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Finite time passive control method for Buck converter

A limited time, passive control technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve problems such as slow response speed

Active Publication Date: 2016-08-17
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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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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  • Finite time passive control method for Buck converter
  • Finite time passive control method for Buck converter
  • Finite time passive control method for Buck converter

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Embodiment Construction

[0032] In order to effectively improve the quality of the output voltage of the Buck converter, stabilize the output voltage within a limited time, and improve the response speed of the output voltage, the technical solution of the present invention is as follows:

[0033] Such as figure 1 The finite-time passive control structure diagram of the Buck converter is shown, and the Buck converter circuit includes a DC voltage source V in , a controllable switch tube S W , a freewheeling diode D, an inductor L, a capacitor C and a load resistor R 0 . Put the DC voltage source V in As a discharge element connected to the input of the Buck converter, the DC voltage source V in The positive pole passes through the controllable switch tube S W And the reverse freewheeling diode D is connected to the DC voltage source V in The negative pole, the inductance L and the capacitance C are connected in series and at both ends of the reverse freewheeling diode D, and the load resistance ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 杨帆田雷李东东林顺富边晓燕
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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