KDA 3.1-150-3-AP0-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-AP0-W1 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 and is designed to operate in ambient temperatures from 5 to 45 degrees Celsius. The unit includes a second encoder input for spindle or additional motor feedback and supports analog speed command values.
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Product Description:
The KDA 3.1-150-3-AP0-W1 spindle drive is produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. It interfaces with a central power supply and converts the shared DC-link energy into regulated three-phase output for high-speed machine-tool spindles, enabling rapid acceleration, controlled braking, and precise speed holding across demanding metal-cutting or grinding applications. This operating role helps the spindle maintain stable rotation during speed changes and varying cutting loads, which is important for consistent machining results. Because the power stage is supplied from a shared DC bus, it fits machine platforms where several axes draw energy from a common source and braking energy is managed at the system level.
The drive accepts a DC link of 300 VDC, and its power electronics are dimensioned for continuous armature delivery of 150 A, letting the attached spindle generate high torque during rapid cycles. Thermal management relies on a heat sink-mounted blower that pulls air through aluminum fins fixed to the converter. That blower is supplied from an auxiliary line rated at 220 V/50-60 Hz and operates in forced cooling mode, which helps keep semiconductor temperatures under control during uninterrupted duty. Version 3 of the series also provides a second encoder socket that can accept spindle feedback or an additional motor encoder, supporting orientation and synchronized motion functions without extra external hardware.
Permitted ambient conditions range from 5 to 45 degrees Celsius, and installation altitude is limited to 1000 m above sea level. Speed reference arrives as an analog command value, allowing the unit to follow host CNC voltage signals without a digital fieldbus card. This arrangement suits control systems that send simple speed references rather than network-based commands. The control board has no additional interface option installed, so field devices connect directly to the terminal strip without protocol converters. Lower air density at higher elevations reduces heat transfer, so the altitude limit should be observed during cabinet layout and machine placement.
Frequently Asked Questions about KDA 3.1-150-3-AP0-W1:
Q: What is the rated current for the KDA 3.1-150-3-AP0-W1 spindle drive?
A: The KDA 3.1-150-3-AP0-W1 spindle drive operates with a rated current of 150 A.
Q: What cooling method is used in the KDA 3.1-150-3-AP0-W1 spindle drive?
A: This model uses a mounted heatsink blower for cooling, providing forced air cooling.
Q: What is the DC supply voltage requirement for the KDA 3.1-150-3-AP0-W1?
A: The spindle drive operates at a DC supply voltage of 300 VDC.
Q: What voltage is needed for the heatsink blower on the KDA 3.1-150-3-AP0-W1?
A: A 220V AC power source at 50-60Hz is required for the heatsink blower.
Q: What type of speed command input does the KDA 3.1-150-3-AP0-W1 support?
A: This model accepts an analogue speed command value for controlling spindle speed.
