Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Independent charge-discharge sequential single-inductance dual-output switching converter frequency conversion control method and device

A single-inductance dual-output switching converter technology, which is applied to output power conversion devices, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve the problems affecting the improvement of converter efficiency, low converter conversion efficiency, Large inductor current ripple and other problems, to achieve the effect of wide load range, high transient response performance, and small ripple variation

Active Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Independent charging and discharging sequence single-inductance dual-output switching converter works in DCM, which eliminates the cross influence of the output branch, but the conversion efficiency of the converter is low, the inductor current ripple is large, and the load capacity is poor; when it works in PCCM, it overcomes the The disadvantage of large inductor current ripple is eliminated, but additional switching loss and conduction loss are introduced during the freewheeling switch working stage, which affects the improvement of converter efficiency; when working in CCM, the inductor current and output voltage ripple are small , The converter has high efficiency and strong load capacity, but the cross influence between the output branches is serious
Constant-frequency control technology based on pulse width modulation (PWM) is the most common control method for single-inductance dual-output switching converters. In CCM, if the branch load is unbalanced, the converter will lose stability and cannot work normally

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
  • Independent charge-discharge sequential single-inductance dual-output switching converter frequency conversion control method and device
  • Independent charge-discharge sequential single-inductance dual-output switching converter frequency conversion control method and device
  • Independent charge-discharge sequential single-inductance dual-output switching converter frequency conversion control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 1 It is shown that a specific embodiment of the present invention is: independent charging and discharging sequential single-inductance dual-output switching converter frequency conversion control method and its device, the device is mainly composed of the first current detection circuit IS1, the second current detection circuit IS2, the second A voltage detection circuit VS1, a second voltage detection circuit VS2, an adder ADD, a first error amplifier EA1, a second error amplifier EA2, a first pulse generator PGR, a second pulse generator PGS, a first flip-flop RS, a second Two flip-flops D, the first drive circuit DR1, the second drive circuit DR2 and the third drive circuit DR3 are composed; in each switching cycle, the capacitive currents of the two branches are detected to obtain the signal i c1 and i c2 , detect the output voltage of the two branches, and get the signal V oa and V ob ; will i C1 and i C2 Send to the adder ADD to generate signal i C ;...

Embodiment 2

[0044] Such as Figure 9 As shown, the second embodiment of the present invention is basically the same as the first embodiment, except that the converter TD controlled in this example is a single-inductance dual-output Boost converter.

[0045] In addition to the switching converters in the above embodiments, the present invention can also be used in various multi-output circuit topologies such as single-inductor dual-output Buck-Boost converters and single-inductor dual-output Bioplor converters.

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 frequency conversion control method and device for a single-inductance dual-output switch converter with independent charging and discharging sequence. By limiting the peak value and valley value of the capacitive current, the control of the main switch tube and the branch switch tube of the converter is completed. Independent regulation of each output branch is realized. Compared with the traditional single-inductance dual-output switching converter with independent charging and discharging sequence, the present invention has good stability, high reliability, wide load range, strong anti-interference ability, fast input and load transient response speed, and the output branch It can be used to control a variety of converters with a single-inductor dual-output topology, such as Buck converters, Boost converters, Buck-boost converters, and Bipolar converters.

Description

technical field [0001] The invention relates to power electronic equipment, in particular to a control method and device for a single-inductance double-output switching converter. Background technique [0002] With the popularity of smart mobile devices, switching power supplies are developing towards high reliability, small size, low cost, and multiple outputs. Single-inductor multiple-output switching converters have attracted much attention from academia and industry because they only need one inductor, which greatly reduces the number of magnetic cores required for multiple output systems and lowers the cost. However, since each output branch of the single-inductor multi-output switching converter shares an inductor, the output branches are coupled together through the inductor. When the load of one output branch changes, the inductor current will affect the output of other output branches. output, thus causing cross effects. When the crossover effect is light, it will...

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 Patents(China)
IPC IPC(8): H02M3/10H02M1/14
CPCH02M1/14H02M3/10H02M1/0003H02M1/009
Inventor 周国华周述晗刘啸天冷敏瑞
Owner SOUTHWEST JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com