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an inverter circuit

An inverter and circuit technology, applied in the field of electronic circuits, can solve the problems of large volume of low-pass filter and large total harmonic distortion rate, etc.

Active Publication Date: 2020-11-20
元山(济南)电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides an inverter circuit to solve the problems of large size and large total harmonic distortion rate of the existing low-pass filter

Method used

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Embodiment Construction

[0027] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0028] figure 2 The schematic diagram of the inverter circuit provided by the embodiment of the present application, image 3 It is a schematic diagram of the primary circuit of the inverter circuit provided in the embodiment of the present application, Figure 4 It is a schematic diagram of the secondary circuit of the inverter circuit provided in...

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Abstract

The invention discloses an inverter circuit to solve the problem that an existing low-pass filter is large in size. The inverter circuit comprises a first-stage circuit and a second-stage circuit. A first switch and a second switch in the first-stage circuit are connected with a power supply in series. One end of the first inductor is connected with the first switch and the second switch, and theother end is connected with a first capacitor and a second capacitor; one end of the first capacitor is connected with the power supply; and one end of the second capacitor is connected with the powersupply. The second-stage circuit comprises a plurality of sub-circuits; and each sub-circuit comprises a full-bridge switch group, a sub-module and an output capacitor. A third switch and a fourth switch in the sub-module are connected in series with the full-bridge switch group; one end of the third capacitor is connected with a third switch, and the other end of the third capacitor is connectedwith the fourth switch; one end of the second inductor is connected with the third switch and the fourth switch while the other end is connected with the first output capacitor; and one end of the output capacitor is connected with the second inductor, and the other end is connected with the full-bridge switch group.

Description

technical field [0001] The present application relates to the field of electronic circuits, in particular to an inverter circuit. Background technique [0002] An inverter is a power electronic device that converts direct current to alternating current and has a wide range of applications. For example, photovoltaic applications, motor drive applications, etc. [0003] At present, in the process of current conversion, the inverter usually adopts a sinusoidal pulse width modulation method to obtain power from a constant DC voltage source and generate an AC voltage whose amplitude is lower than that of the DC voltage source. Usually, the inverter needs to be used in combination with a low-pass filter, which processes the AC voltage generated by the inverter to adjust the square wave to a sine wave. [0004] However, since the traditional non-multilevel bridge inverter circuit can only generate a square wave with a fixed peak value and variable pulse width on the inverter side...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/537H02M7/5387H02M7/539H02M3/07
CPCH02M3/07H02M7/537H02M7/5387H02M7/539Y02E10/56
Inventor 周敏贾河顺刘圆圆李帅赵建国王含冠方帅
Owner 元山(济南)电子科技有限公司