Product Description:

The DKC03.1-040-7-FW is an EcoDrive unit manufactured by Bosch Rexroth Indramat and supplied within the DKC Drive Controllers series. As a drive controller, it links the DC bus of a multi-axis system to individual servo motors and converts intermediate circuit energy into regulated phase currents. This supports positioning, speed, and torque control in automated assembly lines, packaging stations, and handling modules. It is used in coordinated motion systems where multiple axes share a common power structure while still requiring independent current control at each motor channel.

The controller is designed for a DC bus that operates at 700 V, and the internal power stage can deliver a peak motor current of 40 A during brief acceleration events. Energy buffering is provided by a bus capacitor rated at 0.15 mF, while the logic section keeps the control voltage ripple within 0.7% to maintain stable reference levels for its PWM output. When the unit operates at the rated switching frequency, its thermal losses amount to 180 W, so panel ventilation must remove this continuous heat. In continuous duty, the current limit is 16 A at a 4 kHz carrier frequency and 12.5 A at 8 kHz, which lets the system balance acoustic noise against current capability. Interface option 03 provides the required communication channels, and design code 1 indicates the first mechanical release.

A dedicated braking circuit dissipates regenerative energy through a bleeder resistor with a continuous rating of 0.15 kW and a short-term peak capacity of 10 kW, which helps prevent DC-bus overvoltage during rapid deceleration. The drive can accept returned energy pulses of as much as 5.0 kWs without exceeding its thermal limits, and the internal intermediate circuit stores 15 Ws to smooth short load changes. These values describe how the controller handles regenerated power and transient energy in multi-axis machines where several axes decelerate at the same time and short process disturbances occur.