KDA 3.1-100-3-LQ0-U1
KDA Spindle Drives
The KDA 3.1-100-3-LQ0-U1 is a modular power unit produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. Installed in multi-axis cabinets, the unit conditions DC bus energy and feeds three-phase currents to a synchronous or induction spindle, allowing coordinated acceleration, deceleration, and continuous running under CNC control. By matching spindle torque to cutting demands, the module supports stable chip removal, surface finishing, and tool life management within automated milling, turning, and grinding equipment.
The drive operates from a link voltage of 300 VDC, and its power stage is rated for 100 A of continuous output current, allowing it to power large-frame spindles without derating. Thermal energy generated by the IGBT stack is removed through a Mounted Heatsink Blower that pushes air directly across the finned aluminum sink. This airflow is part of a Forced Cooling scheme and is energized by an auxiliary supply of 115V/50-60Hz, so cabinet designers must provide that single-phase source. Together, these electrical and thermal parameters define the drive’s continuous duty envelope and protect semiconductors from over-temperature conditions during prolonged high-speed cutting cycles.
For reliable service in production halls, the unit is specified for operation between 5 to 45 Degrees Celsius and at heights up to 1000M above sea level; outside these limits, current and speed commands must be derated. Speed setpoints enter through the SERCOS Interface, enabling deterministic time-slot communication with the motion controller and eliminating analog noise. Because this variant offers No Additional Interface Option, wiring and firmware resources are focused on the SERCOS channel, simplifying commissioning. These environmental and communication criteria allow the cabinet builder to integrate cooling air paths, EMC filtering, and fieldbus cabling while keeping the overall axis package compact.
Technical Specifications
AC Source for Heatsink Blower
115V/50-60Hz
AC Supply Source for Heatsink Blower
115 VAC
Additional Interfaces
No Additional Interface Option
Ambient Temp Range
5 to 45 Degrees Celsius
Aux. Encoder Input
With Aux. Encoder Input for 1V Sinusoidal Enc.
Aux. Interface
Without
Cooling
Mounted Heatsink Blower
Cooling Mode
Forced Cooling
DC Bus Voltage
300 V
DC Supply Voltage
300 VDC
Design
1
Max Installation Elevation
1000M above sea level
Product
KDA
Product Type
Spindle Drive
Rated Current
100 A
Series
3
Speed Command Value
SERCOS Interface
Common Misspellings
Shipping & Payment Options
Warranty
Repair
We offer a repair service for the KDA 3.1-100-3-LQ0-U1. Exchange
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