KDA 3.1-100-3-A0I-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-A0I-U1 is part of the KDA Spindle Drives series. It is a spindle drive with a rated current of 100 Amps and uses a 300 VDC supply voltage. The drive features a forced cooling system via a mounted heatsink blower and supports an incremental encoder output.
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Product Description:
The KDA 3.1-100-3-A0I-U1 is a drive unit manufactured by Bosch Rexroth Indramat for the KDA Spindle Drives series. It is intended to regulate high-speed cutting or grinding spindles in automated machinery, using an analog speed reference to control motor operation. The unit accepts a stabilized DC link from an upstream supply rather than taking power directly from the mains, which allows it to operate as part of a larger spindle drive system. This control method suits spindle applications that require stable speed regulation during changing process loads. The internal electronics correspond to series 3, and the housing includes a dedicated heat sink blower connection so thermal energy is removed during continuous-duty operation.
The drive draws power from a direct-current bus rated at 300 VDC and can deliver up to 100 A of output current to the spindle phases. A separate blower circuit supplied with 115 V/50–60 Hz energizes the cooling fan mounted on the rear of the mounted heat sink blower. This arrangement uses forced cooling, pushing ambient air across the fins so semiconductor junction temperatures remain within their limits when the controller carries its nominal load. The cooling layout supports sustained spindle service in applications where the power section is exposed to repeated load changes. It also helps maintain consistent thermal performance during long production runs.
The drive operates within an ambient range of 5 to 45 °C and may be installed up to 1000 m above sea level without derating. Speed reference signals reach the control electronics as an analog voltage. Position feedback can be routed outward through the integrated incremental encoder output, and a secondary encoder port is not provided. This interface arrangement supports systems that use an analog command path while still making encoder information available to external equipment. The combination of environmental limits and signal connections makes the unit suitable for integration into enclosed machine cabinets and retrofit spindle systems.
Frequently Asked Questions about KDA 3.1-100-3-A0I-U1:
Q: What is the allowable ambient temperature range for the KDA 3.1-100-3-A0I-U1 spindle drive?
A: The KDA 3.1-100-3-A0I-U1 is designed for operation in ambient temperatures from 5 to 45 degrees Celsius.
Q: What is the rated current capacity of the KDA 3.1-100-3-A0I-U1?
A: This drive provides a rated current output of 100 A for spindle applications.
Q: How is the KDA 3.1-100-3-A0I-U1 spindle drive cooled?
A: The KDA 3.1-100-3-A0I-U1 uses a mounted heatsink blower for forced cooling.
Q: What additional interface options are available on the KDA 3.1-100-3-A0I-U1?
A: An incremental encoder output is included as an additional interface on this model.
Q: What is the required DC supply voltage for the KDA 3.1-100-3-A0I-U1 spindle drive?
A: This model operates with a DC supply voltage of 300 VDC.
