KDA 3.1-150-3-APD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-APD-W1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and a DC supply voltage of 300 VDC. It features forced cooling via a mounted heatsink blower and supports ambient temperatures between 5 and 45 degrees Celsius. The drive includes digital position command value interfaces and a second encoder input for spindle or motor feedback.
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Product Description:
Bosch Rexroth Indramat supplies the KDA 3.1-150-3-APD-W1, a member of the KDA Spindle Drives series. This model is identified as design series 3 within the product line. The drive regulates spindle motors in metal-cutting or woodworking centers by converting a constant 300 V DC bus from an associated supply module into variable-frequency output. Integrated control channels allow the CNC to impose velocity and position targets, letting the unit act as the power stage for rapid acceleration, precise speed holding, and controlled deceleration in closed-loop automation. It is suited for machine tools that require stable spindle response during cutting and positioning sequences.
The drive housing incorporates a mounted heat sink blower that forces air across the power semiconductors. This fan is energized from a separate 220 V/50-60 Hz supply, allowing thermal management to remain independent of the DC link. Because the cooling path is active, the device uses forced cooling, which permits full-load operation without derating. Internally, the converter is tied to a 300 VDC intermediate circuit and can deliver up to 150 A of continuous motor current, matching medium- to high-power spindle ratings. These electrical values must match the connected asynchronous or synchronous spindle motor.
The unit maintains rated performance in ambient temperatures from 5 to 45 °C, provided installation altitude does not exceed 1000 m above sea level. A second encoder socket accepts spindle-mounted or auxiliary motor feedback to close speed loops directly in the drive. For command input, the controller processes a digital position command value interface for stepwise positioning, while an independent analog speed command value input enables continuous RPM adjustment. These inputs allow the CNC to coordinate tool changes, tapping, and surface finishing cycles without additional interface modules.
Frequently Asked Questions about KDA 3.1-150-3-APD-W1:
Q: What is the rated current for the KDA 3.1-150-3-APD-W1 spindle drive?
A: The KDA 3.1-150-3-APD-W1 is rated for a current of 150 A, supporting heavy-duty spindle operations.
Q: What type of cooling does the KDA 3.1-150-3-APD-W1 spindle drive use?
A: Forced cooling is provided by a mounted heatsink blower to manage heat during operation.
Q: What is the DC supply voltage requirement for the KDA 3.1-150-3-APD-W1 spindle drive?
A: The supported DC supply voltage for this spindle drive is 300 VDC.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-APD-W1 spindle drive?
A: The KDA 3.1-150-3-APD-W1 can be installed at elevations up to 1000 meters above sea level.
Q: What types of command value interfaces does the KDA 3.1-150-3-APD-W1 support?
A: Digital position command values and analogue speed command values can be interfaced with this drive.
