KDA 3.1-150-3-DQI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-DQI-W1 is a spindle drive from the KDA Spindle Drives series, featuring a rated current of 150 Amps and operating on a DC supply voltage of 300 VDC. It uses a mounted heatsink blower for forced cooling and works in ambient temperatures from 5 to 45 degrees Celsius. The drive supports an incremental encoder output and takes a speed command value in digital 16-bit parallel format.
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Product Description:
The KDA 3.1-150-3-DQI-W1 is a drive module produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It is installed between the DC supply and a machine-tool spindle motor, regulating speed and torque so that cutting, grinding, or drilling operations remain stable while the load varies. By interpreting digital speed references from a higher-level controller and modulating its output current, the unit forms the electrical interface that lets CNC systems maintain repeatable surface finishes and cycle times.
This controller is designed for a continuous output of 150 A, enabling it to energize large-frame spindle motors during rapid acceleration and heavy material removal. Internally, it connects to a DC bus maintained at 300 VDC, which sets the available voltage for the inverter stage. Thermal energy generated by switching devices is removed with a mounted heat sink blower, and the blower itself is powered from an auxiliary source rated at 220 V/50-60 Hz. Airflow is directed through fin channels, matching the unit’s specified forced cooling mode so semiconductor junction temperatures remain within safe limits during continuous high-current duty. The drive hardware is release level 3 of the KDA platform.
The module can be mounted in panels where ambient air remains between 5 °C and 45 °C; outside this range, derating or additional enclosure conditioning is required. Installation is permitted up to 1000 m above sea level without adjustment, allowing rated current at most factory altitudes. For position synchronization, the front connector carries an incremental encoder output that repeats motor feedback to external monitoring equipment. Speed demand reaches the control logic through a 16-bit parallel interface, allowing precise numerical commands from the CNC kernel while avoiding the conversion delays inherent in analog channels.
Frequently Asked Questions about KDA 3.1-150-3-DQI-W1:
Q: What is the rated current of the KDA 3.1-150-3-DQI-W1 spindle drive?
A: The KDA 3.1-150-3-DQI-W1 spindle drive has a rated current of 150 A.
Q: What DC supply voltage is required for the KDA 3.1-150-3-DQI-W1?
A: This model operates with a DC supply voltage of 300 VDC.
Q: How is the KDA 3.1-150-3-DQI-W1 spindle drive cooled?
A: The KDA 3.1-150-3-DQI-W1 uses forced cooling via a mounted heatsink blower.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-DQI-W1?
A: The spindle drive can be installed at elevations up to 1000 meters above sea level.
Q: What type of speed command value input does the KDA 3.1-150-3-DQI-W1 support?
A: It supports digital speed command values through a 16-bit parallel interface.
