A kind of active disturbance rejection control method of cuk converter

An active disturbance rejection control and converter technology, which is applied to the conversion equipment, control/regulation system of Cuk converter, DC power input conversion to DC power output, etc., can solve the problems of input voltage disturbance and output voltage influence, etc. Achieve good robustness and strong robustness

Active Publication Date: 2021-04-09
HAINING SWITCH FACTORY CO LTD +2
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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and proposes an active disturbance rejection control method of a Cuk converter, to overcome the input voltage disturbance, parasitic parameter disturbance, and load disturbance in the Cuk converter in the prior art. problems that seriously affect the output voltage

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  • A kind of active disturbance rejection control method of cuk converter
  • A kind of active disturbance rejection control method of cuk converter
  • A kind of active disturbance rejection control method of cuk converter

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Embodiment Construction

[0041] Examples of the embodiments described below are shown in the drawings, in which the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] figure 1 shows a schematic diagram of the Cuk converter ADRC control method applied in this embodiment, figure 2 The structural model of the Cuk converter is shown, and the active disturbance rejection control method of the Cuk converter includes the following steps:

[0043] In the first step, the mathematical model of the Cuk converter is established according to the Cuk circuit. The mathematical model of the Cuk converter includes the first state space model when the switch is closed and the second state space model when the switch is disconnected, specifica...

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Abstract

The invention provides an active disturbance rejection control method of a Cuk converter, which belongs to the technical field of electronic control. It solves the problem that the output voltage is seriously affected by input voltage disturbance, parasitic parameter disturbance and load disturbance in the prior art. The method comprises: a, establishing a mathematical model of the Cuk converter according to the Cuk circuit; b, designing a second-order differential equation to determine the tracking differentiator, and extracting the original source of the input reference voltage in the mathematical model of the Cuk converter through the tracking differentiator signal and derivative signal; c. Establishing an extended state observer based on the second-order nonlinear system to estimate the total disturbance of the system; d. Using the error signal and its derivative signal and its integral signal for nonlinear combination to determine the nonlinear state error feedback control The control quantity of the system is constituted by the above-mentioned nonlinear combination and the total disturbance. This control method can make the output voltage have better robustness, adaptability and stability.

Description

technical field [0001] The invention belongs to the technical field of electronic control, in particular to an active disturbance rejection control method of a Cuk converter. Background technique [0002] The Cuk converter can both step up and step down, and has excellent characteristics and good steady-state performance, so it is widely used in power electronic equipment as a switching power supply module. With the development and progress of science and technology, people have higher and higher requirements for the performance of switching power supplies. In the working process of power electronic converters, in order to improve the stability of the system, it is very important to choose an appropriate control method. [0003] The traditional PID method is applied to the control of the Cuk converter. Due to the nonlinear relationship between the output voltage of the converter and the duty cycle and the nonlinearity caused by switching, input voltage fluctuations, load dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00
CPCH02M3/005
Inventor 封东良陈周明陆海强何峰方风雷郭振宗西举刘大志
Owner HAINING SWITCH FACTORY CO LTD
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