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

Flyback converter and power supply system

A flyback converter and circuit technology, applied in control/regulation systems, instruments, DC power input conversion to DC power output, etc., to achieve the effects of reducing difficulty, suppressing output cross-adjustment, and facilitating matching

Active Publication Date: 2014-05-14
HUAWEI DIGITAL POWER TECH CO LTD
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a flyback converter and power supply system to solve the problem of cross-regulation between output windings in multi-output applications, so as to suppress flyback conversion without increasing costs and losses output cross-adjustment and improve circuit efficiency

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
  • Flyback converter and power supply system
  • Flyback converter and power supply system
  • Flyback converter and power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 The circuit diagram of the flyback converter secondary circuit provided for Embodiment 1 of the present invention, such as figure 1 As shown, the flyback converter includes a primary circuit and a secondary circuit, wherein the secondary circuit includes four output circuits, and each output circuit includes a first secondary winding N S , the second secondary winding L S , Secondary winding output leakage inductance L Sσ , series inductor L, rectifier tube D S , output capacitance C S and the resistor R L .

[0027] Taking the first output circuit as an example, the first secondary winding N in the first S1 , the second secondary winding L S1 , Secondary winding output leakage inductance L S1σ , series inductance L 1 , rectifier tube D S1 with output capacitor C S1 series, the output capacitor C S1 with the resistor R L1 in parallel, the resistor R L1 Connect one end to the output voltage V o1 , the resistor R L1 The other end is grounded. The...

Embodiment 2

[0030] figure 2 The circuit diagram of the secondary circuit of the flyback converter provided by Embodiment 2 of the present invention. The secondary circuit of the flyback converter provided in this embodiment is based on the previous embodiment. If there are two output circuits with output voltage V o Common ground, and the output voltage V of the first output circuit in the two output circuits o higher than the output voltage V of the second output circuit o , then the first secondary winding N of the first output circuit S The negative terminal is connected to the rectifier tube D of the second output circuit S The cathode of the DC superposition technique can be used to save the series inductance L of the first output circuit.

[0031] The following takes the third output circuit and the fourth output circuit as examples for explanation, as shown in figure 2 As shown, the output voltage V of the third output circuit o3 and the output voltage V of the fourth output...

Embodiment 3

[0034] image 3 The circuit diagram of the primary side circuit of the flyback converter provided by Embodiment 3 of the present invention. The flyback converter of this embodiment is based on Embodiment 1 or Embodiment 2. The primary side circuit is an active clamping circuit, including Primary winding N P , Primary inductance L P , Primary leakage inductance L Pσ , switch tube (S P1 , S P2 ), capacitance C P , rectifier tube (D P1 、D P2 ) and resistor R, the switch S P2 with rectifier D P2 After parallel connection with capacitor C P connected in series to form an active clamp circuit 300, the primary winding N P , Primary inductance L P and the primary side leakage inductance L Pσ After being connected in series with the active clamp circuit 300 in parallel, one end is connected to the input voltage V in , one end is in turn connected with the switch tube S P1 with rectifier D P1 The parallel circuit and the resistor R are connected in series.

[0035] ima...

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

An embodiment of the invention provides a flyback converter and a power supply system. The flyback converter comprises a primary side circuit and a secondary side circuit, wherein the secondary side circuit comprises two or more output circuits. Each output circuit comprises a first secondary side winding, a second secondary side winding, a secondary side winding output leakage inductor, a series inductor, a rectifier tube, an output capacitor and a resistor, wherein the first secondary side winding, the second secondary side winding, the secondary side winding output leakage inductance, the series inductor and the rectifier tube are connected with the output capacitor serially, the output capacitor is connected with the resistor parallelly, one end of the resistor is connected with output voltage, the other end of the resistor is connected with the ground, and the series inductor is of a magnetic integration structure. Therefore, output cross regulation of the flyback converter is inhibited, and difficulty in inductor matching, design and manufacture is reduced.

Description

technical field [0001] Embodiments of the present invention relate to power electronics technology, in particular to a flyback converter and a power supply system. Background technique [0002] In low-power applications, flyback converters are widely used in the industry. Because flyback converters have the characteristics of wide input voltage range, fewer components, low cost, and isolation between output and input, they are often used in applications that require multiple outputs. . [0003] The flyback converter takes the primary and secondary sides of the isolation transformer as the boundary, and can be divided into two parts: the primary circuit and the secondary circuit. The primary side circuit mainly includes transformer primary side inductance, power switch tube and primary side leakage inductance energy processing circuit. The secondary circuit mainly includes a secondary inductor, a rectifier circuit and a filter circuit. Among them, the leakage inductance of...

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): H02M3/335
Inventor 胡智伦郭文康
Owner HUAWEI DIGITAL POWER TECH CO LTD
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