Intelligent sine-wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge

A voltage conversion circuit and intelligent technology, applied in the direction of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve the problems of low output voltage quality, low PF value, poor safety and reliability, etc., to improve the output voltage. Quality, meet power supply demand, and improve the effect of PF value

Inactive Publication Date: 2017-05-31
GUANGDONG BESTEK E COMMERCE CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability.
In practical applications, due to the high-speed switching of the swi

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
  • Intelligent sine-wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge
  • Intelligent sine-wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge
  • Intelligent sine-wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] The present invention will be described in more detail below in conjunction with the drawings and embodiments.

[0022] The invention discloses an intelligent sine wave voltage conversion circuit based on a PFC forward half bridge, which combines Figure 1 to Figure 5 As shown, it includes:

[0023] An input rectification filter unit 10, the input end of which is connected to the power grid for rectifying and filtering the grid voltage;

[0024] A PFC boosting unit 20, connected to the output end of the input rectifying and filtering unit 10, for boosting and converting the output voltage of the input rectifying and filtering unit 10;

[0025] An isolated two-tube forward converter 30 includes a first switching tube Q6, a second switching tube Q7, a first diode D3, a second diode D2, a third diode D5, and a fourth diode The drain of the first switching tube Q6 is connected to the output terminal of the PFC boost unit 20, and the source of the first switching tube Q6 is connect...

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 an intelligent sine-wave voltage conversion circuit based on a PFC (power factor correction) forward half-bridge. The circuit comprises an input rectifier filter unit, a PFC voltage boosting unit, an isolated two-transistor forward converter and an inversion reverse-phase unit, wherein the isolated two-transistor forward converter comprises a first switch tube, a second switch tube, a first diode, a second diode, a third diode, a fourth diode, a transformer and a filter inductor; the inversion reverse-phase unit comprises a fourth switch tube, a fifth switch tube, a third electrolytic capacitor, a fourth electrolytic capacitor and a first filter inductor, a grid of the fourth switch tube and a grid of the fifth switch tube are used for accessing two ways of PWM (pulse width modulation) pulse signals with opposite phases respectively, a source of the fourth switch tube is further connected to the front end of the first filter inductor, a negative pole of the third electrolytic capacitor is connected to a positive pole of the fourth electrolytic capacitor, and the rear end of the first filter inductor and the negative pole of the third electrolytic capacitor are taken as output ends of the inversion reverse-phase unit. With the adoption of the circuit, PF (power factor) value and output voltage quality can be improved.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent sine wave voltage conversion circuit based on a PFC forward half bridge. Background technique [0002] In the prior art, the intelligent buck-boost conversion device from AC to AC is also called a travel plug-in strip. In this device, the sine wave voltage conversion circuit is the key circuit, and it is a circuit that can realize AC-AC conversion. In the AC-AC conversion, it can realize the functions of step-up and step-down and stabilize the voltage and frequency. However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability. In practical applications, due to the high-speed switching of the switching tube during the voltage conversion process, there will be a certain high-frequency pulse signal on the output side of the circuit, which will affect the qu...

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): H02M5/458H02M1/42H02M1/12
CPCH02M1/126H02M1/4225H02M5/458H02M1/0067Y02B70/10
Inventor 侯涛
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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