KDA 2.1-150-3-LYI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-LYI-W1 is a spindle drive from the KDA Spindle Drives series. It features a rated current of 150 Amps and operates with a DC supply voltage of 300 Volts. The drive uses a mounted heatsink blower for forced cooling and supports a SERCOS interface for speed command values.
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Product Description:
The KDA 2.1-150-3-LYI-W1 is a spindle drive built by Bosch Rexroth Indramat for the KDA Spindle Drives series. As a spindle drive, it regulates torque and speed on high-speed machining spindles and routes command data from CNC controllers into controlled three-phase motor power. The unit is in Series 2 and uses a forced-air cooling design that draws ambient air through a dedicated heat sink blower to keep the power electronics within operating limits during continuous industrial operation. This cooling arrangement supports stable spindle response during sustained cutting cycles and rapid speed changes.
During normal duty, the drive can deliver a continuous output of 150 A, allowing it to energize large spindle motors without current foldback. Its internal power section is supplied from a regulated DC bus rated at 300 VDC, while auxiliary cooling power is taken from a separate 220 V at 50/60 Hz AC line that feeds the blower. The cooling hardware is an integrated mounted heat sink blower; paired with the drive's forced-air ducting, this arrangement removes switching and copper losses before they raise component temperatures. Velocity reference data arrives on the high-speed SERCOS interface, so the drive can be synchronized with other axes over a fiber-optic ring without analog drift. This interface also supports coordinated motion where spindle speed must track CNC commands closely.
Position feedback wiring is simplified by an optional incremental encoder output that mirrors the motor encoder to external process hardware and by a dedicated second encoder input that lets the controller read spindle orientation from a secondary scale for tool-change accuracy. Reliable performance is maintained from 5 to 45 °C, provided installation altitude does not exceed 1000 m above sea level. The synchronous input circuitry keeps both encoder channels and the SERCOS data word time-aligned during rapid spindle acceleration, which helps maintain consistent feedback processing. This is useful when the spindle must switch quickly between speed control and orientation tasks.
Frequently Asked Questions about KDA 2.1-150-3-LYI-W1:
Q: What is the rated current for the KDA 2.1-150-3-LYI-W1 spindle drive?
A: The KDA 2.1-150-3-LYI-W1 operates with a rated current of 150 A.
Q: What cooling method is implemented in the KDA 2.1-150-3-LYI-W1 spindle drive?
A: It uses a forced cooling system with a mounted heatsink blower to manage thermal conditions.
Q: What AC supply is needed for the heatsink blower in the KDA 2.1-150-3-LYI-W1?
A: The AC source required for the heatsink blower is 220V at 50-60Hz.
Q: What type of additional interface does the KDA 2.1-150-3-LYI-W1 offer?
A: An incremental encoder output is provided as an additional interface on this model.
Q: Which interface delivers the speed command value for the KDA 2.1-150-3-LYI-W1?
A: The speed command value for this spindle drive is set via the SERCOS interface.
