KDA 2.1-150-3-LQS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-LQS-W1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 150 Amps and requires a DC supply voltage of 300 VDC. The drive uses forced cooling with a mounted heatsink blower and has a speed command value through a SERCOS interface.
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Product Description:
The KDA 2.1-150-3-LQS-W1 is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. Within machining centers and grinding lines, it governs synchronous or induction spindles, translating digital motion commands into regulated torque so that cutting speed stays constant under variable load and surface finish remains stable as cutting resistance changes. By housing the power stage, control logic, and cooling hardware in one frame, the unit reduces panel wiring and integrates with a shared drive bus in modular automation systems. This arrangement also keeps the spindle drive function concentrated in a single enclosure, which helps preserve cabinet space for companion motion modules.
The drive draws its DC link from a bus at 300 VDC, and its output stage delivers a continuous phase current of 150 A. This combination supports high electromagnetic power transfer to the spindle windings during demanding cutting conditions. Velocity reference comes through the SERCOS interface, allowing synchronized speed loops with other axes over a deterministic fiber-optic ring and supporting coordinated machine motion. A separate single-phase feeder rated at 220 V AC / 50–60 Hz energizes the heat sink fan, while forced cooling limits internal temperature rise during prolonged high-speed operation. Keeping the fan supply separate from the spindle power path also helps isolate the cooling circuit from load-current changes.
Reliable service is maintained between 5 to 45 °C, covering most shop floor climates without derating. Installation is permitted up to 1000 m above sea level, because reduced air density above that elevation affects heat removal. Parameter backup and diagnostics are available through a serial RS-232C port, providing a local communication path when network communication is unavailable. Physical heat removal is carried out by a mounted heat sink blower that projects exhaust away from adjacent modules, helping prevent recirculation inside dense cabinets. This airflow path helps keep neighboring equipment from drawing in reheated air.
Frequently Asked Questions about KDA 2.1-150-3-LQS-W1:
Q: What is the rated current for the KDA 2.1-150-3-LQS-W1 spindle drive?
A: The KDA 2.1-150-3-LQS-W1 spindle drive operates with a rated current of 150 A.
Q: How is the KDA 2.1-150-3-LQS-W1 spindle drive cooled?
A: This model uses a mounted heatsink blower for forced cooling to maintain optimal temperatures.
Q: What is the maximum installation elevation for the KDA 2.1-150-3-LQS-W1?
A: The KDA 2.1-150-3-LQS-W1 can be installed at elevations up to 1000 meters above sea level.
Q: What type of additional interface is available on the KDA 2.1-150-3-LQS-W1?
A: This drive features a serial interface (RS 232 C) for additional communication options.
Q: Which interface is used for the speed command value on the KDA 2.1-150-3-LQS-W1?
A: The speed command value for this spindle drive is handled via a SERCOS interface.
