Product Description:

The DDC01.1-K050B-D is a digital intelligent servo drive produced by Bosch Rexroth Indramat within the DDC Digital Intelligent Servo Drives series. It regulates current and voltage delivered to a matched synchronous motor so closed-loop position, speed, and torque commands can be executed in automated machinery. This closed-loop operation supports repeatable axis movement in equipment that requires stable acceleration, controlled speed, and accurate stopping behavior. It is typically used as the power stage between a machine controller and a compatible servo motor.

The drive supplies an analog reference through a programmable output that can swing between ±10 V while delivering up to 4 mA to external controllers. Command logic is accepted on a 24 VDC interface, and the associated sink demand is 150 mA. Internally, the inverter section switches at a carrier frequency of 8 kHz, allowing smooth current regulation to the motor windings. Continuous and momentary load demands are both accommodated because the rated and peak output current are each specified at 50 A. Position information returns to the unit through digital servo feedback, and a minimum on-pulse width of 100 ms keeps the gating sequence stable during rapid load transitions. Natural convection across the heat sink surface removes 500 W of power loss during full-load operation without requiring forced-air cooling.

Excess DC-bus energy is dissipated by an internal bleeder rated for 0.25 kW, with short peaks handled by a separate 10 kW resistor so regenerative braking does not trip the upstream supply. The energy absorption ceiling before shutdown is 5 kWs, after which the controller isolates the bus to protect the power section. Protection against external surges is provided by an overvoltage cutoff at 475 V, and a Ud threshold of 200 V helps prevent undervoltage errors during brownouts. This arrangement is useful on axes that return energy to the DC bus during deceleration or other braking events.