Finite time passive control method for Buck converter

Abstract

The invention relates to a finite time passive control method for a Buck converter. The output voltage and inductive current of the Buck converter are taken as the control parameters of a finite time passive controller, and then the control parameters are input in the finite time passive controller; a continuous control law is generated through calculation by the finite time passive controller; the continuous control law is subjected to PWM chopping wave processing to generate constant-amplitude PWM wave; and the controllable switch tube of the Buck converter is controlled. According to the finite time passive controller, a lyapunov function with fractional power is designed, and a closed loop system configured by the lyapunov function can be stable within a finite time. By adoption of the finite time passive controller, it is ensured that the output voltage of the Buck converter can be stable within a finite time, and the convergence performance of the output voltage is improved.

Description

technical field [0001] The invention relates to a switch circuit, in particular to a design method for a limited-time passive control of a Buck converter. Background technique [0002] Among the performance indexes of the control system, the convergence performance is a key one. However, in the research results obtained by most of the control design methods, the fastest convergence speed of the closed-loop system is exponential, and better convergence performance cannot be obtained. The reason is that they all discuss closed-loop systems that satisfy the Lipschitz continuous nature of the situation. For example, the passive control method, by selecting the Lyapunov candidate function with actual physical meaning, according to the interconnection damping injection control algorithm, constructs a closed-loop feedback to make the closed-loop system present passive characteristics to achieve the purpose of stability, but the control constructed by this method The law satisfies...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of slow response speed of the output voltage of the Buck converter under passive control, and proposes a finite-time passive control method for the Buck converter, which can effectively improve the quality of the output voltage of the Buck converter and make the output voltage within a limited Stable within a short period of time, improve the output voltage response speed

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