KDA 2.1-150-3-DPD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-DPD-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and operates with a DC supply voltage of 300 VDC. This unit uses forced cooling with a mounted heatsink blower that requires a 220V AC source at 50-60Hz, and supports digital speed and position command values.
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Product Description:
Bosch Rexroth Indramat's KDA 2.1-150-3-DPD-W1 is a spindle drive within the KDA Spindle Drives series. The unit converts regulated DC power into three-phase output for high-speed machining spindles and works with digital numerical control systems that demand rapid torque response. It is intended for machine tools where spindle speed must track command changes with very little delay. By hosting both speed and position channels, it acts as the central drive element that synchronizes spindle motion with programmed toolpaths in automated production lines.
The power section is sized for a continuous output of 150 A, allowing the drive to energize large spindle motors without current derating at nominal load. Its intermediate circuit is stabilized at 300 VDC, so a matching supply module must deliver that voltage to maintain the specified torque bandwidth. Motion commands are issued through a parallel bus that accepts a digital 16-bit parallel speed word; this resolution gives the controller 65,536 discrete velocity points over the selected range. A separate channel receives a digital position command value, enabling coordinated tapping or contour turning. For the heat sink blower, the integrated fan draws from a single-phase line rated at 220 V/50–60 Hz, helping keep semiconductor junction temperatures within safe limits during prolonged acceleration cycles.
A mounted heat sink blower and a forced-air path make up the drive's thermal management system, so cabinet layout must allow unobstructed exhaust flow. Correct service temperatures range from 5 to 45 °C, which matches general machine-room conditions without auxiliary enclosure cooling. Installations can be sited up to 1000 m above sea level; beyond this altitude, lower air density reduces cooling effectiveness and may require derating. A secondary encoder port supports additional spindle or auxiliary motor feedback, which helps maintain phase alignment during tool changes and other synchronized motions. The unit is in Series 2, which identifies the product generation and connector style used for this KDA version.
Frequently Asked Questions about KDA 2.1-150-3-DPD-W1:
Q: What is the rated current for the KDA 2.1-150-3-DPD-W1 spindle drive?
A: This model operates with a rated current of 150 A for high-power spindle applications.
Q: How is the KDA 2.1-150-3-DPD-W1 spindle drive cooled?
A: Forced cooling is achieved using a mounted heatsink blower on the KDA 2.1-150-3-DPD-W1.
Q: What power supply is required for the heatsink blower in the KDA 2.1-150-3-DPD-W1?
A: A 220V AC source at 50-60Hz powers the heatsink blower for this spindle drive.
Q: What type of speed command input does the KDA 2.1-150-3-DPD-W1 support?
A: Digital speed command inputs are provided through a 16-bit parallel interface.
Q: What is the purpose of the second encoder input on the KDA 2.1-150-3-DPD-W1?
A: A second encoder input is available for spindle feedback or additional motor feedback.
