Method for solving magnetic bias

A technology of biasing and blocking capacitors, applied in the field of biasing, can solve the hidden dangers of circuit safety, transformer saturation current, biasing and other problems, and achieve the effect of ensuring high-reliability operation, suppressing further deterioration, and improving reliability.

Active Publication Date: 2020-12-04
SHENZHEN WINLINE TECH
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has a good effect in solving the case of driving asymmetry and slowly changing cumulative bias. For some special working conditions, such as sudden full load or sudden unloading, the calculation result of the loop will cause the duty cycle to change rapidly. The duty cycle of each beat is different. Since the duty cycle changes rapidly, the magnetic bias may be very serious within a few or dozens of switching cycles. The transformer is saturated an

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
  • Method for solving magnetic bias
  • Method for solving magnetic bias
  • Method for solving magnetic bias

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0008] In order to realize the technical solution of the present invention and make it easy for more engineers and technicians to understand and apply the present invention, how to solve the bias magnetization will be further described with reference to specific embodiments.

[0009] The specific implementation strategy of the present invention is as follows:

[0010] like figure 1 The three-level phase-shifted full-bridge topology is shown. Usually, in order to prevent magnetic bias, a DC blocking capacitor needs to be connected in series in the transformer excitation circuit. The fundamental purpose of the DC blocking capacitor is to solve the magnetic bias to a certain extent. , the stronger the ability to suppress bias magnetism, but the excessively large DC blocking capacitor will increase the cost and volume, and in the case of output dynamic load, the duty cycle changes rapidly, which is more likely to generate bias magnetism, resulting in transformer saturation. The l...

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 provides a method for solving magnetic bias. By adopting the method, low-speed adjustment can be conducted under the condition that magnetic bias is not serious, thereby guaranteeing that magnetic bias is prevented under most working conditions, and output external characteristics are not affected; and under the condition of severe magnetic bias, the capacitor voltage is rapidly discharged through a blocking capacitor voltage discharging circuit, further deterioration of the magnetic bias is inhibited, and high-reliability work of the system is guaranteed. The method is suitablefor all topologies with magnetic bias risks, completely solves the problem of magnetic bias generation through a software and hardware combination mode, and improves the reliability.

Description

technical field [0001] The invention relates to the field of high-frequency switching power supply and electric vehicle charging module, in particular to a method for solving bias magnetism. Background technique [0002] At present, there are many topologies in the power supply field, and many new architectures (including two-level, three-level and multi-level full-bridge topologies) are derived from the full-bridge topology as the basic structure. In the high-power field, the phase-shifted full bridge and dual active bridge (bidirectional topology) schemes are widely used. The common characteristics of these topologies are high frequency, isolation and transformer work in quadrants 1 and 3. Ideally, 1, The 3-quadrant drive is completely symmetrical, and there is no magnetic bias phenomenon in the transformer in a complete cycle. However, in the actual circuit, due to the difference in electronic components and the timing accuracy of the software control strategy, there will...

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): H02M1/40H02M1/32H02M1/08H02M1/088H02M3/335
CPCH02M1/40H02M1/32H02M1/08H02M1/088H02M3/33569
Inventor 陈小平李晨光付加友郭振宇张海东朱建国
Owner SHENZHEN WINLINE TECH
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