Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method and device for optimizing instantaneous dynamic of LLC resonant converter load

A resonant converter, a dynamic technology, applied in the output power conversion device, the conversion equipment with intermediate conversion to AC, the conversion of DC power input to DC power output, etc., can solve the problem of high controller requirements and controller processing speed. High requirements and other problems, to achieve the effect of improving the dynamic response speed, avoiding the calculation deviation and the process of a large number of calculations, and accelerating the speed of change

Inactive Publication Date: 2020-07-28
SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this strategy requires accurate modeling of the LLC, and the switching cycle needs to be calculated cycle by cycle, the control speed is extremely fast, and the controller has high requirements
That is to say, it has the following defects: the optimal trajectory control requires a high processing speed of the controller; the average current control only has better dynamic characteristics at the resonance point; the peak current control needs to increase the more complex peak current sampling circuit

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
  • Method and device for optimizing instantaneous dynamic of LLC resonant converter load
  • Method and device for optimizing instantaneous dynamic of LLC resonant converter load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The technical solutions of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0026] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In order to realize the above-mentioned effect and its superiority, a kind of method for optimizing the instant dynamics of LLC resonant converter load of the present invention is to obtain LLC switching frequency and input voltage, A series of discrete points related to the output voltage and output current (modules with constant input do not need additional input voltage test points), and these discrete points are fitted to obtain the optimal objective function of the LLC switching frequency. Through the accurate and effective load dynamic switch judgment, the final output PID result of the voltage loop controller is linearly approached to the expected out...

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 method and device for optimizing the instantaneous dynamic state of an LLC resonant converter load. Firstly, an actual test of a specific point is carried out on the LLC resonant converter; discrete points related to the LLC switching frequency, the input voltage, the output voltage and the output current are obtained; and fitting is carried out to obtain an optimal objective function of the LLC switching frequency, and then through dynamic load switching judgment, a final output PID result of the voltage loop controller linearly approaches an expected output value ofthe optimal objective function when a load suddenly changes. An effective LLC switching frequency target function is obtained through a simple fitting mode, and the PID output result of the voltage controller linearly approaches the expected value of the LLC switching frequency during dynamic load switching. According to the method, the calculation deviation and a large quantity of calculation caused by LLC small signal model modeling are avoided, and the change speed of the LLC switching frequency is increased, so that the dynamic response speed of the LLC is increased under the condition that the hardware cost of the system is not increased.

Description

technical field [0001] The invention relates to the field of LLC resonant converters, in particular to a method and device for optimizing instantaneous load dynamics of LLC resonant converters. Background technique [0002] Among the currently used dynamic control strategies for LLC resonant converters, such as the application number CN201810372510.X, the title of the invention is "A Method for Parameter Optimization Design of LLC Resonant Converter Based on Minimum Loss", all of which adopt optimal trajectory control. In the trajectory control strategy, the controller judges whether a load mutation occurs by changing the output current. Once the load mutation occurs, the controller calculates the driving cycle change amount according to the output current before the load mutation and the output current after the mutation, and superimposes it to the linear In the controller, quick adjustment is realized. However, this strategy requires accurate modeling of the LLC, and the ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00H02M3/28
CPCH02M3/00H02M3/28
Inventor 焦凌云田超彭玉成于泽坤曹会平
Owner SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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
Eureka Blog
Learn More
PatSnap group products