KDA 3.3-150-3-APD-W1 Bosch Rexroth Indramat
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MPN: R911274668
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The Bosch Rexroth Indramat KDA 3.3-150-3-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 a forced cooling system with a mounted heatsink blower operating on 220V, 50-60Hz. Additional interfaces include a digital position command value and a second encoder input for spindle or motor feedback.
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Product Description:
The KDA 3.3-150-3-APD-W1 spindle drive is built by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a drive-mounted power module, it regulates the three-phase output supplied to high-speed machine-tool spindles, converting constant bus voltage into timed current pulses so cutters can maintain programmed surface speed during drilling, milling, and grinding. It is intended for spindle applications that need stable speed control while cutting loads change throughout a machining cycle. The unit is version 3 and uses the standard rack height and connector pattern found in existing automation cabinets.
The power stage can deliver a continuous phase current of 150 A while drawing energy from a common link maintained at 300 VDC. An auxiliary feed of 220 V/50-60 Hz supplies the heat sink fan, separating thermal management from the main converter so cooling can remain independent of spindle power demand. Air is moved across the semiconductor stack by a mounted heat sink blower, and the enclosure uses forced cooling to maintain safe operating temperature during extended constant-torque cuts. This arrangement supports continuous operation in machine tools where spindle loading can remain high for long cutting periods.
Command processing is mixed mode, allowing the drive to respond to both speed and positioning requests from the control system. The velocity channel accepts an analog speed reference, while the dedicated interface accepts a digital position command value for orient or indexing moves. A second encoder input is available for spindle or auxiliary motor feedback, providing the speed and angle data needed for synchronous tapping and rigid threading. The unit is rated for continuous service in ambient air from 5 to 45 degrees Celsius, and it maintains full current capability up to 1000 m above sea level.
Frequently Asked Questions about KDA 3.3-150-3-APD-W1:
Q: What type of cooling system does the KDA 3.3-150-3-APD-W1 spindle drive utilize?
A: The KDA 3.3-150-3-APD-W1 features a mounted heatsink blower for forced cooling.
Q: What is the rated current for the KDA 3.3-150-3-APD-W1?
A: This spindle drive is rated for a continuous current of 150 A.
Q: What DC supply voltage is required for the KDA 3.3-150-3-APD-W1?
A: The drive operates with a DC supply voltage of 300 VDC.
Q: What AC source is required for the heatsink blower in the KDA 3.3-150-3-APD-W1?
A: A 220V AC power source at 50-60 Hz is needed for the heatsink blower.
Q: What is the maximum installation elevation for the KDA 3.3-150-3-APD-W1 spindle drive?
A: This unit is suitable for installation at elevations up to 1000 meters above sea level.
