Tap inductor-type Z source inverter

A tapped inductor and source inverter technology, which is applied in electrical components, conversion devices for converting AC power input to DC power output, and output power, etc. Inverter performance and other issues

Inactive Publication Date: 2016-11-16
山东舜博信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many defects in the existing Z-source topology: 1. The boosting capability is limited. To improve the boosting capability, it is necessary to increase the direct duty cycle, which will inevitably reduce the ...

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  • Tap inductor-type Z source inverter
  • Tap inductor-type Z source inverter
  • Tap inductor-type Z source inverter

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Embodiment Construction

[0063] In order to facilitate those skilled in the art to better understand the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The following is only exemplary and does not limit the protection scope of the present invention.

[0064] Such as figure 1 As shown, the tapped inductance type Z source inverter of the present invention includes a DC power supply U dc and three-phase inverter, also includes inductive tap Z source network, DC power U dc The output end of the inductance tap Z source network is connected to the input end of the inductance tap Z source network, the output end of the inductance tap Z source network is connected to the input end of the three-phase inverter, and the output end of the three-phase inverter is connected to the grid or load. The inductor tapped Z source network consists of tapped inductor L t , Diode D in , Diode D 1 , Diode D 2 , cap...

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Abstract

The invention discloses a tap inductor-type Z source inverter, which comprises a DC power supply Udc, a three-phase inverter and an inductor tap Z source network, wherein the output end of the DC power supply Udc is connected with the input end of the inductor tap Z source network; the output end of the inductor tap Z source network is connected with the input end of the three-phase inverter; the output end of the three-phase inverter is connected with a power grid or a load; the inductor tap Z source network comprises a tap inductor Lt, a diode Din, a diode D1, a diode D2, a capacitor C1, a capacitor C2 and an inductor L3; and the tap inductor Lt comprises a winding N1 and a winding N2. The tap inductor-type Z source inverter can be used in situations of power generation and grid connection of new energy sources and motor drive and has the advantages of high step-up ratio, small capacitance voltage stress, high DC voltage utilization rate, small start impact and the like.

Description

technical field [0001] The invention relates to a tapped inductance type Z-source inverter, which belongs to the technical field of inverter circuits. Background technique [0002] Traditional inverter circuits are divided into two types: voltage source and current source. However, these two types of inverters have the following common shortcomings. They are either step-up or step-down converters, rather than boost / Step-down converters; and their ability to resist electromagnetic interference is poor, and when the bridge arm is short-circuited or open-circuited due to electromagnetic interference, it is easy to cause damage to the converter. Therefore, in 2002, Professor Peng Fangzheng of Michigan State University in the United States proposed a new type of inverter, which is a Z-source inverter. Z-source inverter provides a new idea and theory, which can overcome the deficiencies of traditional voltage source and current source inverters. [0003] Since the Z-source inve...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCH02M7/5387
Inventor 梁勇李长云谢小丽
Owner 山东舜博信息技术有限公司
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