Product Description:

The KDA 3.2-050-3-LP0-W1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed to control high-speed machining spindles, the unit converts regulated DC bus energy into three-phase motor power while providing closed-loop velocity regulation. Within an automated cell, it interfaces with the machine control to deliver the commanded spindle speed, respond to process changes, and maintain torque stability during cutting, drilling, or grinding operations.

For power conversion, the drive operates from a DC bus of 300 VDC, enabling direct connection to Indramat supply modules without an intermediate transformer. Its output stage is rated for 50 A, allowing it to support medium-frame induction or synchronous spindle motors that draw substantial current during acceleration and changing load conditions. Thermal energy is removed by a heat sink-mounted blower, so the amplifier can sustain continuous operation in enclosures with limited natural airflow. The blower motor is powered from an auxiliary line of 220 V/50–60 Hz, eliminating the need for an additional low-voltage supply. Electronic components are qualified for an ambient range of 5 to 45 °C, and operation outside that range may require derating.

The cooling assembly pushes air across fin surfaces in forced cooling mode, which helps maintain thermal performance at installation altitudes up to 1000 m above sea level. Spindle velocity references enter the controller over a SERCOS interface, allowing synchronous motion commands to be exchanged with CNC systems on a single fiber-optic ring. For applications that demand precise position orientation, a second encoder input accepts either spindle or auxiliary motor feedback so the drive can process angle data independently of the main channel.