Boost and buck integrated bridge-free power factor correction (PFC) circuit

A circuit, single-stage technology, used in electrical components, high-efficiency power electronic conversion, output power conversion devices, etc., can solve the problems of high conduction loss, low circuit efficiency, and high cost, reducing conduction loss and improving efficiency. , the effect of reducing costs

Inactive Publication Date: 2011-04-06
FUZHOU UNIVERSITY
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The correction effect of this PFC circuit is relatively ideal, but when it is working, the rectifier bridge and the power factor correction stage circuit have three semiconductor power devices conducting at the same time, the

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
  • Boost and buck integrated bridge-free power factor correction (PFC) circuit
  • Boost and buck integrated bridge-free power factor correction (PFC) circuit
  • Boost and buck integrated bridge-free power factor correction (PFC) circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with drawings and embodiments.

[0019] Refer to attached figure 1 , a specific implementation circuit diagram of a bridgeless single-stage PFC circuit integrated with a BOOST circuit and a BUCK circuit proposed by the present invention, including an AC input source Vin, a power MOSFET S1, a power MOSFET S2, a diode D1, a diode D2, and a diode D3, Diode D4, diode D5, diode D6, diode D7, energy storage capacitor C1, energy storage capacitor C2, inductance L1, inductance L2 and load equivalent resistance R1.

[0020] figure 1 The bridgeless single-stage PFC circuit adopts such a connection mode: one end of the AC input source Vin is connected to the anode of the diode D1, the anode of the diode D3, the cathode of the diode D2 and the cathode of the diode D4; the other end of the AC input source Vin Connect one end of the inductor L1; the other end of the inductor L1 is connected to the source of the p...

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 boost and buck integrated bridge-free power factor correction (PFC) circuit, which comprises an alternating current input source Vin, a power metal-oxide-semiconductor field effect transistor (MOSFET) tube S1, a power MOSFET tube S2, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, an energy storage capacitor C1, an energy storage capacitor C2, an inductor L1, an inductor L2 and a load equivalent resistor R1 and is characterized in that: a bridge-free boost circuit and a buck circuit are combined through the power MOSFET tube S1, the energy storage capacitor C1 and the diode D7; the power MOSFET tube S1 serves as one of switches of the bridge-free boost circuit and also serves as a switching tube of the BUCK circuit; and the energy storage capacitor C1 serves as an output capacitor of the boost circuit to store energy transmitted by the boost circuit and serves as an input capacitor of the buck capacitor to supply energy to a load of the buck circuit. Compared with the prior art, the boost and buck integrated bridge-free PFC circuit has the main advantages that: 1, an input rectifier bridge is saved and conduction consumption is reduced; and 2, the PFC circuit and a backward direct current-direct current (DC-DC) circuit are used in combination, and just one controller can conduct power factor correction and output voltage adjustment functions at the same time, so that fewer devices are used, efficiency is improved, and cost is reduced.

Description

technical field [0001] The invention relates to a bridgeless single-stage power factor correction (PFC) circuit. More specifically, the present invention relates to a bridgeless single-stage PFC circuit integrated with a BOOST circuit and a BUCK circuit. Background technique [0002] With the rapid development of power electronic technology, various power electronic devices are widely used in power systems, industries, transportation and households. Rectifying and supplying DC from the AC grid is a basic conversion method widely used in power electronics technology. Traditional rectifiers and diodes or thyristors form uncontrolled or phase-controlled rectification circuits, which will generate a large number of current harmonics and reactive power. Harm. Its hazards are mainly manifested in the following three aspects: causing a decline in the quality of power supply; affecting the reliability of the power grid; causing a decrease in the utilization rate of electric energy...

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): H02M1/42
CPCY02B70/126Y02B70/10Y02P80/10
Inventor 林维明
Owner FUZHOU UNIVERSITY
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