A kind of asynchronous control method of dc-dc converter
A DC-DC, asynchronous control technology, applied in control/regulation systems, conversion of DC power input to DC power output, instruments, etc.
Active Publication Date: 2021-01-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an asynchronous control method for a DC-DC converter to solve the high-frequency characteristics of the switching circuit of the DC-DC converter and to control the stability of the switching process
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[0020] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.
[0021] The technical solution of the present invention will be described in detail below by taking a step-up DC-DC converter as an example in conjunction with the accompanying drawings.
[0022] Such as figure 1 As shown, the present invention involves semi-Markov modeling of DC-DC converters, design of asynchronous controllers, design of closed-loop systems, solution of controllers and proof of system stability. A step-up DC-DC converter that usually works in continuous mode has two working states, such as figure 2 Shown are (a) switch closed and (b) switch open. Assum...
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The invention discloses an asynchronous control method of a DC-DC converter, and relates to the establishment of a semi-Markov switching model including the DC-DC converter and the design of an asynchronous control algorithm. The invention discloses a semi-Markov switching modeling and asynchronous control algorithm of a DC-DC converter. Its technologies include semi-Markov modeling of DC converters, design of asynchronous controllers, establishment of closed-loop systems, solution of controllers and proof of stability of closed-loop systems. Aiming at two different circuit working states of the DC-DC converter, the invention establishes a switching model subject to semi-Markov distribution. Aiming at its switching characteristics, an asynchronous controller based on state feedback is designed and solved, and the stability of its closed-loop system is analyzed and proved. The invention can effectively solve the stability control of the DC-DC converter under the semi-Markov switching of the system model.
Description
technical field [0001] The invention belongs to the technical field of DC power conversion, and more specifically, relates to an asynchronous control method of a DC-DC converter, that is, the switching relationship of the converter switching circuit and its asynchronous control strategy Background technique [0002] Due to the advantages of high reliability, high power density, high power factor, and high-efficiency circuit conversion, DC-DC converters have become a research hotspot and are widely used in various power electronic devices. Obtaining an accurate mathematical model is a prerequisite for studying DC-DC converters. Usually the small-signal modeling method is adopted to establish the DC-DC converter model, the literature ["Small-signal models with extended frequency range for DC–DC converters with large modulation ripple amplitude" (Xin Li, Xinbo Ruan, Qian Jin, Mengke Sha, andChi K.Tse,IEEE Transactions on Power Electronics,2018,33(9):8151-8163)] studied a DC-DC...
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IPC IPC(8): H02M3/00
CPCH02M3/00
Inventor 李猛徐龙宇张龙杰陈勇陈章勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA