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High-gain single-phase inverter, control method and three-phase inverter

A single-phase inverter, high-gain technology, applied in the field of control methods and three-phase inverters, high-gain single-phase inverters

Active Publication Date: 2021-04-09
SHENZHEN GROWATT NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a high-gain single-phase inverter to solve the problem that the existing inverter can only achieve a maximum gain of 1 times

Method used

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  • High-gain single-phase inverter, control method and three-phase inverter
  • High-gain single-phase inverter, control method and three-phase inverter
  • High-gain single-phase inverter, control method and three-phase inverter

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Embodiment Construction

[0030] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Several embodiments of the invention are presented in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

[0032] Unless otherwise defined, ...

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PUM

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Abstract

The invention provides a high-gain single-phase inverter, comprising a DC power supply, a first switch tube, a first bidirectional switch, a second bidirectional switch, a first inductor, a second inductor, a first capacitor, and a second capacitor. The above-mentioned high-gain single-phase inverter works in the first operating mode when the desired gain is less than 1. At this time, the Semi-Z source inverter works in the step-down mode. When the gain is greater than 1, this When the Semi‑Z source inverter cannot meet the working conditions, it switches to the second working mode, and the boost circuit continues to work, thereby achieving high gain. The invention also provides a control method of a high-gain single-phase inverter and a three-phase inverter.

Description

technical field [0001] The invention relates to the technical field of inverters, in particular to a high-gain single-phase inverter, a control method and a three-phase inverter. Background technique [0002] Inverters are divided into voltage source inverters and current source inverters, while most of the traditional voltage source inverters are step-down circuits, that is, the output AC voltage is lower than the input DC voltage. Therefore, many applications at present are to add a first-stage boost circuit (such as a Boost circuit) before the inverter circuit, so that the inverter becomes a two-stage structure, which will increase the volume and reduce the system stability. Therefore, a single-stage high gain is studied. The inverter is very important, so some scholars have proposed the Z-source inverter, which is an impedance network composed of two inductors and two capacitors, which can realize the function of boosting, so it has been widely studied. [0003] For the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/537H02M7/49H02M7/493
CPCH02M7/49H02M7/493H02M7/537H02M1/0038
Inventor 吴良材汪洪亮丁永强
Owner SHENZHEN GROWATT NEW ENERGY TECH