KDA 3.1-100-3-D0I-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-D0I-W1 is a spindle drive from the KDA Spindle Drives series with a rated current of 100 Amps and a DC supply voltage of 300 VDC. It uses a mounted heatsink blower for forced cooling and operates in ambient temperatures from 5 to 45 degrees Celsius. The drive features an incremental encoder output and accepts digital speed command values in 16 bit parallel format.
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Product Description:
The KDA 3.1-100-3-D0I-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it converts controlled DC bus energy into three-phase output for high-speed machine-tool spindles, while embedded control logic works with the CNC to regulate torque, acceleration, and braking during changes in speed and load. This arrangement supports stable spindle operation in machining processes that require consistent speed control and quick response to command changes. Because it is intended for spindle service rather than general axis motion, the drive is suited to applications where rotational speed, torque delivery, and controlled deceleration must stay coordinated with the machine program. The unit is part of hardware version 3 and fits installations that require integrated heat sink ventilation.
The drive uses a mounted heat sink blower. This fan is powered by an auxiliary supply of 220 V AC 50–60 Hz, so airflow remains available independently of the main power section. Main power reaches the converter through a 300 VDC bus from the cabinet rectifier, and continuous operation can draw up to 100 A, which sets the load on conductors, contactors, and protective fusing. Internal sensors monitor airflow and reduce torque if the required forced cooling level is not maintained, helping protect the power section during low-speed spindle operation. Independent blower power also allows cooling to continue during bus transitions or when spindle speed is too low to create meaningful self-ventilation.
Reliable operation is permitted between 5 to 45 °C, so the drive can run in typical indoor industrial conditions without added thermal derating. Installation is allowed up to 1000 m above sea level, which covers most factory locations. For motion feedback routing, the control card provides an incremental encoder output that mirrors spindle position to external control hardware, while speed commands are accepted as a digital 16-bit parallel word for direct CNC interfacing. The design omits a secondary encoder input, which leaves the interface focused on single-channel feedback and keeps cabinet wiring straightforward.
Frequently Asked Questions about KDA 3.1-100-3-D0I-W1:
Q: What type of cooling does the KDA 3.1-100-3-D0I-W1 spindle drive use?
A: This drive is equipped with a forced cooling system utilizing a mounted heatsink blower for heat dissipation.
Q: What is the rated current of the KDA 3.1-100-3-D0I-W1 spindle drive?
A: The rated current for the KDA 3.1-100-3-D0I-W1 spindle drive is 100 A.
Q: What DC supply voltage is required for the KDA 3.1-100-3-D0I-W1?
A: This model operates with a DC supply voltage of 300 VDC.
Q: What is the required AC source specification for the heatsink blower on this drive?
A: A 220V AC power source with a frequency of 50-60Hz is needed for the heatsink blower.
Q: What type of speed command value does the KDA 3.1-100-3-D0I-W1 accept?
A: The KDA 3.1-100-3-D0I-W1 supports a digital speed command value with 16 bit parallel input.
