KDA 3.2-050-3-DQI-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-DQI-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 50 Amps and a DC supply voltage of 300 Volts. It uses forced cooling with a mounted heatsink blower that operates on 115V at 50-60Hz and functions within an ambient temperature range of 5 to 45 degrees Celsius. The drive supports a digital 16 bit parallel speed command value and includes an incremental encoder output.
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Product Description:
The KDA 3.2-050-3-DQI-U1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It operates as the dedicated axis amplifier for high-speed spindle motors, converting regulated DC bus power into variable three-phase output that follows CNC velocity and torque commands. By controlling motor current during acceleration, steady running, and deceleration, the unit supports stable spindle behavior during cutting, tapping, and grinding cycles. This operating role makes it suitable for machine tools that require accurate speed regulation and consistent response to changing mechanical load.
The drive uses a bus link rated at 300 VDC, and its output stage can continuously deliver 50 A to the connected spindle motor, making it suitable for medium-power machining centers. Thermal energy from the output devices is removed by a heat sink-mounted blower supplied with 115 V at 50/60 Hz. This arrangement provides forced cooling, which helps keep semiconductor temperatures within normal operating limits during extended rapid-cycle use. The blower directs air across the heat sink surfaces rather than relying on passive convection alone, and that supports stable operation when spindle demand changes quickly between acceleration and braking intervals.
The controller is intended for ambient temperatures from 5 to 45 °C and for installation at elevations up to 1000 m above sea level. Command data enters the velocity loop through a 16-bit digital parallel interface, giving the CNC fine command resolution for spindle control. Feedback continuity is supported by an incremental encoder output, which passes spindle position information to external monitoring devices or synchronized axes. That is useful when threading, orientation, or other coordinated machine functions depend on a consistent position reference without requiring an additional feedback transducer.
Frequently Asked Questions about KDA 3.2-050-3-DQI-U1:
Q: What type of cooling system does the KDA 3.2-050-3-DQI-U1 spindle drive use?
A: The KDA 3.2-050-3-DQI-U1 uses a mounted heatsink blower for cooling, which operates via forced air.
Q: What is the required AC source for the heatsink blower on the KDA 3.2-050-3-DQI-U1?
A: This spindle drive requires an AC power source of 115V at 50-60Hz to operate the heatsink blower.
Q: What is the rated current capability of the KDA 3.2-050-3-DQI-U1 spindle drive?
A: The maximum rated current for this model is 50 A, supporting high-power spindle applications.
Q: What is the maximum installation elevation for the KDA 3.2-050-3-DQI-U1?
A: The KDA 3.2-050-3-DQI-U1 can be installed at elevations up to 1000 meters above sea level.
Q: What type of speed command value input does the KDA 3.2-050-3-DQI-U1 accept?
A: A digital speed command of 16-bit parallel is used for precise speed control.
