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The control problem of vehicle DC-DC converter is the key problem of the new energy vehicle power system. In this study, Averaged state space method is used to develop converter model. the new global fast terminal sliding mode control scheme is proposed as a new approach for the voltage tracking control, a new control design method is developed to obviate the DC-DC converter disturbances. In order...
This research details how to design a grid-connected photovoltaic system, including modeling of photovoltaic cells, DC-DC Ćuk design, sliding mode control, etc. It is shown that in the case of embedding coils in input-output structure of Ćuk converter, application of sliding mode control for maximum power point tracking is superior over the other techniques. Maximum power point tracking is implemented...
A integral sliding mode controller (ISMC) for a fixed-frequency PWM is proposed for the Cuk converter. The fourth-order model of the Cuk converter is derived first and it is simplified to use ISMC. Based on the simplified system model, the ISMC that consists of the equivalent control part plus the switching control part is designed and applied to the Cuk converter in the presence of uncertain variations...
DC-DC converter is a variable structure control system inherent due to the characteristics of the power switch. Sliding mode control technology is ideally suited for variable structure control system. In this paper, the sliding mode controller is designed based on the hysteresis modulation. The sliding surface parameters and the width of the hysteresis loop are given. Finally, a simulation of BUCK...
By using the differential geometry theory, the nonlinear coordinate change matrix and the nonlinear state variable feedback equations are proposed based on affine nonlinear model of buck converter. Then the exact feedback linearization model is obtained. On the basis of linearization model, the sliding mode controller is designed by selecting linear sliding surface and exponent reaching law. The research...
This paper presents the application of DC-DC converter for supplying DC load from the standalone wind turbine. Output obtained from the induction generator is not constant due to variation in the wind speed. To maintain the constant voltage at the output step up converter and sliding mode based step down converter is used.
This paper presents a FPGA-based digital control for a DC-DC converter. The main difference from DSP-based solution is that FPGA allows simultaneous execution of all control procedures, enabling high performance and novel control methods. The control algorithm has been developed using a VHDL language or CAD state graphical approach based on the use of logical state diagram. The FPGA switching controller...
This paper presents a maximum power point tracker method using sliding mode control for a photovoltaic module to produce and maintain the maximum power possible for a configuration of the array and the environmental variables. This is obtained using a variable structure control system to control the duty cycle of a DC-DC converter. The variable structure control system is a sliding mode control that...
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