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Buck type converter digital controller design method adopting interference filtering compensation

A digital controller and interference filtering technology, which is applied in the control/regulation system, output power conversion device, DC power input conversion to DC power output, etc., can solve the problems of amplification, output voltage ripple and large noise

Pending Publication Date: 2022-07-15
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of large output voltage ripple and noise amplification in the existing control methods, the present invention provides a design method for a Buck converter digital controller using interference filter compensation

Method used

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  • Buck type converter digital controller design method adopting interference filtering compensation
  • Buck type converter digital controller design method adopting interference filtering compensation
  • Buck type converter digital controller design method adopting interference filtering compensation

Examples

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Embodiment

[0103] The closed-loop control is performed on the output waveform of the Buck-type DC converter. The Buck-type converter used is composed of a given signal part, a digital controller, a PWM modulation part, a Buck-type converter main control circuit, a signal conditioning circuit and an AD sampling circuit, such as image 3shown. The given signal, digital controller and PWM modulation module are all realized by ARM control board, and the rest are realized by Buck converter hardware circuit. The entire Buck-type converter control system is given the desired signal to be output by the ARM, and after PWM modulation, drives the high and low pulse signals of the power switch tube of the Buck-type converter to realize turn-on and turn-off. The output signal of the Buck converter is returned to the ARM through the signal conditioning circuit and AD module to collect the required voltage signal data, and then the input signal (the required PWM signal) is corrected after the action o...

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PUM

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Abstract

The invention discloses a design method of a Buck type converter digital controller adopting interference filtering compensation. An interference compensator based on a moving average filtering technology is adopted and is embedded into a constraint variable speed attraction law, and an ideal error dynamic state with interference suppression capability is constructed; and dynamically designing a digital controller according to the ideal error, and taking a control signal obtained by calculation as a control input signal of the Buck-type converter. Specific controller parameter setting work can be carried out according to indexes of a system attraction process, and expressions representing an absolute attraction layer and a steady-state error band boundary of the system attraction process are given. According to the digital controller design method provided by the invention, various interference signals such as system flutter and nonlinearity can be effectively suppressed, output voltage ripples can be effectively reduced, and inductive current constraint hardware protection is realized.

Description

technical field [0001] The invention relates to a design method of a Buck-type converter digital controller using interference filtering compensation. The method is suitable for a step-down DC power supply and also for a DC-DC power supply in industrial control. Background technique [0002] Buck converter is a power electronic device that realizes the voltage conversion of DC circuit. Buck-type converters have the advantages of simple and lightweight system structure, stable voltage reduction, safety and reliability, etc., and are currently widely used in electric vehicle charging, LED driving, aerospace and other industrial fields. [0003] The linear proportional-integral-derivative (PID) control method is commonly used in traditional Buck converter voltage control. However, due to various disturbances such as load mutation, input voltage mutation and model parameter perturbation in Buck converters, high-performance control cannot be achieved. Sliding mode control is a n...

Claims

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Application Information

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IPC IPC(8): H02M3/157H02M3/158H02M1/08H02M1/14H02M1/44
CPCH02M3/157H02M3/1582H02M1/08H02M1/14H02M1/44
Inventor 梅盼邬玲伟雷必成林志明苏娜
Owner TAIZHOU UNIV
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