KDA 3.1-100-3-DQ0-U1
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The Bosch Rexroth Indramat KDA 3.1-100-3-DQ0-U1 is part of the KDA Spindle Drives series and features a rated current of 100 Amps. This drive control module supports both resolver and encoder feedback, has an internal cooling fan, and operates on a 3-phase, 380–480 V AC main connection voltage. It has a protection class of IP20.
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Product Description:
Bosch Rexroth’s spindle drive KDA 3.1-100-3-DQ0-U1 is manufactured for CNC applications and it operate with 2AD asynchronous as well as with 1MB frameless motors. Its rated current at the output is 100 A and its continuous load capacity is specified as 70 A. This drive is built for a DC bus voltage that is fixed at 300 VDC.
The KDA 3.1-100-3-DQ0-U1 drive uses digital 16-bit parallel input for the speed command interface to provide precise speed reference of the connected spindle motor. It includes an auxiliary encoder input for motor feedback to support a second motor as well that allows the drive to operate in master slave spindle applications. The unit’s cooling system is based on forced air circulation via a blower unit that directs air through the external heatsink and the heatsink is mounted through the cabinet wall to release heat externally. The blower operates on 115 V AC supply and its airflow is rated around 32 liters/sec, while its pressure is measured as 30.0 Pa, with velocity between 3 - 4 m/s. The KDA 3.1 drive has a weight of about 17.1 kg and it mounts through a 1.7 kg mechanical mounting kit in vertical position with adequate clearance for effective heat exchange. It is rated IP10 according to DIN 40 050 standard and it supports protective, as well controlled environments for installation.
The KDA 3.1-100-3-DQ0-U1 drive’s requirement for control bus includes +24 V at 1.4 A and ±15 V at 160 mA, these supplies are necessary for control electronics and measurement functions. It uses the AS3 programming module for firmware and parameters for easy replacement or transfer between drives. The unit’s installation is permitted up to 1000 meters of altitude and its humidity classification follows DIN 40 040 class F.
Frequently Asked Questions about KDA 3.1-100-3-DQ0-U1:
Q: How does the digital 16-bit parallel speed command enhance performance?
A: The 16-bit parallel input provides high-resolution reference, enabling finer speed control and reduced jitter. It ensures smoother spindle RPM transitions for accurate machining.
Q: How does the blower-based cooling system benefit the KDA 3.1-100-3-DQ0-U1?
A: The forced air via the blower keeps the heatsink temperature stable under heavy load. This maintains performance and prevents thermal shutdowns during continuous operation.
Q: Why is a fixed 300 VDC bus used in the KDA 3.1-100-3-DQ0-U1?
A: A dedicated 300 VDC bus ensures consistent energy supply and efficiency. It simplifies power design and avoids fluctuations common in variable DC sources.
Q: How does the KDA 3.1-100-3-DQ0-U1 manage control electronics power requirements?
A: It integrates +24 V/1.4 A and ±15 V/160 mA supplies onboard for control circuitry and measurement. This reduces external power dependencies and simplifies wiring.
Q: Why is mounting with a mechanical kit significant for the KDA 3.1-100-3-DQ0-U1?
A: The 1.7 kg kit ensures secure vertical installation, optimizing clearance and airflow. Proper positioning enhances heat dissipation and prolongs unit lifespan.
