BIDIRECTIONAL DC-DC CONVERTER WITH OUTER LOOP VOLTAGE BASED ON FUZZY PID CONTROL
This paper introduces the Bidirectional DC-DC Converter with Outer Loop Voltage Based on Fuzzy PID Control. Since the traditional PID controller cannot better balance the dynamic and static performance problems, we took Boost converter as an example and proposed a double closed-loop control system with the outer voltage loop based on fuzzy PID control and the inner voltage loop using PI control in view of the fact that in fuzzy control, it is unnecessary to establish the accurate mathematical model of the controlled object. And then we designed a bidirectional DC-DC converter with the outer loop voltage using fuzzy PID control. A Boost simulation model was established in Matlab/Simulink. The contrastive simulation experiments show that compared with the traditional PID control methods, the response speed and the output voltage ripple of the bidirectional DC-DC converter are greatly reduced. It means that the proposed fuzzy PID control on the outer loop voltage can solve the nonlinear problems of the bidirectional DC-DC converter, and represents an emerging trend in physical sciences and applied sciences as well.
|Keywords: Bidirectional DC-DC Converter; Fuzzy PID Control; Nonlinearity; Control Performance|
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