KDA 3.1-150-3-DQS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-DQS-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 by a mounted heatsink blower and operates within ambient temperatures of 5 to 45 degrees Celsius. The drive includes a serial RS 232 C interface and accepts digital speed command values with 16 bit parallel input.
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Product Description:
The KDA 3.1-150-3-DQS-W1 is a spindle drive unit built by Bosch Rexroth Indramat for the KDA Spindle Drives series. Designed for machine-tool applications, the drive converts direct-current bus energy into three-phase output for high-speed motor spindles and supplies feedback data to the supervisory CNC system. It handles acceleration, braking, and speed regulation, allowing automated machining centers to maintain repeatable cutting speeds while protecting motors from overload. In a typical spindle system, the unit works between the DC supply stage and the motor so commanded speed changes can be applied quickly and smoothly. It is intended for production equipment that relies on stable spindle behavior during cutting passes, tool changes, and other automated machining steps.
The power section of the drive operates from a bus link of 300 VDC. Its output stage is rated for 150 A continuous current, so connected spindles can draw substantial torque during rapid material removal. Speed reference data arrives over a 16-bit digital parallel channel, giving 65,536 discrete velocity commands for fine control. This command path lets the CNC update speed requests with very fine resolution during ramps and process changes. Internal electronics and switching elements are stabilized by forced cooling, and the dedicated heatsink blower draws its supply from 220 V at 50/60 Hz, which separates fan power from the DC link.
A mounted heatsink blower fixed to the rear panel directs airflow across the IGBT modules. This keeps junction temperatures within an ambient range of 5 to 45 °C without derating. The rear-mounted airflow path reduces heat buildup around the power semiconductors during long spindle runs. Configuration and status messages can be exchanged through the RS-232C serial interface, enabling parameter transfer or online diagnostics from a host controller. Installation is permitted up to 1000 m above sea level, and the unit is Series 3. This arrangement supports use in enclosed control cabinets where stable thermal performance and accessible communication are needed.
Frequently Asked Questions about KDA 3.1-150-3-DQS-W1:
Q: What is the rated current capacity of the KDA 3.1-150-3-DQS-W1 spindle drive?
A: The KDA 3.1-150-3-DQS-W1 drive supports a rated current of 150 A, enabling it to control high-power spindles.
Q: How is the KDA 3.1-150-3-DQS-W1 spindle drive cooled?
A: This model utilizes forced cooling with a mounted heatsink blower for reliable thermal management.
Q: What additional interface is provided on the KDA 3.1-150-3-DQS-W1 spindle drive?
A: A serial interface (RS 232 C) is available on the KDA 3.1-150-3-DQS-W1 for device communication.
Q: What is the required DC supply voltage for the KDA 3.1-150-3-DQS-W1?
A: The accepted DC supply voltage for this model is 300 VDC.
Q: What type of speed command input does the KDA 3.1-150-3-DQS-W1 spindle drive use?
A: Digital speed command inputs are supported using a 16 bit parallel format.
