KDA 3.2-050-3-APD-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-APD-U1 is a spindle drive from the KDA Spindle Drives series, featuring a rated current of 50 Amps and a DC supply voltage of 300 VDC. It uses a mounted heatsink blower with forced cooling and supports both analog speed command values and digital position command value interfaces. The drive operates in ambient temperatures from 5 to 45 degrees Celsius and can be installed up to 1000 meters above sea level.
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Product Description:
The KDA 3.2-050-3-APD-U1 is a spindle drive manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It is series 3 and version 2. The unit acts as the power stage between a regulated DC bus and a machine-tool spindle, converting controller commands into precise torque and speed profiles required for milling, grinding, or drilling. Because spindle axes often face changing cutting loads, the drive regulates motor current in real time during acceleration, steady cutting, and deceleration. Its cabinet-mount design supports installation inside control enclosures without requiring a separate external power stage.
The drive is supplied from a DC link of 300 VDC and can deliver up to 50 A of output current to the motor windings. Thermal management relies on a mounted heat sink blower that is fed by an auxiliary line rated at 115 V/50-60 Hz; air is pulled across the fins and expelled to stabilize semiconductor temperatures. This active airflow works with the drive’s forced cooling design to keep the electronics within an ambient range of 5 to 45 °C. A rear panel accepts analog speed references, letting the controller transmit a continuous command rather than discrete steps. Digital diagnostics monitor current, DC bus level, and blower status during operation.
Installation is permitted up to 1000 m above sea level, so altitude remains within the stated operating limit. Control wiring includes a second encoder socket for spindle or auxiliary motor feedback, and an additional channel accepts a digital position command value to support rigid tapping or contouring modes alongside the analog speed command value. Using these interfaces with internal monitoring helps the unit maintain drive accuracy over the full load range while separating motion control logic from the power electronics. This arrangement supports synchronized spindle functions in machines that use both speed-based and position-based commands.
Frequently Asked Questions about KDA 3.2-050-3-APD-U1:
Q: What cooling method does the KDA 3.2-050-3-APD-U1 spindle drive use?
A: The KDA 3.2-050-3-APD-U1 uses a mounted heatsink blower for cooling, providing forced cooling during operation.
Q: What is the rated current of the KDA 3.2-050-3-APD-U1 spindle drive?
A: This spindle drive is rated for a current of 50 A, supporting demanding applications.
Q: What is the function of the second encoder input on the KDA 3.2-050-3-APD-U1?
A: The second encoder input can be utilized for spindle feedback or additional motor feedback connections.
Q: What is the ambient temperature range for the KDA 3.2-050-3-APD-U1?
A: The KDA 3.2-050-3-APD-U1 operates within an ambient temperature range of 5 to 45 degrees Celsius.
Q: What is the required AC source for the heatsink blower on the KDA 3.2-050-3-APD-U1?
A: This model accepts an AC source of 115V at 50-60Hz for the heatsink blower.
