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

Common-mode current detection and suppression system and working method thereof

A common-mode current and common-mode choke coil technology, which is applied in the field of common-mode current detection and suppression systems, can solve problems such as attenuating circuit drive signals and affecting useful signals, so as to reduce interference, strengthen EMI noise suppression, and suppress EMI noise Effect

Pending Publication Date: 2022-01-28
STATE GRID SHAANXI ELECTRIC POWER RES INST +1
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above existing methods will affect the useful signal and also attenuate the driving signal in the circuit, so a new common-mode current detection and suppression circuit is urgently needed

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
  • Common-mode current detection and suppression system and working method thereof
  • Common-mode current detection and suppression system and working method thereof
  • Common-mode current detection and suppression system and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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 common-mode current detection and suppression system and a working method thereof, and the system comprises: an RC circuit, which is used for being connected with a switching tube of a to-be-detected and suppression circuit in parallel; a passive EMI filter, which comprises a common mode choke, an adjustable Y capacitor and an X capacitor; an extraction module, which is used for collecting oscillation waveforms; an analog-to-digital conversion module, which is used for carrying out digital processing to obtain discrete digital signals; a digital signal processing module, which is used for analyzing and processing to obtain a control and regulation signal; and an adjusting module, which is used for adjusting the capacitance value of the adjustable capacitor according to the control adjusting signal obtained by the digital signal processing module so as to realize common-mode current detection and suppression. According to the system provided by the invention, the common-mode current can be inhibited from the source and the propagation path of the common-mode current without influencing useful signals; and interference of high-frequency interference on internal elements and surrounding equipment of the power converter system can be reduced, and meanwhile driving signals in a circuit cannot be attenuated.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a common-mode current detection and suppression system and a working method thereof. Background technique [0002] With the development of modern society, the switching frequency and power density of switching devices in the circuit system are getting higher and higher. Due to the existence of high-frequency du / dt and parasitic capacitance, it will provide a loop with low impedance for high-frequency signals. These high-frequency The current signal will cause serious electromagnetic interference (EMI) to other electronic components in the circuit system; for example, high-frequency common-mode current forms high-frequency electromagnetic radiation, which will cause certain induced currents in the surrounding equipment and the closed loop of the system itself. Therefore, in order to ensure that the system can work normally when the motor is running at high sp...

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): H02M1/12H02M1/44
CPCH02M1/12H02M1/44
Inventor 成林毕闯卢江平刘健周畅吴健吴经锋郭安祥
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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