KDA 3.1-150-3-DQD-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-DQD-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. The drive uses a mounted heatsink blower for forced cooling and supports digital position and speed command values.
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Product Description:
The KDA 3.1-150-3-DQD-W1 is a spindle drive manufactured by Bosch Rexroth Indramat and assigned to the KDA Spindle Drives series. In automated machining cells, the unit converts DC bus energy into three-phase power that regulates the speed and torque of high-frequency motorized spindles, allowing coordinated cutting, drilling, or grinding cycles under CNC control. Hardware index 3 indicates the internal board revision used in this product generation. It accepts motion instructions directly from the higher-level controller via dedicated digital lines, eliminating the need for analog conversion hardware. This arrangement helps the drive respond quickly to commanded spindle changes during tightly coordinated machining operations.
This drive is energized from a common DC link at 300 VDC, and the internal inverter stages modulate that bus to supply the spindle windings. A continuous output of 150 A supports large-frame motors without derating during sustained metal-removal passes. Its integral blower is fed by a separate single-phase line rated at 220 V/50–60 Hz, so the cooling circuit does not rely on the DC bus for fan power. Velocity references arrive through a digital 16-bit parallel interface, giving the numerical control fine speed resolution. Thermal loads are removed through a mounted heatsink blower that pushes air directly across the IGBT assembly. The digital reference path also helps maintain accurate commanded speed without relying on an analog input stage.
The cooling method is forced cooling, so airflow remains present regardless of spindle load and helps keep semiconductor temperatures within limits. The permitted ambient range is 5 to 45 °C, and the unit can operate at elevations up to 1000 m above sea level. These installation limits help preserve current capability where reduced air density would otherwise lower cooling performance. Alongside the speed channel, a digital position command value port lets the CNC issue precise phase-synchronous positioning requests for orient and thread-cut modes. This supports spindle indexing functions that must align the shaft to a controlled angular position before the next machine step begins.
Frequently Asked Questions about KDA 3.1-150-3-DQD-W1:
Q: What cooling method does the KDA 3.1-150-3-DQD-W1 spindle drive use?
A: The KDA 3.1-150-3-DQD-W1 utilizes a mounted heatsink blower for forced cooling to manage temperature during operation.
Q: What is the rated current for the KDA 3.1-150-3-DQD-W1 spindle drive?
A: This spindle drive operates with a rated current of 150 A to support high-power spindle applications.
Q: What DC supply voltage does the KDA 3.1-150-3-DQD-W1 require?
A: The KDA 3.1-150-3-DQD-W1 supports a DC supply voltage of 300 VDC.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-DQD-W1 spindle drive?
A: It can be installed at elevations up to 1000 meters above sea level without derating.
Q: How does the KDA 3.1-150-3-DQD-W1 receive its speed command value?
A: The speed command value is processed digitally via a 16-bit parallel input on this model.
