KDA 2.1-050-3-AYS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-050-3-AYS-W1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 50 A and uses a DC supply voltage of 300 VDC. The drive features a forced cooling system with a mounted heatsink blower and has a serial interface RS 232 C.
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Product Description:
Bosch Rexroth Indramat manufactures the KDA 2.1-050-3-AYS-W1 as part of its KDA Spindle Drives series. This spindle drive converts regulated DC bus energy into variable three-phase outputs for high-speed machining spindles, giving CNC controllers closed-loop speed and torque regulation. Within an automation cell it links the main power supply to the spindle motor and transmits feedback to the motion controller, allowing coordinated tool changes and contouring operations on milling or grinding equipment.
The unit accepts a DC link of 300 VDC, and its power stage is rated for 50 A, so the connected spindle can draw substantial acceleration current without triggering overcurrent faults. Control electronics derive cooling air from an external source that is energized by an auxiliary blower supply of 220 V 50/60 Hz; this dedicated supply keeps the heatsink airflow independent from the main bus so thermal protection remains active during line disturbances. Command data enter the drive through an RS-232 C serial port, simplifying parameter uploads from the numerical controller during setup. The velocity loop receives its reference as an analog signal, which is filtered internally to 12-bit resolution for fine speed trimming. A second encoder input with synchronous capture allows phase-aligned feedback from an auxiliary position transducer, letting the spindle share a common master clock with rotary axes.
Thermal management relies on a heat sink-mounted blower that pushes air directly across the power semiconductor fins; in conjunction with forced cooling it allows the converter to maintain full current even at an ambient of 5 to 45 °C. Installation is specified for sites up to 1000 m above sea level, so standard convection coefficients and partial pressures were considered when sizing the blower and heatsink. The available second encoder and synchronous inputs remain operational across the stated temperature span, ensuring position capture accuracy while the drive receives periodic airflow from the dedicated fan circuit.
Frequently Asked Questions about KDA 2.1-050-3-AYS-W1:
Q: What type of cooling does the KDA 2.1-050-3-AYS-W1 spindle drive use?
A: The KDA 2.1-050-3-AYS-W1 spindle drive uses a forced cooling system with a mounted heatsink blower.
Q: What is the rated current of the KDA 2.1-050-3-AYS-W1 spindle drive?
A: The rated current for this spindle drive model is 50 A.
Q: What is the required DC supply voltage for the KDA 2.1-050-3-AYS-W1?
A: This drive operates with a DC supply voltage of 300 VDC.
Q: Does the KDA 2.1-050-3-AYS-W1 support a second encoder input?
A: The KDA 2.1-050-3-AYS-W1 supports a second encoder input as well as a synchronous input.
Q: What is the maximum installation elevation for the KDA 2.1-050-3-AYS-W1 spindle drive?
A: This drive can be installed at elevations up to 1000 meters above sea level.
