Product Description:

The KDA 2.1-100-3-AYD-W1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. As a closed-loop power module, it supplies regulated current to high-speed spindle motors while exchanging velocity and position data with the machine controller. By converting direct current from the link into three-phase output, the unit supports precise speed regulation in metal-cutting and similar automation tasks. This control method helps the spindle respond quickly to changing load conditions during acceleration, steady running, and commanded orientation. In machine tools, that behavior is useful for operations that need repeatable speed control and accurate stopping at a requested angular position.

The power section is energized from a DC link rated at 300 VDC, and it can deliver a continuous output of 100 A to the motor windings. A dedicated blower mounted on the heat sink uses an auxiliary supply of 220 V / 50-60 Hz, so the cooling circuit remains independent of spindle demand. The drive uses forced cooling, which removes heat directly from the power section instead of depending only on cabinet airflow. Speed reference arrives as an analog command, allowing proportional control from conventional CNC outputs without extra signal conversion. Separate blower power also helps maintain cooling when spindle current changes rapidly during repeated acceleration and deceleration, which is common in production cycles with frequent speed changes.

The electronic section operates in ambient temperatures from 5 to 45 °C, and installation is permitted up to 1000 m above sea level without derating. Motion feedback options include second encoder input and synchronous input, which support dual-encoder arrangements for spindle orientation and speed matching. For position loops executed outside the drive, a digital position command value interface is available to coordinate incremental moves with external motion controllers. That setup allows the spindle to work with control systems that manage positioning logic at the machine level rather than inside the drive. The drive is in series 2, and its signal arrangement suits applications that alternate between continuous rotation, synchronized motion, and indexed positioning during the same operating sequence.