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

Filtering device and power supply system

A filter device and filter circuit technology, applied in the field of circuits, can solve problems such as the difficulty in weighing the conflict between filter performance and circuit cost, and achieve the effects of reducing circuit cost, improving filter performance, and broad application prospects

Active Publication Date: 2015-08-26
HUAWEI TECH CO LTD
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Active common-mode EMI filters in the current technology are usually difficult to balance the conflict between filtering performance and circuit cost

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
  • Filtering device and power supply system
  • Filtering device and power supply system
  • Filtering device and power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] In order to facilitate understanding of the solutions provided by the embodiments of the present invention, the following concepts are firstly introduced.

[0049] 1) Electromagnetic Interference (Electromagnetic Interference) refers to the interference phenomenon caused by the interaction between electromagnetic waves and electronic components. There are two types of conduction interference and radiation interference. Conducted interference ref...

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

An embodiment of the invention provides a filtering device and a power supply system. The filtering device is connected between an external power supply and equipment and comprises a feedback-type active common-mode filter and a feedforward-type active common-mode filter. The feedback-type active common-mode filter comprises a common-mode noise detection device and a first filtering circuit. The feedforward-type active common-mode filter comprises the common-mode noise detection device and a second filtering circuit. The first filtering circuit is connected between the common-mode noise detection device and the equipment and is used for carrying out feedback-type filtering on a first common-mode noise signal to obtain a second common-mode noise signal; the common-mode noise detection device is connected between the first filtering circuit and the second filtering circuit and is used for detecting the second common-mode noise signal and providing the second common-mode noise signal to the second filtering circuit; and the second filtering circuit is connected between the external power supply and the common-mode noise detection device and is used for carrying out feedforward-type filtering on the second common-mode noise signal. The filtering device and power supply system can effectively improve filtering efficiency of the common-mode noises to some extent.

Description

technical field [0001] Embodiments of the present invention relate to the field of circuits, and more specifically, to a filtering device and a power supply system. Background technique [0002] With the increasing number of electronic devices, the phenomenon of Electromagnetic Interference (EMI for short) is becoming more and more serious. EMI conducted interference includes common mode interference. In order to solve the problem of EMI common-mode interference, the traditional method is to add a passive EMI common-mode filter (composed of common-mode inductors and Y capacitors) to the system to suppress noise. However, passive common-mode filters have disadvantages such as large volume and high cost. In recent years, some scholars have used active filtering technology to solve the problem of EMI common-mode interference, and formed a new active common-mode EMI filter. Active common-mode EMI filters in the current technology are usually difficult to balance the conflict ...

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): H02J3/00H02M1/44
CPCH02M1/12Y02E40/30Y02E40/40H02J3/1835H02J3/01H02M1/123H02J3/241H03H7/427H03H1/0007H03D3/08
Inventor 裴昌盛高拥兵张鹤龄
Owner HUAWEI TECH CO LTD
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