KDA 3.1-050-3-AYD-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-AYD-U1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 50 Amps and uses a 300 VDC supply voltage. The drive is cooled by a mounted heatsink blower with forced cooling and can operate in ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 3.1-050-3-AYD-U1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. Designed for machine tool automation, this drive converts a regulated DC link into three-phase power so a spindle motor can maintain commanded speed and torque during cutting, drilling, or grinding cycles. Integration with modular drive racks lets the unit share a common supply and feedback bus, which helps reduce cabinet wiring in multi-axis systems. The drive is intended for applications where stable spindle control supports consistent machining performance under changing load conditions.
Its internal power stage is energized by 300 VDC from the shared supply, and it can deliver a continuous phase current of 50 A to the connected spindle. A mounted heat-sink blower removes switching losses, and the blower is fed from an auxiliary line of 115V/50-60 Hz. Because airflow is directed through fin channels rather than relying on natural convection, the unit uses forced cooling. Motion feedback flexibility is extended by a second encoder input and a synchronous input, allowing dual-resolver or encoder combinations for high-precision positioning and coordinated spindle control.
The drive maintains its ratings at ambient temperatures from 5 to 45 °C and at installation sites up to 1000 m above sea level, provided the heat-sink blower remains unobstructed. Digital spindle-position exchange is available through a digital position command value channel, while the velocity reference can arrive as an analog signal for compatibility with legacy CNC controllers. This combination allows the unit to work with both digital position paths and conventional speed-reference methods in the same machine environment. It also supports installations where the control system uses different signal formats for spindle coordination and speed regulation.
Frequently Asked Questions about KDA 3.1-050-3-AYD-U1:
Q: What cooling method does the KDA 3.1-050-3-AYD-U1 spindle drive use?
A: The KDA 3.1-050-3-AYD-U1 utilizes a mounted heatsink blower for forced cooling.
Q: What is the rated current capacity of the KDA 3.1-050-3-AYD-U1 drive?
A: This model supports a rated current of 50 A to handle high-power spindle operations.
Q: What is the required AC source for the heatsink blower on this spindle drive?
A: The AC source for the heatsink blower is specified at 115V, 50-60Hz.
Q: Does the KDA 3.1-050-3-AYD-U1 include provisions for a second encoder input?
A: A second encoder input and synchronous input are included to enhance control and feedback options.
Q: What is the ambient temperature range for operating the KDA 3.1-050-3-AYD-U1 safely?
A: The allowed operating temperature range for this unit is between 5 and 45 degrees Celsius.
