Inductive current estimation method for DC-DC switching power supply

A technology of inductive current and switching power supply, which is applied in the direction of electrical components, adjusting electrical variables, and output power conversion devices, etc., can solve the problems of expensive ADC requirements, achieve high flexibility and integration, reduce costs, and reduce sampling The effect of frequency

Active Publication Date: 2022-03-08
SOUTHEAST UNIV +1
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is an obvious disadvantage for DC-DC switching power supplies with high switching frequency since the ADC requirements are very expensive

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
  • Inductive current estimation method for DC-DC switching power supply
  • Inductive current estimation method for DC-DC switching power supply
  • Inductive current estimation method for DC-DC switching power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to illustrate the present invention more clearly, the technical solutions of the present invention will be further explained below in conjunction with the accompanying drawings.

[0043] figure 1 It is a system structure diagram of the application of the inductor current estimation method in the BUCK switching power supply in the present invention, including a voltage sampling module, a data conversion module, a switch signal counting module, an inductor voltage calculation module and a digital filter module; the synchronous rectification BUCK passes through the control The turn-on and turn-off times of the switch tube MOS1 and the lower switch tube MOS2 are used to control the output voltage. Among them, the voltage sampling module inputs the input voltage V of the DC-DC switching power supply in and the output voltage V o , get the input voltage digital quantity D in [n] and output voltage digital quantity D o [n], and then through the data conversion mod...

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 an inductive current estimation method for a DC-DC switching power supply. A voltage sampling module, a data conversion module, a switching signal counting module, an inductive voltage calculation module and a digital filter module are included. The input voltage and the output voltage pass through the voltage sampling module and the data conversion module to obtain converted input voltage and converted output voltage with the same digit; the node voltage is compared with the reference voltage, and then the duty ratio is obtained through the switching signal counting module; the inductance voltage calculation module outputs the average value of the voltages at the two ends of the inductance and the parasitic resistor, and the estimated inductance current is finally obtained through the digital filter module; the real-time inductive current can be accurately estimated under the condition that only input and output voltages are sampled, additional analog sampling circuits such as resistors, capacitors and operational amplifiers do not need to be added, a high-speed ADC far higher than the switching frequency is not needed, the cost can be reduced, the circuit size is reduced, and high universality is achieved.

Description

technical field [0001] The invention belongs to the field of switching power supplies, in particular to a method for estimating the inductance current of a DC-DC switching power supply. [0002] technical background [0003] With the continuous development of science and technology, a variety of electronic devices appear in people's lives, ranging from various portable and wearable electronic devices, such as mobile phones, smart watches, tablet computers, to automotive electronics, medical equipment, etc. improving people's lives. Consumer electronics are constantly iteratively updated, and their functions are becoming more and more powerful, which also requires electronic products to have a stable power supply system to maintain their normal work. At the same time, the size of electronic products is getting smaller and smaller. Before there is a breakthrough in battery technology, the power supply efficiency can only be improved through high-performance power management ch...

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): H02M3/157H02M3/158
CPCH02M3/157H02M3/1588Y02B70/10
Inventor 徐申杨晨曦钱毅杰刘玉洁于利民孙伟锋时龙兴
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