Product Description:

Bosch Rexroth Indramat created the DKC03.3-LK-PBK02, a member of the DKC Drive Controllers series. As an EcoDrive unit, it regulates three-phase servo motors by converting mains power into a variable output matched to commanded torque and speed. In automated handling lines, packaging stations, and CNC axes, the controller supplies closed-loop current and velocity regulation so mechanical stages follow programmed motion with repeatable accuracy. Its housing and connectors mount directly in a control cabinet.

The controller’s logic and I/O circuits draw 24 V DC from an external supply, and isolating control power this way keeps the drive responsive during line faults while allowing fieldbus communication to stay active when the main bus is disabled. Its mains input window accepts line variations within ±10% of nominal voltage, so plant power dips or surges are tolerated without triggering a fault. Internally, the inverter can elevate the DC link and deliver up to 800 V to the motor terminals, enabling long-cable installations or high back-EMF machines. The unit synthesizes a symmetrical, sinusoidal output across 3 phases, and pulse-width modulation is updated fast enough to support a commanded bandwidth of 1000 Hz, which is useful for high-speed spindle or pick-and-place axes that require finely stepped velocity profiles.

Line quality limits are further handled by an input frequency window, and the drive remains in regulation as long as mains drift does not exceed 2 Hz, preventing nuisance trips when generators or weak grids are present. The product is identified as design version 3, which means the component placement and thermal paths follow the third mechanical iteration. Communication flexibility is expanded by interface option 03, allowing the LK front end to link with Profibus-DP networks for centralized motion commands. The controller carries the EcoDrive product classification, indicating compatibility with energy-recovering DC bus modules that can help reduce cabinet heat.