KDA 3.1-150-3-LYI-U1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 3.1-150-3-LYI-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and a DC supply voltage of 300 VDC. It features forced cooling with a mounted heatsink blower powered by a 115V AC source and operates within an ambient temperature range of 5 to 45 degrees Celsius. This drive supports SERCOS interface for speed command and includes an incremental encoder output along with a second encoder input for enhanced feedback options.
Internal Product Review
The KDA 3.1-150-3-LYI-U1 spindle drive from Bosch Rexroth Indramat features a forced cooling system with a mounted heatsink blower operating at 115V/50-60Hz, ensuring reliable thermal management in demanding environments. Its rated current of 150 A and SERCOS speed command interface make it suitable for high-performance spindle applications. This drive stands out for its advanced encoder support and stable operation.
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Product Description:
The KDA 3.1-150-3-LYI-U1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It converts DC-link energy from a shared supply into controlled three-phase power while processing spindle feedback for closed-loop regulation. This arrangement supports spindle control in automated machining equipment where stable speed and coordinated response are required during changing load conditions. By combining the power section and control functions in one housing, the unit reduces the need for separate modules and helps keep cabinet layouts compact.
The drive’s power section is rated for a continuous output of 150 A, allowing it to supply large-frame motor windings without thermal derating during normal operation. A DC bus of 300 VDC feeds the output stage, and velocity commands are transmitted through the SERCOS interface for deterministic communication between the drive and the higher-level control system. Thermal energy is removed by forced cooling, and the integrated heatsink blower moves air through the cooling fins to stabilize semiconductor temperature during sustained spindle demand. That blower is powered by an auxiliary supply of 115 V/50–60 Hz, so the airflow source remains separate from the main DC bus used by the power electronics.
Reliable operation is specified at ambient temperatures from 5 to 45 °C, and the installation altitude is limited to 1000 m above sea level so reduced air density does not interfere with cooling performance. For position-synchronized motion, the control board provides an incremental encoder output for downstream monitoring devices. It also includes a dedicated second encoder input for a spindle-mounted sensor and a phase-aligned synchronous signal. This feedback arrangement allows external monitoring hardware and synchronized machine functions to receive motion data without requiring separate signal splitters.
