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DC converter is an important part of DC systems such as hybrid (PV and wind turbine) system. Buck DC/DC converter one of this converter is the main control in DC voltage regulator. The desired performance of this DC converter is following the reference voltage and having a fast response. The use of a DC motor as a load makes the control system has the aim to stabilize the DC bus voltage and DC motor speed. This paper designs controllers based on the principle of backstepping control to operate a DC converter and DC motor. A non-linear control Backstepping have many parameters that need to be determined in order to obtain the desired response. Modification to adaptive backstepping is promised to improve the response generated by conventional backstepping. Fuzzy logic, as an adaptive control, works very well and provides optimal values of backstepping parameters. This tuning process is expected that the controller performances have reliability, quick response, and robust system. The proposed controller is compared by PI controller and other adaptive backstepping controller. Simulation results show no overshoot such that the response given by the proposed controller is better than other controllers. The performance produced by the proposed controller has a simple design and a good response.

Adaptive backstepping control for Buck DC/DC converter and DC motor