KDA 3.1-150-3-L0D-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-L0D-W1 is part of the KDA Spindle Drives series and is designed as a spindle drive with a rated current of 150 Amps. It features forced cooling with a mounted heatsink blower powered by a 220V AC source and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive supports digital position command values and SERCOS interface for speed command.
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Product Description:
The KDA 3.1-150-3-L0D-W1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed for industrial machine tools, the module regulates spindle acceleration, speed, and braking torque by modulating the three-phase output provided to a matched asynchronous or synchronous motor. Integrated control logic interprets motion commands from the CNC controller, while the power electronics deliver the necessary current to sustain continuous cutting loads and rapid traverses common in high-precision machining centers. This arrangement supports stable spindle response during drilling, milling, and tapping operations where load can change quickly.
It accepts a DC link voltage of 300 VDC, so the upstream supply or regenerative bus must remain at that level for proper modulation range. The power stage is rated to deliver up to 150 A of continuous current, allowing it to drive large-frame spindles without derating during heavy cuts. An internal blower is fed from a single-phase source of 220 V/50–60 Hz, and this auxiliary circuit keeps the heat sink within safe limits regardless of cabinet airflow. Reliable operation is specified from 5 °C to 45 °C, giving the unit enough margin for typical shop floor temperature swings. Cooling air is drawn directly across the fin stack by the mounted heat sink blower, which helps limit thermal gradients across the power semiconductors.
Heat removal follows a forced cooling profile, so installation must provide an unobstructed exhaust path to avoid recycling warm air. Performance data remain valid up to 1000 m above sea level; beyond that altitude, reduced air density can lower blower efficiency and may require derating. For motion integration, the drive outputs position data through a digital position command value channel and accepts velocity setpoints over a SERCOS interface, allowing coordinated communication with the control system. This interface combination supports synchronized spindle behavior with axis motion in coordinated machine control. The absence of a second encoder input means the drive supports a single feedback loop for standard spindle architectures.
Frequently Asked Questions about KDA 3.1-150-3-L0D-W1:
Q: What is the rated current of the KDA 3.1-150-3-L0D-W1 spindle drive?
A: The KDA 3.1-150-3-L0D-W1 operates with a rated current of 150 A.
Q: How is the KDA 3.1-150-3-L0D-W1 spindle drive cooled?
A: This model uses a mounted heatsink blower for forced cooling.
Q: What is the DC supply voltage for the KDA 3.1-150-3-L0D-W1 spindle drive?
A: The KDA 3.1-150-3-L0D-W1 manages a DC supply voltage of 300 VDC.
Q: What type of position command value interface is available on the KDA 3.1-150-3-L0D-W1?
A: This spindle drive supports position command value input via a digital interface.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-L0D-W1 spindle drive?
A: The KDA 3.1-150-3-L0D-W1 supports installation elevations up to 1000 meters above sea level.
