KDA 3.1-150-3-DP0-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-DP0-U1 is a spindle drive in the KDA Spindle Drives series with a rated current of 150 Amps and operates on a DC supply voltage of 300 VDC. It features forced cooling via a mounted heatsink blower and can be used at elevations up to 1000 meters above sea level. The drive supports a digital speed command value with 16-bit parallel input and a second encoder input for spindle or motor feedback.
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Product Description:
The KDA 3.1-150-3-DP0-U1 spindle drive is built by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It is intended to regulate the torque and speed of high-speed machining spindles, receiving commands from a CNC controller and delivering controlled current to the attached motor. This allows the spindle to follow programmed acceleration, speed-hold, and deceleration commands during machining. By combining a DC link power stage, closed-loop regulation, and integrated cooling hardware, the unit forms a compact module for automation cabinets.
Version 3 of this drive operates on a DC bus of 300 VDC, so the upstream power supply must maintain that level for proper inverter operation. Its continuous current rating is 150 A, which limits the spindle motors that can be paired with the unit. To remove switching and copper losses, the drive uses a heat sink-mounted blower powered by a dedicated 115 V at 50/60 Hz auxiliary line. This arrangement provides separate airflow for the power section rather than relying only on cabinet ventilation. The drive also uses forced cooling to support stable temperatures during prolonged high-load cycles. Speed reference data are transmitted as a 16-bit digital parallel word, which provides fine spindle speed resolution without relying on analog command signals.
The permitted ambient range is 5 to 45 °C, allowing installation in standard shop environments. Installation is permitted up to 1000 m above sea level before derating is required. A second encoder socket is available when spindle feedback or extra motor feedback is needed for axis synchronization. That added feedback path supports applications that require spindle monitoring or coordinated axis motion. The control board comes without an additional interface option, so only the standard connections are provided.
Frequently Asked Questions about KDA 3.1-150-3-DP0-U1:
Q: How is the KDA 3.1-150-3-DP0-U1 spindle drive cooled?
A: Cooling for the KDA 3.1-150-3-DP0-U1 is provided by a mounted heatsink blower using forced cooling.
Q: What is the rated current of the KDA 3.1-150-3-DP0-U1 spindle drive?
A: The KDA 3.1-150-3-DP0-U1 spindle drive operates with a rated current of 150 A.
Q: What type of speed command value does the KDA 3.1-150-3-DP0-U1 accept?
A: This drive uses a digital 16-bit parallel interface for speed command input.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-DP0-U1?
A: The maximum installation elevation for this spindle drive is 1000 meters above sea level.
Q: What ambient temperature range is supported by the KDA 3.1-150-3-DP0-U1?
A: The ambient operating temperature range for this drive is from 5 to 45 degrees Celsius.
