I-shaped three-level soft switching circuit and corresponding triphase conversion circuit and current converter
A conversion circuit, three-level technology, applied in the direction of output power conversion device, high-efficiency power electronic conversion, conversion of AC power input to DC power output, etc., can solve the problem of high cost of soft switching, reduced circuit reliability, and large number of components and other issues, to achieve the effect of fewer components, improve circuit reliability, and reduce costs
Active Publication Date: 2019-02-19
KEHUA DATA CO LTD +1
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In some existing schemes, two resonant capacitors and one resonant inductor are set on the basis of the I-type three-level conversion circuit, and a corresponding diode is configured for each resonant capacitor as a discharge path to realize soft switching. Configure 4 diodes, 2 resonant capacitors, and 1 resonant inductor, the number of components required is large, making the cost of soft switching higher and the reliability of the circuit reduced
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
[0054] The core of the invention is to provide an I-type three-level soft switching circuit, which realizes soft switching, effectively reduces costs and improves circuit reliability.
[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0056] Please refer to figure 2 as well as image 3 , figure 2 It is a schematic structural diagram of an I-type three-level soft switching circuit in a specific embodiment of the present invention. In this embodiment, the...
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 an I-shaped three-level soft switching circuit which comprises four switching devices in sequential serial connection, a second energy storing element, a first energy storing element, a first diode, a second diode, a first inductor and a capacitance part. Each switching device comprises a controlled switch tube and an antiparallel diode, and the first end of the first inductor is connected with the second end of the first energy storing element while the second end of the same is connected with an anode of the first diode; the capacitance part comprises a first capacitor with the first end connected with the second end of the first switching element and the second end connected with the second end of the second switching element and a second capacitor with the firstend connected with the first end of the third switching element and the second end connected with the first end of the fourth switching element; or the capacitance part comprises a target capacitor with the first end connected with the second end of the first switching element and the second end connected with the first end of the fourth switching element. The invention further discloses a triphase conversion circuit and a current converter which have corresponding advantages.
Description
technical field [0001] The invention relates to the technical field of electric energy conversion, in particular to an I-type three-level soft switching circuit, a corresponding three-phase conversion circuit and a current conversion device. Background technique [0002] The I-type three-level conversion circuit has the advantages of small harmonics and high efficiency, and is used in many occasions. See figure 1 , is a structural schematic diagram of an I-type three-level conversion circuit in the prior art, the first switching device, the second switching device, the third switching device and the fourth switching device are connected in series in sequence, and the first end of the first switching device is connected to the positive The bus bar is connected, and the second terminal of the fourth switching device is connected to the negative bus bar. [0003] The second end of the first switching device is connected to the first end of the second switching device, and its...
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): H02M7/483
CPCH02M7/483Y02B70/10
Inventor 黄文俊易龙强林伟民叶永发
Owner KEHUA DATA CO LTD