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A t-type multilevel inverter circuit

A multi-level inverter and multi-level technology is applied in the direction of high-efficiency power electronic conversion, electrical components, and conversion of AC power input to DC power output. It can solve the problems of increased cost of multi-level inverters and achieve savings Quantity, reducing switching loss, and improving efficiency

Inactive Publication Date: 2019-03-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, multi-level inverters also have some unavoidable shortcomings. In order to generate more multi-level inverters, more power switching devices need to be used, which also leads to an increase in the cost of multi-level inverters, which also becomes a constraint The main factor for the development of multi-level inverters; therefore, scholars have proposed various multi-level inverter circuit topologies in the past few years, hoping to use fewer switch tubes to generate more levels

Method used

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  • A t-type multilevel inverter circuit
  • A t-type multilevel inverter circuit
  • A t-type multilevel inverter circuit

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Embodiment Construction

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0023] A T-type multilevel inverter circuit of the present invention is as follows: figure 1 As shown, it includes: a T-type three-level circuit 1 , a switch tube 2 , a T-type three-level circuit 3 , a paired anti-series switch tube 4 , and a filter circuit 5 . In the T-type three-level circuit, the input power supply is composed of two equal-value sequential series-connected voltage sources, that is, the negative electrode of one voltage source is connected to the positive electrode of the ...

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Abstract

The invention discloses a T-type multi-level inverter circuit, which comprises two T-type three-level circuits, two switch tubes, two pairs of anti-series switch tubes and an LC filter circuit; two T-type three-level circuit input The opposite polarity ends of the power supply are connected through two switch tubes, and two pairs of anti-series switch tubes connect the input power of the T-type three-level circuit to the same polarity end, and the LC filter circuit is connected to the inverter bridge arms of the two T-type three-level circuits On the central node, the ratio of the input power supply voltages of the two T-shaped three-level circuits is 5. The invention uses fewer switching tubes to generate more levels, greatly reduces the number of power switching tubes, further reduces the cost of the multi-level inverter, improves the efficiency of the inverter, and reduces the switching frequency at the same time.

Description

technical field [0001] The invention relates to a T-type multilevel inverter circuit, which belongs to the technical field of power electronic inverters. Background technique [0002] The inverter is an indispensable power conversion unit in the industrialized society, and the multi-level inverter has always been an extremely important power electronic device, which has been deeply studied and widely used. The multi-level inverter has many advantages such as low output harmonic content, high output level number, low voltage or current stress of the device, high efficiency, modularity, good compatibility, etc. Source filtering, electric vehicles and other fields have been widely used, and it has significant advantages over two-level inverters in medium and high voltage power inverter occasions. However, multi-level inverters also have some inevitable shortcomings. In order to generate more multi-levels, more power switching devices need to be used, which also leads to an inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483
CPCH02M7/483H02M1/0054Y02B70/10
Inventor 温海涛马运东孙明波陈肖逸朱爱云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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