Unlock instant, AI-driven research and patent intelligence for your innovation.

Single-phase half-bridge five-level inverter and application circuit thereof

An inverter, five-level technology, applied in circuit devices, AC network circuits, photovoltaic power generation, etc., can solve the problems of large number of capacitors, large losses, large volume, etc., and achieve small size, low loss, and fewer semiconductor devices. Effect

Active Publication Date: 2012-04-25
SUNGROW POWER SUPPLY CO LTD
View PDF5 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] figure 2 The capacitors in the topology shown can play the role of voltage equalization, but the disadvantage is that the number of capacitors used is large
[0009] To sum up, the two five-level inverter topologies in the prior art both use more semiconductor devices, resulting in larger volume, more losses, and lower efficiency

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
  • Single-phase half-bridge five-level inverter and application circuit thereof
  • Single-phase half-bridge five-level inverter and application circuit thereof
  • Single-phase half-bridge five-level inverter and application circuit thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0077] see image 3 , which is a topology diagram of a single-phase half-bridge five-level inverter provided by an embodiment of the present invention.

[0078] The single-phase half-bridge five-level inverter provided by the embodiment of the present invention includes: a first switching tube T1, a second switching tube T2, a third switching tube T3, a fourth switching tube T4, a fifth switching tube T5, a The six switching tubes T6, the seventh switching tube T7 and the eighth switching tube T8; each of the switching tubes is connected with a diode in reverse parallel, and T1-T8 are respectively connected with diodes D1-D8 in reverse parallel.

[0079] The positive terminal of the DC power supply is connected to the negative termina...

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 provides a single-phase half-bridge five-level inverter and an application circuit thereof. The single-phase half-bridge five-level inverter comprises eight switching tubes and eight diodes, and does not comprise clamping diodes and flying capacitors in the prior art. In the prior art, the clamping diodes in the five-level inverter cannot be omitted because the diodes not only provide passages for current and prevent short circuit of capacitors. In the five-level inverter provided by the invention, passages are provided for current by utilizing the diodes which are reversely connected with the eight switching tubes in parallel, so that the short circuit of the capacitors is prevented. Therefore, the inverter has fewer semiconductor devices, lower loss, higher efficiency, small volume and low cost.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a single-phase half-bridge five-level inverter and an application circuit thereof. Background technique [0002] In medium-voltage and large-capacity applications, multi-level inverters are widely used. The current five-level inverters are mainly diode-clamped and flying capacitor structures. To be introduced below. [0003] see Figure 1a , which is a topology diagram of a diode-clamped five-level inverter provided in the prior art. [0004] Figure 1a Shown is the topology of a half-bridge five-level inverter. Diodes are used for voltage clamping for each switching tube. For example, the first diode DB1 is used to clamp the potential of the lower end of the switching tube T1 to the lower end of the first capacitor C1; the second diode DB2 is used to clamp the potential of the lower end of the switching tube T5 to the lower end of the first capacitor C1. The other ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/5387
CPCH02M7/487Y02E10/563H02J3/383H02J2300/24H02J3/381Y02E10/56H02M7/4837H02J3/388
Inventor 汪洪亮岳秀梅倪华赵为
Owner SUNGROW POWER SUPPLY CO LTD