Nonlinear control method of Buck-Boost converter system

A nonlinear control and converter technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve complex control strategies, cannot completely eliminate inductor current transient overshoot, and increase software overhead And other issues

Active Publication Date: 2014-03-26
HEFEI UNIV OF TECH
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the performance of the system, on the basis of cooperative control, the selection of macro variables in the cooperative control is improved to reduce but not completely eliminate the transient overshoot of the inductor current at the cost of increasing software overhead. Searching for a Control Method to Effectively Suppress Transient Overshoot of Inductor Current
On the basis of cooperative control, the genetic algorithm is introduced to optimize the parameters of the cooperative control

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
  • Nonlinear control method of Buck-Boost converter system
  • Nonlinear control method of Buck-Boost converter system
  • Nonlinear control method of Buck-Boost converter system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] In this example, if figure 1 As shown, the composition of the Buck-Boost converter system includes: Buck-Boost converter main circuit, input voltage detection and conditioning circuit, inductor current detection and conditioning circuit, capacitor voltage detection and conditioning circuit, switch tube drive circuit and processor module, Buck- The main circuit of the Boost converter is composed of an input power supply, a switch tube MOS, an inductor L, a diode D, a capacitor C and a load R, and the switch tube MOS is a P-channel type;

[0051] The main circuit of the Buck-Boost converter is connected according to the following relationship: the anode of the input power is connected to the source of the switching tube MOS, the drain of the switching tube MOS, the cathode of the diode D and one end of the inductor L are connected together, and the anode of the diode D 1. The negative pole of the capacitor C is connected to one end of the load R, the negative pole of the ...

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 nonlinear control method of a Buck-Boost converter system. The nonlinear control method of the Buck-Boost converter system is characterized by comprising the following steps that first, an input voltage, an inductive current, a capacitor voltage and a state average model of a Buck-Boost converter main circuit are obtained; then, the cooperative control law of the Buck-Boost converter system is obtained; afterwards, the expectation value of the inductive current is obtained; at last, the cooperative passive control law of the Buck-Boost converter system is obtained, and therefore nonlinear control over the Buck-Boost converter system is achieved. By means of the nonlinear control method of the Buck-Boost converter system, the transient overshoot of the inductive current of the Buck-Boost converter system can be effectively removed, the steady state error of the capacitor voltage is reduced, and thus the stability of the Buck-Boost converter system is improved.

Description

technical field [0001] The invention relates to a DC-DC converter control system, more specifically to a nonlinear control method of a Buck-Boost converter system with boost and step-down functions. Background technique [0002] The Buck-Boost converter has been widely used in the field of power electronics due to its advantages of simple structure, wide input voltage range and flexible implementation of step-up and step-down control. [0003] The Buck-Boost converter usually adopts the classic double-closed-loop PI control of the current inner loop and the voltage outer loop. Closed-loop PI control often cannot obtain satisfactory system dynamic and static control performance, and even the phenomenon of unstable operation of the system may occur, so it is still necessary to find a high-performance nonlinear control strategy. [0004] For Buck-Boost converters, commonly used nonlinear control strategies include sliding mode control, passive control and cooperative control. ...

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): H02M3/155
Inventor 李红梅叶帮红周亚男姚宏洋张恒果
Owner HEFEI UNIV OF TECH
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