KDA 2.1-150-3-DQ0-U1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 2.1-150-3-DQ0-U1 spindle drive is part of the KDA Spindle Drives series and operates with a rated current of 150 Amps and a DC supply voltage of 300 VDC. The unit features forced cooling with a mounted heatsink blower that runs on 115V and 50-60Hz, and supports a digital, 16-bit parallel speed command value. It is designed for operation in ambient temperatures from 5 to 45 degrees Celsius and can be installed up to 1000 meters above sea level.
Internal Product Review
The KDA 2.1-150-3-DQ0-U1 spindle drive from Bosch Rexroth Indramat delivers high performance with a rated current of 150 A and a DC supply voltage of 300 VDC. Forced cooling via a mounted heatsink blower and an ambient temperature range of 5 to 45 degrees Celsius support reliable operation in demanding environments. This model stands out for its digital 16-bit parallel speed command capability, making it a strong choice for precise spindle control.
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Product Description:
The KDA 2.1-150-3-DQ0-U1 spindle drive is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. Designed to regulate high-speed machining spindles, the unit converts controlled DC bus energy into the three-phase output required by induction or synchronous motors in CNC systems. Its internal control electronics accept digital speed references from the machine controller and adjust motor power accordingly. This allows the drive to control axis rotation and support tool cutting in automated production cells.
In operation, the drive provides a continuous output current of 150 A, a level suited to medium-to-large spindle motors where rapid acceleration and consistent torque are critical. The power stage is fed from a 300 VDC intermediate circuit, which supports multi-axis installations that share a common supply. Rotational demand reaches the drive through a digital (16-bit parallel) speed command, allowing fine resolution across the full speed range. Thermal energy generated in the power semiconductors is removed by forced cooling, which helps maintain predictable junction temperatures. A separate heatsink fan is energized from a 115 V/50–60 Hz source so blower loading does not burden the DC bus.
The drive can operate between 5 to 45 °C, covering typical factory conditions without extra conditioning. Installation is permitted up to 1000 m above sea level before power derating becomes necessary. The heatsink assembly uses a mounted heatsink blower that is factory-assembled to the rear of the drive, so only clearance and the specified fan supply are needed. There is no additional interface option on the control boards, so wiring is limited to the primary speed and feedback connectors. This keeps the connection layout straightforward inside standard spindle-drive cabinets.
