Product Description:

The KDF1.1-050-300-W1-115 is a variable frequency drive produced by Bosch Rexroth Indramat within the KDF Variable Frequency Drives series. As a closed-loop servo inverter, it modulates DC link energy into a three-phase output that controls synchronous or induction motors in automated machinery. The unit supplies adjustable speed and torque for conveyors, tool spindles, and handling axes. It can be used where coordinated motion requires both speed regulation and controlled acceleration. Closed-loop control helps the drive maintain stable response when machine load changes during a cycle.

The drive’s continuous output capability is set by a rated current of 50 A, delivered from a DC bus stabilized at 300 VDC. Analog reference values enter the controller through a differential analog channel that rejects common-mode noise, while discrete motion commands are accepted on a 16-bit parallel port for rapid set-point updates. Inside the control section, a digital microprocessor closes the velocity loop and generates PWM patterns that support rotor speeds up to 8000 rpm without losing synchronization. This combination allows the unit to process both continuous reference signals and fast command changes within the same control scheme.

A heat sink and blower provide forced ventilation, keeping semiconductor temperatures within limits during four-quadrant regeneration; the drive therefore supports energy flow in all 4 operating quadrants for forward, reverse, braking, and motoring. Absolute and relative positioning functions are available, removing the need for external indexers when only incremental moves are required. The unit can draw from a common DC link, which supports shared power supply operation and allows regenerated energy to be reused elsewhere in the system. Field wiring is simplified by the 16-pole X1 bus connector, which groups feedback, enable, and status lines in one keyed plug. Grouped connections also help keep interface routing orderly inside compact drive cabinets.