Product Description:

The KDA 3.1-150-3-DQ0-W1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. As a spindle drive, it converts DC bus power into controlled three-phase output for high-speed machining spindles used in CNC and other automated equipment. This allows the spindle motor to respond quickly to commanded speed changes during drilling, milling, and contouring operations. The module forms part of the machine's drive chain, receiving velocity references from numerical controllers and regulating motor torque through closed-loop current control.

Internally, the drive draws its DC link from a common supply at 300 VDC, providing the energy reservoir for the output inverter section. Under continuous operation, it can furnish up to 150 A of phase current, which is suitable for sizable spindle motors that require high acceleration torque. Thermal management relies on a mounted heat sink blower that pushes air directly across the power module. This arrangement works with the unit's forced cooling design to keep semiconductor temperatures within safe limits during heavy cutting cycles. The blower itself is energized by an auxiliary line of 220 V/50-60 Hz, allowing the unit to use standard single-phase mains without secondary converters or transformers. The unit is in series 3.

The operating temperature range is 5 to 45 degrees Celsius, accommodating most production floors without external climate control. Installation is permitted up to 1000 m above sea level before altitude correction factors become necessary, helping maintain predictable heat dissipation at standard elevations. For motion commands, the unit accepts a digital speed reference over a 16-bit parallel bus, enabling lossless handshaking with Bosch Rexroth Indramat CNC processors. The design includes no additional interface option, so wiring is limited to the predefined control, power, and blower connectors, which keeps the connection layout straightforward.