A Full-Bridge Soft-Switching DC Converter

A DC converter and soft switching technology, applied in the direction of converting DC power input to DC power output, converting equipment with intermediate conversion to AC power, converting AC power input to DC power output, etc., can solve the problem of increasing the size and complexity of the converter. It can solve the problems of reliability, power device stress rise, harsh realization conditions, etc., to achieve the effect of reliable realization conditions, improved reliability, and simple circuit realization.

Inactive Publication Date: 2011-12-28
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional soft-switching technology of phase-shifted full-bridge converter needs to add additional resonant inductance or resonant capacitor, but this method will not only increase the size and complexity of the converter, but also increase the stress of

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
  • A Full-Bridge Soft-Switching DC Converter
  • A Full-Bridge Soft-Switching DC Converter
  • A Full-Bridge Soft-Switching DC Converter

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0016] Such as figure 1 As shown, the full-bridge soft-switching DC converter is powered by the input power V in , Switch tubes Q1-Q4, isolation transformer TX1, auxiliary switch tubes Q5-Q6, secondary side synchronous rectifier switch tubes Q7-Q8, output inductor L1, output filter capacitor C1, and load R1. The driving waveform of the auxiliary switching tube is consistent with the driving signal of the secondary side synchronous rectification switching tube, which is a complementary square wave signal with a duty cycle of approximately 50%. A dead zone is inserted between the auxiliary switching tubes to prevent commonality. figure 1 D in Q5 , C Q5 Is the parasitic diode and parasitic capacitance of the switch Q5, D Q6 , C Q6 It is the parasitic diode and parasitic capacitance of the switch tube Q6. It should be pointed out that the sam...

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 full-bridge soft-switching DC converter, which includes a transformer primary circuit and a transformer secondary circuit. The primary circuit includes an input power supply, first to fourth switch tubes, and an isolation transformer primary winding; wherein the first The first switch tube and the third switch tube, the second switch tube and the fourth switch tube respectively form two half-bridge circuits, and the two ends of the two half-bridge circuits are respectively connected to the positive pole and the negative pole of the input power supply, and the primary side of the isolation transformer The two ends of the winding are respectively connected to the middle points of the two half-bridge circuits; the first and second clamping switch tubes are sequentially connected in series between the two bridge arms of the two half-bridge circuits. In the present invention, by using the synchronous rectification driving signal of the secondary side to control the switching time of the two auxiliary switching tubes of the full-bridge converter, the collected leakage inductance energy of the primary-side transformer can be released within the dead time, and the full-bridge converter main The ZVS soft switching of the switching tube has low EMI interference and high efficiency.

Description

technical field [0001] The invention relates to a full-bridge soft-switching high-efficiency electric energy conversion device, in particular to a medium and small power direct current converter applied to low output voltage and high output current occasions. Background technique [0002] In order to reduce the size of the switching converter, the trend of high frequency switching power supply is becoming more and more obvious. However, when the switching speed increases, the loss of the power switch tube device increases sharply, which not only brings about problems such as EMI and thermal stress, but also reduces the reliability of the converter itself. In order to improve the switching frequency and reduce the switching loss, the soft switching technology of ZVS and ZCS has become the mainstream technology of switching power supply, and has greatly improved the working efficiency of switching power supply. The traditional soft-switching technology of phase-shifted full-b...

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): H02M3/28H02M3/335H02M7/217H02M1/44
CPCY02B70/1491Y02B70/1475Y02B70/10
Inventor 周岩
Owner NANJING UNIV OF POSTS & TELECOMM
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