Single-stage AC-DC resonant converter
A resonant converter, a single-stage technology, applied in the direction of converting DC power input to DC power output, converting AC power input to DC power output, instruments, etc., can solve problems affecting power supply quality, grid pollution, etc., and improve electromagnetic compatibility problems, improving efficiency, and reducing the effect of voltage drift
Inactive Publication Date: 2015-07-15
SHAANXI UNIV OF SCI & TECH
View PDF5 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] Energy conversion efficiency has become a research hotspot in recent years. The power factor correction circuit AC-DC conversion device is a kind of energy conversion circuit and is widely used in switching power supplies, such as power operating power supplies and distributed power supplies. It is a connecting bridge The bridge between rectifier and power grid, and the use of bridge rectifier will generate non-negligible harmonics and reactive power in the power grid, which will pollute the power grid and affect the quality of power supply. Therefore, how to suppress harmonics and improve electromagnetic compatibility has become a research hotspot, and The power factor correction circuit can effectively solve the above problems, so with the application of power electronics more and more widely
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] see figure 1 , the front stage of the present invention adopts an AC-DC conversion circuit, including an AC power supply, a bridge rectifier, an input inductance for storing energy, a switch tube and a public capacitor, and the rear stage adopts an LLC resonant circuit, that is, a DC-DC conversion circuit, including Resonant tank, transformer and rectifier filter circuit.
[0027] The specific circuit structure includes AC power supply, bridge rectifier, input inductor Lin, first switch tube Q1, second switch tube Q2, public capacitor Cb, resonant capacitor Cr, resonant inductor Lr, excitation inductor Lm, transformer T, first rectifier Diode D1, second rectifier diode D2, output filter capacitor Co, output resistor Ro;
[0028] The AC power supply is connected to the bridge rectifier, the bridge rectifier is connected to the input inductor and the s...
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
Login to View More Abstract
The invention discloses a single-stage AC-DC resonant converter which controls two converters by a control signal, wherein a prime converter is a power factor correction circuit and a post converter is an LLC resonant DC-DC converter; a prime power factor correction circuit is a booster circuit and a post power factor correction circuit is a DC converter. The two converters are connected together to reduce the loss of the whole system; the two converters are connected by a public capacitor which plays a balance role between the two converters so as to reduce voltage drift; due to the two converters, the public capacitor can keep balance in a voltage-resisting area and the circuit can run normally. In the structure, the prime booster circuit has the advantages of simple structure and small loss, and the post LLC resonant converter has the advantages of simple structure, low noise and loss, and high conversion efficiency.
Description
technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a single-stage AC-DC resonant converter. Background technique [0002] Energy conversion efficiency has become a research hotspot in recent years. Power factor correction circuit AC-DC conversion device is a kind of energy conversion circuit, which is widely used in switching power supply, such as power operation power supply and distributed power supply. It is a connecting bridge The bridge between rectifier and power grid, and the use of bridge rectifier will generate non-negligible harmonics and reactive power in the power grid, which will pollute the power grid and affect the quality of power supply. Therefore, how to suppress harmonics and improve electromagnetic compatibility has become a research hotspot. The power factor correction circuit can effectively solve the above problems, so it is becoming more and more widely used with the applicatio...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/162H02M3/338H02M1/42
CPCH02M1/4208H02M1/44H02M3/338H02M7/217Y02B70/10
Inventor 史永胜高丹阳郝鹏飞宁青菊胡双
Owner SHAANXI UNIV OF SCI & TECH