Check patentability & draft patents in minutes with Patsnap Eureka AI!

Demagnetization method and demagnetization device of switching power supply transformer

A technology of switching power supply and demagnetization device, which is applied in the field of transformers, can solve the problems such as the ineffective demagnetization effect, and achieve the effect of eliminating the need for demagnetization design and simplifying the circuit structure

Pending Publication Date: 2018-01-05
DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the transformer windings are often reversely magnetized during the demagnetization process, and the demagnetization effect is not obvious.

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
  • Demagnetization method and demagnetization device of switching power supply transformer
  • Demagnetization method and demagnetization device of switching power supply transformer
  • Demagnetization method and demagnetization device of switching power supply transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] This embodiment provides a demagnetization method for a switching power supply transformer. Based on the fact that switching power supplies generally use MOSFETs as power switches, the distribution parameters are used to complete the demagnetization work, that is, the resonance technology is used for demagnetization. Specifically: after the power switch is cut off, the self-inductance of the transformer and the distributed capacitance of the components in the circuit are used to resonate, and the magnetization energy of the transformer is transferred to achieve the purpose of removing the remanence of the transformer. Magnetic design simplifies the circuit structure...

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 belongs to the technical field of transformers, and particularly relates to a demagnetization method and a demagnetization device of a switching power supply transformer. The method comprises the steps of performing resonance oscillation by utilizing self-inductance of the transformer and distributed capacitance of a component in a circuit after a power switch is cut off, and transferring magnetization energy of the transformer to remove residual magnetization energy in the transformer. According to the method, the resonance oscillation is performed by utilizing the self-inductance of the transformer and the distributed capacitance of the component in the circuit, and the magnetization energy of the transformer is transferred, so that a purpose of removing residual magnetismof the transformer is achieved; relatively complicated demagnetization design is omitted; and a circuit structure is simplified.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a method and device for demagnetizing a switching power supply transformer. Background technique [0002] The residual magnetism of the transformer has always been a factor affecting the operation and testing of the transformer. Effectively removing the residual magnetism of the transformer can eliminate the test work related to the transformer winding, and can reduce the unbalanced impact of the main electrical equipment such as generators when they are connected to the grid. [0003] The classic demagnetization methods commonly used in engineering include adding demagnetization windings, active clamping, R-C-D clamping method, ZVT clamping method, etc. The common idea is: after the main power switch is turned off, through a certain way, the transformer The remaining magnetization energy is discharged or consumed in passive power resistors, and the circuit design is complic...

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): H02M3/338H02M3/335H01F13/00H03H11/04
CPCY02B70/10
Inventor 辛帅赵峰
Owner DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com