دانلود رایگان مقاله انگلیسی یک کنترل کننده جامع جدید برای مبدل های DC-DC بر اساس روش های SMC - نشریه IEEE 2018

Abstract

A new general sliding mode controller is proposed for a DC-DC converter that can regulate the output voltage. Due to nature of some non-minimum-phase converters, an indirect method is used to control the output voltage. A robust nonlinear controller is employed that uses the output voltage error integral and provides zero steady state error. The proposed method was simulated in MATLAB / Simulink, and the controller, buck converter, boost, buck/boost, and fly back responses were determined. The proposed sliding mode control can cover the operating range of load variations, input voltage, and other parameters to provide robust and steady output voltage.

CONCLUSIONS

A general sliding mode controller was designed for DCDC converters in continuous conduction mode. An indirect method was used to control the converter output voltage because boost, buck/boost and flyback converters are nonminimum phase, requiring indirect control, and the controller can also be used for buck converters. A suitable PI controller was applied in sliding mode to change converter power switching from on to off so the output voltage reaches the reference voltage. The proposed controller produces zero error in steady-state for various output voltage references, variable loads and variable inputs along with acceptable dynamic response. The main advantages of the proposed controller are stability and robustness of the system parameters in the presence of uncertainty, and load and input voltage variations with constant frequency. Buck, boost, buck/boost, and flyback converters were simulated in MATLAB/Simulink software to evaluate the proposed controller response.