Product Description:

The KDA 3.2-150-3-API-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it supplies regulated three-phase power to high-speed motor spindles so machining centers can maintain consistent cutting speeds under load during demanding machining cycles. Version 3.2 combines a main current stage with integrated cooling hardware, giving machine builders a compact controller for precision metalworking and woodworking applications, including milling and routing systems, that require coordinated speed loops.

The power section is energized from a DC bus at 300 VDC, allowing the unit to share common supply modules in multi-axis cabinets. Its continuous output is rated at 150 A, so the drive can accelerate large-diameter spindles without current foldback. The heat sink blower draws single-phase 220 V 50/60 Hz utility power, and the airflow is channeled directly across the IGBTs; this forced cooling method keeps junction temperatures stable during sustained duty. A mounted heatsink blower is already fitted, so no external fan tray is required. In addition to the primary encoder input, a second socket accepts spindle or auxiliary motor feedback, which lets the CNC use different feedback types for coarse positioning and fine speed control.

The drive operates in ambient air from 5 to 45 °C and can be installed up to 1000 m above sea level without derating. For process monitoring, the control card mirrors quadrature position data through an incremental encoder output, making signal observation easier on oscilloscopes or PLC counters. The mirrored signal can also feed external counters that track spindle motion independently of the main control loop. Speed references are accepted as an analog voltage, so retrofitting to older control systems that lack fieldbus capability is straightforward.