KDA 3.1-150-3-LPI-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-150-3-LPI-W1 is a spindle drive from the KDA Spindle Drives series, designed for forced cooling with a mounted heatsink blower operating at 220V and 50-60Hz. This drive features a rated current of 150 Amps, a DC supply voltage of 300 VDC, and supports incremental encoder output and SERCOS interface for speed command values.
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Product Description:
The KDA 3.1-150-3-LPI-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a closed-loop spindle drive, it regulates torque and speed for high-speed machining spindles by converting common DC-bus energy into a controlled three-phase output. The control platform links directly to motion controllers, allowing coordinated spindle positioning during tool changes and constant-surface-speed cutting operations within CNC and general automation lines. In multi-axis cabinets, it operates from a shared power architecture, which reduces the need for a separate spindle power source and keeps spindle control integrated with the rest of the drive system. This helps the spindle respond smoothly to changing load conditions during acceleration, deceleration, and steady operation.
This version handles a nominal output of 150 A while drawing power from a 300 VDC intermediate circuit. Thermal energy is removed by a mounted heat sink blower, and air is driven across the aluminum fins by forced cooling so the drive can deliver full current without derating. The blower itself accepts an auxiliary supply of 220 V/50-60 Hz, which keeps heat removal separate from the main DC-bus power path. Velocity references reach the regulator through the SERCOS interface, enabling synchronized setpoint updates and diagnostic feedback in distributed control architectures. Because the cooling air is directed over the heat sink rather than through the control section, thermal loading can be managed without changing the electrical control path. This arrangement supports stable spindle regulation during rapid speed changes and sustained machining duty.
Operation is permitted in ambient temperatures from 5 to 45 °C and at installation altitudes up to 1000 m above sea level without performance adjustment. For downstream position controllers, the drive retransmits actual speed through an incremental encoder output, which supports phase alignment in multi-device systems. A second encoder input is available for spindle or auxiliary motor feedback, extending closed-loop regulation to an external axis when required. These feedback paths allow higher-level controls to monitor spindle behavior while coordinating it with related machine motion.
Frequently Asked Questions about KDA 3.1-150-3-LPI-W1:
Q: What is the required power supply for the heatsink blower on the KDA 3.1-150-3-LPI-W1 spindle drive?
A: The KDA 3.1-150-3-LPI-W1 requires a heatsink blower powered by a 220V AC source operating at 50-60Hz.
Q: What is the rated current output of the KDA 3.1-150-3-LPI-W1 spindle drive?
A: This spindle drive supports a rated output current of 150 A for demanding spindle applications.
Q: What cooling method does the KDA 3.1-150-3-LPI-W1 use?
A: The cooling system uses a mounted heatsink blower with forced cooling to maintain optimal operational temperatures.
Q: What is the maximum installation elevation for the KDA 3.1-150-3-LPI-W1 spindle drive?
A: Installation of the KDA 3.1-150-3-LPI-W1 is permitted up to a maximum elevation of 1000 meters above sea level.
Q: Which interface is used for speed command input on the KDA 3.1-150-3-LPI-W1?
A: A SERCOS interface is used for the speed command value on this spindle drive.
