KDA 3.1-050-3-AQ0-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-AQ0-W1 is a spindle drive from the KDA Spindle Drives series with a rated current of 50 Amps and a DC supply voltage of 300 VDC. It uses forced cooling via a mounted heatsink blower powered by a 220V AC source and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive can be installed up to 1000 meters above sea level and utilizes analog speed command values.
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Product Description:
The KDA 3.1-050-3-AQ0-W1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a closed-loop power module, it supplies regulated current and velocity feedback to high-speed machine-tool spindles for cutting, drilling, and grinding under CNC control. This arrangement helps the spindle follow commanded speed changes with stable response during changing load conditions. It is intended for machine-tool applications that require repeatable spindle behavior across both low and high operating speeds. The hardware generation used in this unit adds broader diagnostic functions and finer tuning capability while staying compatible with earlier Indramat supply assemblies.
During operation, the drive supplies a continuous armature current of 50 A, giving connected spindle motors enough torque for rapid acceleration under load. Its converter connects to a shared DC link of 300 VDC, which allows energy exchange between axes and helps reduce peak line demand. Heat from the power section is removed by a finned heat sink and a blower powered by 220 V/50–60 Hz service power, so cooling remains independent of the DC bus. The unit uses forced cooling, so a clean cabinet air path is required and blocked filter mats can reduce cooling effectiveness. Rated performance is maintained when the surrounding air remains within 5 to 45 °C, which helps avoid condensation at low temperatures and excess thermal stress at higher temperatures.
The drive maintains full rating at installation heights up to 1000 m above sea level, so most industrial locations do not require derating. Spindle speed is commanded through an analog ±10 V reference, which supports direct connection to both older and newer CNC channels without requiring a digital fieldbus. The standard build has the lack of an additional interface option, so diagnostics and control signals pass through the main connectors. Cooling hardware is supplied as a mounted heat sink blower, which lets the module fit within its own panel width without requiring a separate fan tray or external duct. This layout keeps the thermal assembly on the drive and avoids the need for added cooling hardware elsewhere in the panel.
Frequently Asked Questions about KDA 3.1-050-3-AQ0-W1:
Q: What is the rated current of the KDA 3.1-050-3-AQ0-W1 spindle drive?
A: The KDA 3.1-050-3-AQ0-W1 spindle drive operates with a rated current of 50 A.
Q: What is the required DC supply voltage for the KDA 3.1-050-3-AQ0-W1?
A: This spindle drive requires a 300 VDC supply voltage for operation.
Q: What cooling method is used by the KDA 3.1-050-3-AQ0-W1 spindle drive?
A: The KDA 3.1-050-3-AQ0-W1 uses a mounted heatsink blower for forced cooling.
Q: What is the maximum permitted installation elevation for the KDA 3.1-050-3-AQ0-W1?
A: The drive can be installed at elevations up to 1000 meters above sea level.
Q: What type of speed command value does the KDA 3.1-050-3-AQ0-W1 spindle drive accept?
A: It accepts analogue speed command values for operational control.
