KDA 3.1-100-3-D00-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-D00-W1 is a spindle drive from the KDA Spindle Drives series. It has a rated current of 100 Amps and operates on a DC supply voltage of 300 VDC. The unit features forced cooling with a mounted heatsink blower and is suitable for ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 3.1-100-3-D00-W1 is a drive module produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It serves as the power section between a CNC controller and a machine tool spindle motor, transforming the shared DC bus into finely regulated three-phase output so cutting speed and torque follow programmed profiles. This allows the spindle to respond quickly to command changes during drilling, milling, and turning cycles. Stable power conversion also helps the machine maintain consistent cutting performance as spindle load changes through the process. In closed-loop machine tools, that behavior supports repeatable surface finish and smoother transitions between roughing and finishing moves.
This model operates from a DC link of 300 VDC, and its power stage is rated for a continuous output of 100 A, allowing it to energize high-power spindle windings without derating. Thermal management is handled by a heat sink-mounted blower, and the fan is supplied from an auxiliary line of 220 V 50/60 Hz. The airflow removes heat directly from the aluminum fin stack, and overall temperature is controlled through forced cooling so the unit can support prolonged cutting passes. The separate blower supply keeps cooling available regardless of the main power section load, which helps stabilize internal operating temperature during long cycles. The Series 3 design uses gate drivers and protection circuits matched to the switching speed required by modern spindle motors.
The unit is intended for standard indoor factory conditions, with an allowable ambient range of 5 to 45 °C and installation altitudes up to 1000 m above sea level. Command data reaches the control electronics through a digital 16-bit parallel word, giving precise speed setpoints with minimal latency. Parallel command transfer is useful where the controller must update spindle references quickly during rapid speed changes or rigid tapping sequences. There is no additional interface option, and the second encoder socket is omitted. This layout keeps cabinet wiring straightforward and leaves the module focused on primary spindle-control functions.
Frequently Asked Questions about KDA 3.1-100-3-D00-W1:
Q: What series does the KDA 3.1-100-3-D00-W1 spindle drive belong to?
A: The KDA 3.1-100-3-D00-W1 spindle drive is part of the KDA Spindle Drives series.
Q: How is the KDA 3.1-100-3-D00-W1 spindle drive cooled?
A: This spindle drive uses forced cooling through a mounted heatsink blower for efficient temperature management.
Q: What is the rated current of the KDA 3.1-100-3-D00-W1 spindle drive?
A: The KDA 3.1-100-3-D00-W1 operates with a rated current of 100 A, supporting high power applications.
Q: What is the allowable ambient temperature range for the KDA 3.1-100-3-D00-W1?
A: Its ambient temperature range is 5 to 45 degrees Celsius, allowing safe operation within these temperatures.
Q: What type of speed command value does the KDA 3.1-100-3-D00-W1 support?
A: This spindle drive accepts a digital speed command value with a 16-bit parallel interface.
