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

Zero-voltage switching synchronous rectification Boost circuit, zero-voltage switching Boost circuit and control method thereof

A zero-voltage switching and circuit technology, applied in control/regulation systems, high-efficiency power electronic conversion, electrical components, etc., can solve problems such as reverse recovery, excessive switching losses in high-frequency operation, and achieve high light-load efficiency and application. Simple, realize the effect of light-load frequency reduction work

Active Publication Date: 2018-08-10
MORNSUN GUANGZHOU SCI & TECH
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a zero-voltage switch synchronous rectification Boost circuit, a zero-voltage switch Boost circuit and a control method thereof, to solve the problem of excessive switching loss in high-frequency operation, and to solve the problem of inductive current continuous rectification diodes. Recovery problem, but also solve the EMI problem caused by hard switching

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
  • Zero-voltage switching synchronous rectification Boost circuit, zero-voltage switching Boost circuit and control method thereof
  • Zero-voltage switching synchronous rectification Boost circuit, zero-voltage switching Boost circuit and control method thereof
  • Zero-voltage switching synchronous rectification Boost circuit, zero-voltage switching Boost circuit and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0044] image 3 Shown is the schematic diagram of Embodiment 1 of the ZVS Boost circuit according to the present invention, similar to the traditional Boost circuit, the ZVS Boost circuit 30 includes a boost inductor 31, a main switch tube 32, a rectifier diode 33, and an output filter capacitor 34 and a control circuit 36, the output voltage Vout at both ends of the output filter capacitor 34 supplies power to the load 35; the control circuit 36 ​​generates a feedback voltage signal according to the output voltage Vout and adjusts the duty cycle of the main switching tube 32 according to the feedback voltage signal; One end of the piezoelectric inductor 31 is connected to the input voltage +, the other end of the boost inductor 31 is connected to the drain of the main switching tube 32, the source of the main switching tube 32 is connected to the input voltage -, and the gate of the main switching tube 32 is connected to the control circuit. All the way output. Different fro...

no. 2 example

[0064] Figure 8-1 The schematic diagram and control block diagram of the second embodiment of the present invention are shown. The difference from the first embodiment is that a CS current detection circuit is added between the source of the main switch 32 and the control circuit.

[0065] This embodiment is mainly embodied in the light load control, sampling the output voltage Vout to control the stability of the output voltage, and sampling the peak current of the main switching tube to realize the light load control. When the load decreases, the peak current of the main switching tube decreases, and when the load decreases to a certain extent, the circuit enters the DCM mode to work. When the peak current decreases to a certain level, keep the minimum peak current from the control and no longer decrease, that is, the minimum peak current control, that is to say, when the load continues to decrease, the output of the converter is stabilized by reducing the operating frequen...

no. 3 example

[0067] Figure 9It shows the principle diagram according to the third embodiment of the present invention, that is to say, the zero-voltage switching circuit 40 of the present invention is also applicable to the Boost circuit of synchronous rectification, and the difference from Embodiment 1 is that the rectifier diode 33 is replaced by synchronous rectification Switch tube 81, the input terminal of the zero voltage switching circuit 40 is connected to the drain of the main switch tube 32, the output terminal is connected to the source of the synchronous rectification switch tube 81, and the drain of the synchronous rectification switch tube 81 is connected to the output filter capacitor 34 positive. In addition, this embodiment also includes a control circuit 86. The control circuit 86 outputs three-way driving signals to control the switching of the main switching tube 32, the auxiliary switching tube 42, and the synchronous rectification switching tube 81, wherein the main ...

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 present invention provides a zero-voltage switching synchronous rectification Boost circuit, a zero-voltage switching Boost circuit and a control method thereof. An auxiliary resonance circuit isconnected in series with a rectifying circuit of a main power circuit, when a main power switch tube is switched off, the current of a Boost inductor is employed to achieve zero-voltage conduction ofan auxiliary switch tube, resonances of a resonance capacitor and a resonance inductor are employed to achieve rapid increasing of the current of the resonance inductor and prompt the current of the resonance inductor to be larger than the current of the Boost inductor, a diode connected in parallel with the resonance capacitor is employed to perform follow current of the current of the resonanceinductor to ensure that the voltage of the resonance capacitor cannot be inversed and the current of the resonance inductor cannot be rapidly reduced after reaching the maximum value. After the auxiliary switch tube is switched off, the difference of the resonance current and the Boost inductor current is employed to achieve zero-voltage opening of the main switch tube.

Description

technical field [0001] The invention relates to power electronic circuits, in particular to a zero-voltage switch Boost circuit and a control method thereof. Background technique [0002] A conventional power supply block diagram such as figure 1 As shown, the bridge rectifier circuit 11 converts the AC input into a DC voltage and supplies it to the Boost converter 20, and the Boost converter provides a power factor correction function to meet industry standards or simply converts a fluctuating voltage to a stable voltage Or a voltage range with a smaller variation range, the DC / DC converter in the subsequent stage converts the output voltage of the Boost converter to the voltage required by the load and realizes the isolation function. Usually, the AC input range is 85-265VAC, and the regulated voltage value of the Boost converter is 400V or the regulated voltage range is 200-400V. The narrower the output voltage range of the front-stage Boost circuit, the simpler the des...

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): H02M3/158H02M1/088
CPCH02M1/088H02M3/158H02M1/0058H02M3/156H02M1/342Y02B70/10
Inventor 袁源
Owner MORNSUN GUANGZHOU SCI & TECH
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