Common-mode current restraining device for electric automobile

A common mode current and suppression device technology, which is applied in the direction of output power conversion device, prevention/reduction of unnecessary electric/magnetic influence, electrical components, etc., can solve problems such as poor suppression effect

Inactive Publication Date: 2008-12-17
TSINGHUA UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the environment of electric vehicles, the wire diameter of the power cable is relatively large, up to 1cm or more. For the magnetic cores on the market, the inner diameter is generally less than 4cm. The cable can only pass through the magnetic core directly, which is equivalent to the number of turns of a coil, and the equivalent inductance obtained is only about 1uH, and the suppression effect is poor

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 restraining device for electric automobile
  • Common-mode current restraining device for electric automobile
  • Common-mode current restraining device for electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] With reference to the accompanying drawings, the specific content and embodiments of the present invention will be further described.

[0014] The composition and structure of the common-mode current suppression device for electric vehicles proposed by the present invention is as follows: figure 1 As shown, including two power cables at the same time L 1 , L 2 The two high frequency cores TR 1 、TR 2 ; Auxiliary coils N wound on the two high-frequency magnetic cores respectively 1 , N 2 ; A control circuit composed of cascaded three operational amplifiers and a power driver. Positive and negative two power cables L 1 , L 2 Simultaneously pass through both cores TR 1 and TR 2 , the auxiliary coil N 1 The winding direction with the cable passing through the core TR 1 The same direction; auxiliary coil N 2 The winding direction with the cable passing through the core TR 2 The direction of the cable is opposite, and the starting point of the cable passing throug...

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 relates to a common mode current restraining device used in the electric automobile, belonging to the technical field of the electric automobiles, composed of two high-frequency cores TR1, TR2 and auxiliary coils N1 and N2 sleeved on two power cables at the same time; a control circuit is composed of three operational amplifiers in the cascade connection and a power drivers, wherein the winding direction of N1 is the same to that of the cable passing through the magnetic core TR1; the winding direction of N2 is opposite to that of the cable passing through the magnetic core TR2; the identical terminal of N1 is connected with the ground of the control circuit, and the other end is connected with the common mode input terminal; the inverted input terminal of A1 is connected with the output terminao, and the output signal of A4 is connected with the output terminal; the identical terminal of N2 is connected with the output terminal of the power drivers A4, and the other end is connected with the ground of the control circuit. The device has better inhibition on the common mode current.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a common-mode current suppression device for electric vehicles. Background technique [0002] Electric vehicles have the advantages of energy saving and environmental protection, and their research and development have received extensive attention. However, the vehicle-mounted high-power power converter generates broadband electromagnetic noise and electromagnetic interference (EMI) during the working process, which mainly propagates along the cable and chassis in the form of common-mode current, affecting the normal operation of the electrical equipment and control system on the vehicle. , resulting in serious electromagnetic compatibility problems, which is not conducive to the reliable operation of electric vehicles and its industrialization process. During the "Eleventh Five-Year Plan" period, the electromagnetic compatibility of electric vehicles, as a...

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): H02M1/14H01F17/04H01F27/36H01F27/38
Inventor 黄勇陈全世仇斌陈伏虎
Owner TSINGHUA 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