Composite current constraint control method of direct-current buck converter

A technology of DC step-down and composite current, which is applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc. It can solve the problems that the dynamic response of output voltage and anti-disturbance performance cannot be well considered, and achieve good The effect of applying value

Active Publication Date: 2017-08-11
SOUTHEAST UNIV
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a compound current constraint control method for a DC step-down converter, and solve the problem that the controller cannot take into account the dynamics of the output voltage while implementing the instantaneous current constraint on st

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite current constraint control method of direct-current buck converter
  • Composite current constraint control method of direct-current buck converter
  • Composite current constraint control method of direct-current buck converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0031] Such as figure 1 and 2 As shown, the present invention designs a composite current constraint control method of a DC step-down converter, which specifically includes the following steps:

[0032] Step 1. Taking the capacitor voltage and inductor current of the DC step-down converter as state quantities respectively, and adopting the time averaging technique, a state-space average model of the nominal system of the DC step-down converter is established.

[0033] Such as figure 1 and figure 2 Shown are the basic control structure and platform structure of the DC step-down converter respectively. V in is the input voltage, L is the filter inductance, VD is the diode, VT is the switch tube, C is the output capacitor, R is the load resistance, u is the control input of the switch tube VT, that is, the output of the controller, V o As the capacitor volta...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a composite current constraint control method of a direct-current buck converter. The method comprises: a state space averaging model of a direct-current buck converter nominal system is established by using a capacitor voltage and an inductor current of the direct-current buck converter as state quantities; a reference current constraint controller is established; according to parameter perturbation of the direct-current buck converter system, input voltage fluctuation and load sudden-change disturbance, a disturbed-state averaging model of the direct-current buck converter is established; a generalized proportional-integral observer is constructed and a time-varying disturbance estimation value is obtained; the reference current constraint controller is introduced to carry out compensation on time-varying disturbance to obtain a composite current constraint controller; and calculation is carried out to obtain a controlled quantity, the controlled quantity is outputted by an output module to obtain a PWM drive signal, and a switching tube of the buck converter is controlled, thereby realizing voltage control of the buck converter. Therefore, requirements of high rapidness and accuracy of output voltage tracking and the anti-disturbance performance of the system can be met while the current constraint function is met.

Description

technical field [0001] The invention relates to a compound current constraint control method of a direct current step-down converter, belonging to the technical field of power electronic converters. Background technique [0002] With the deteriorating global environment and the shortage of traditional fossil energy, efforts to develop renewable new energy have become the consensus of all countries. This greatly promotes the wide application of new energy-oriented DC step-down converter systems in various voltage regulation systems. The DC buck converter system plays an extremely important role in it, and its applications include: high-voltage DC power transmission and distribution systems, solar photovoltaic power generation systems, electric vehicle systems, industrial automation systems, and military aerospace systems. The output voltage response speed, anti-disturbance ability and tracking accuracy of the buck converter all play a vital role in the electrical equipment c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02M3/156
CPCH02M3/156
Inventor 李世华王佐王翔宇郭天亮李奇
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap