DC link supplied by the cabinet into three-phase stator current and processes motor encoder feedback to maintain rotational accuracy during cutting and grinding operations. Because the regulator closes the loop internally, the cabinet can supply power and command signals while the drive manages fast current correction at the spindle.
The drive receives its main DC bus from a supply unit and is designed for a nominal link voltage of 300 VDC. During continuous machining, it can deliver 50 A of armature current so the connected spindle motor can reach rated torque without thermal overload. Heat generated by the switching devices is removed by a mounted heat sink blower, and the fan is powered from an auxiliary supply rated at 220 V/50–60 Hz. The cooling circuit operates in forced cooling mode, so airflow is actively driven across the heat sink instead of depending on cabinet convection. This arrangement keeps cooling performance consistent even when enclosure airflow is limited by adjacent power modules. The product is series 3 and version 2 within the KDA line.
For installation, the unit operates in ambient temperatures from 5 to 45 °C and at elevations up to 1000 m above sea level. Its control card provides an incremental encoder output that mirrors spindle position data for downstream CNC channels. Motion commands enter the regulator as an analog velocity reference, which allows compatibility with legacy numerical controls that do not use a fieldbus speed command. A second encoder socket also supports second-encoder and synchronous-input functions for dual-path feedback when the application requires additional position tracking.
Frequently Asked Questions about KDA 3.2-050-3-AYI-W1:
Q: What is the rated current capacity of the KDA 3.2-050-3-AYI-W1 spindle drive?
A: The KDA 3.2-050-3-AYI-W1 spindle drive operates with a rated current of 50 A, suitable for high-power spindle applications.
Q: What cooling method is used for the KDA 3.2-050-3-AYI-W1 spindle drive?
A: This model uses a mounted heatsink blower with forced cooling to maintain optimal thermal conditions.
Q: What is the allowed ambient temperature range for the KDA 3.2-050-3-AYI-W1?
A: The ambient temperature range for this drive is 5 to 45 degrees Celsius.
Q: What are the power requirements for the heatsink blower on the KDA 3.2-050-3-AYI-W1?
A: A 220V AC supply at 50-60Hz is required to power the heatsink blower on this spindle drive.
Q: What encoder interface options are available on the KDA 3.2-050-3-AYI-W1?
A: This model features an incremental encoder output and supports a second encoder input with synchronous input capability.
