Flying capacitor voltage-clamped multilevel inverter adopting novel three-terminal switching network
A flying capacitor and switching network technology, applied in the field of multi-level inverters, can solve the problems of inductance loss and large output harmonics
Inactive Publication Date: 2015-02-04
SOUTH CHINA UNIV OF TECH
View PDF10 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the inductance losses and output harmonics are still large
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
[0027] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but it is not intended to determine the key or important part of the present invention, nor is it intended to limit the scope of the present invention. With reference to the following description of the embodiments of the present invention in conjunction with the accompanying drawings, it will be easier to understand the above and other purposes, features and advantages of the present invention. of.
[0028] see Figure 1A , a flying capacitor voltage-clamped multilevel single-phase half-bridge inverter using a new three-terminal switch network, including: two input power supplies (V1, V2), two input filter capacitors (C1, C2) , four power switches (S1, S2, S3, S4) and their body diodes (D1, D2, D3, D4), an anti-phase coupled two-winding transformer T1, an output filter inductor L1 and an output filter capacitor C5 , four power diodes ...
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 flying capacitor voltage-clamped multilevel inverter using a novel three-terminal switching network. The flying capacitor voltage-clamped multilevel single-phase half-bridge inverter comprises four power switch tubes and body diodes thereof, two input filter capacitors, a reversely-coupled two-winding transformer, an output filter inductor, a filter capacitor, four power diodes and two flying capacitors. The flying capacitor voltage-clamped multilevel inverter can be extended into single-phase full-bridge inverter and three-phase bridge inverter circuits of two structures. A novel three-terminal switching network is adopted in the invention. Compared with a general two-level or traditional flying capacitor voltage-clamped multilevel inverter topology, no dead zone needs to be set between the power switch tubes of upper and lower bridge arms, the power switch tubes can be switched on to work simultaneously, and multi-level output is realized at an inverter neutral point. Therefore, the output voltage harmonic is improved, the size and volume of the output filter inductor are reduced, and the loss of switching devices is reduced. The system material cost is reduced, and the system performance of the inverter is improved.
Description
technical field [0001] The invention relates to a multilevel inverter, in particular to a flying capacitor voltage clamping type multilevel single-phase inverter and a three-phase inverter using a novel three-terminal switch network. Background technique [0002] Inverters convert direct current to alternating current. Inverters are an important part of uninterruptible power supplies (UPS) and new energy power generation systems such as wind energy, solar photovoltaic, and fuel cells. Conversion efficiency and output harmonics are the most important electrical indicators of the inverter. High conversion efficiency can reduce power loss, and low harmonics can improve power quality. [0003] The loss of power devices and output filter inductors in the inverter limits the improvement of inverter efficiency. At the same time, fierce market competition, rising prices of raw materials such as power switch tubes and steel and copper have brought great cost pressure to inverter ma...
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 IPC IPC(8): H02M7/487
CPCH02M7/487H02M7/4837
Inventor 谢运祥胡炎申
Owner SOUTH CHINA UNIV OF TECH