KDA 2.1-150-3-AYI-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-AYI-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and operates on a 300 VDC supply voltage. It features forced cooling using a mounted heatsink blower powered by a 115V AC source and supports incremental encoder output with a second encoder input available. The drive is suitable for installation at elevations up to 1000 meters above sea level and functions in ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 2.1-150-3-AYI-U1 spindle drive is built by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a closed-loop power module, it regulates three-phase induction or synchronous spindle motors in machine tools, providing controlled torque and speed for cutting, drilling, and grinding operations within automated production lines. This arrangement supports stable spindle control during speed changes and varying cutting loads, which is important in machine tools that alternate between acceleration, constant-speed machining, and rapid deceleration.
It operates from a DC bus of 300 VDC, drawn from the common supply section, and can deliver up to 150 A of continuous output current to the motor windings. Speed reference enters the control card as an analog speed command, allowing proportional regulation from external CNC controllers. Thermal energy created by switching devices is removed through a mounted heat sink blower that pushes air directly across the fin stack, and the airflow path uses forced cooling to keep component temperatures below their limit. The blower itself is powered by a separate 115 V/50–60 Hz single-phase source so cooling can remain active even when the DC link is not energized.
The unit can be installed in enclosures where ambient air remains between 5 °C and 45 °C, and performance figures are guaranteed up to 1000 m above sea level before any output reduction is necessary. For position feedback distribution to downstream controllers, an incremental encoder output is available alongside a second encoder and synchronous input, enabling accurate spindle orientation and dual-loop setups. These interface signals support coordinated motion with related machine functions, including synchronized positioning with tool changers or other axes that depend on timing from the spindle channel.
Frequently Asked Questions about KDA 2.1-150-3-AYI-U1:
Q: What is the rated current capacity of the KDA 2.1-150-3-AYI-U1 spindle drive?
A: This model operates with a rated current of 150 A, making it suitable for applications requiring high power outputs.
Q: What cooling mechanism is used in the KDA 2.1-150-3-AYI-U1 spindle drive?
A: The KDA 2.1-150-3-AYI-U1 uses a mounted heatsink blower to provide forced cooling during operation.
Q: What voltage and frequency does the heatsink blower of the KDA 2.1-150-3-AYI-U1 require?
A: The AC source required for the heatsink blower is 115V with a frequency of 50-60Hz.
Q: What type of additional interface is available on the KDA 2.1-150-3-AYI-U1?
A: This model supports incremental encoder output as an additional interface for feedback or synchronization.
Q: What is the ambient temperature operating range for the KDA 2.1-150-3-AYI-U1 spindle drive?
A: The ambient temperature range for safe operation is between 5 to 45 degrees Celsius.
