KDA 3.1-050-3-DYI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-DYI-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 features forced cooling using a mounted heatsink blower and supports a digital 16-bit parallel speed command value. The drive operates within an ambient temperature range of 5 to 45 degrees Celsius and includes interfaces for both incremental encoder output and a second encoder input.
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Product Description:
The KDA 3.1-050-3-DYI-W1 is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It is a dedicated inverter module for regulating speed and torque of high-speed machine-tool spindles, converting shared DC-bus energy into the controlled three-phase output required for precise metal-cutting and drilling applications. It interfaces directly with Indramat digital control loops through standardized bus bars. This layout supports spindle applications that need stable speed regulation during cutting passes and repeatable response to CNC commands.
The drive operates from a DC bus of 300 VDC, allowing it to share a common supply with other axis controllers. Its continuous output capability is 50 A, so the control loop can support medium-power spindle motors without saturation. The heat sink blower is powered by an auxiliary 220 V/50–60 Hz single-phase source, so ventilation can remain active during DC-link faults or shutdowns. Speed references are accepted as a 16-bit digital parallel word, eliminating conversion delays between the CNC and the drive. Thermal management relies on forced cooling, provided by the frame-mounted fan, to keep internal semiconductor junctions within safe limits during rapid acceleration and deceleration cycles. This arrangement helps the module respond quickly to commanded speed changes while maintaining consistent airflow across the power section.
The permitted operating range is 5 to 45 °C, so cabinet climates outside this band need supplemental conditioning. Installation is permitted up to 1000 m above sea level without derating; above that height, the load must be reduced because thinner air removes less heat. For feedback distribution, the control card provides an incremental encoder output, enabling downstream controllers to monitor spindle position from the same transducer. A dedicated port also provides a second encoder input and a synchronous input, permitting redundant feedback or phase-locked operation with another axis during turning, grinding, or tapping processes.
Frequently Asked Questions about KDA 3.1-050-3-DYI-W1:
Q: What is the rated current capacity of the KDA 3.1-050-3-DYI-W1 spindle drive?
A: The KDA 3.1-050-3-DYI-W1 operates with a rated current of 50 A.
Q: What type of cooling system is used in the KDA 3.1-050-3-DYI-W1?
A: This model features forced cooling using a mounted heatsink blower.
Q: How is the speed command value set on the KDA 3.1-050-3-DYI-W1 spindle drive?
A: The KDA 3.1-050-3-DYI-W1 supports a digital speed command value with 16-bit parallel input.
Q: What is the operating temperature range for the KDA 3.1-050-3-DYI-W1?
A: The allowable ambient temperature range is 5 to 45 degrees Celsius.
Q: What is the required DC supply voltage for the KDA 3.1-050-3-DYI-W1?
A: This unit operates with a DC supply voltage of 300 VDC.
