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Single-switch Boost three-level converter based on boost formula

A three-level, converter technology, applied in the field of boost converters, can solve the problems of increasing the number of circuit devices, complicated circuit control, low efficiency, etc. Effect

Active Publication Date: 2021-04-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present application provides a single-switch Boost three-level converter based on a boost formula, which is used to solve the problem of increasing the number of circuit components, complicating circuit control, and low efficiency caused by existing cascaded or dual-switch converters. costly technical issues

Method used

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  • Single-switch Boost three-level converter based on boost formula
  • Single-switch Boost three-level converter based on boost formula
  • Single-switch Boost three-level converter based on boost formula

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Embodiment Construction

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. 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.

[0033] For ease of understanding, see figure 1 , an embodiment of a single-switch Boost three-level converter based on a boost formula provided by the present application, comprising: a first subcircuit and a second subcircuit, the first subcircuit is connected in series with the second subcircuit .

[0034] The first sub-circuit includes a primary winding of a c...

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Abstract

The invention discloses a single-switch Boost three-level converter based on a boost formula. The converter comprises a first sub-circuit and a second sub-circuit, wherein the first sub-circuit and the second sub-circuit are connected in series; the first sub-circuit comprises a coupling inductor primary winding, a switching tube, a fourth diode, a sixth diode, a fourth capacitor and a sixth capacitor; the second sub-circuit comprises a coupling inductor secondary winding, a first diode, a second diode, a third diode, a fifth diode, a first capacitor, a second capacitor, a third capacitor, a fifth capacitor, an output rectifier diode and a voltage stabilizing capacitor; and the switching tube is used for controlling the connection state of the first sub-circuit and the second sub-circuit to form the boost three-level converter. The converter can solve technical problems that the number of circuit devices is increased, circuit control is complicated, efficiency is not high, and the cost is high due to an existing converter based on cascade connection or double switches.

Description

technical field [0001] The present application relates to the technical field of boost converters, in particular to a single-switch Boost three-level converter based on a boost formula. Background technique [0002] Solar energy and wind energy have been widely used, but how to achieve grid-connected operation of these systems and meet the high voltage requirements in the grid is still the most important issue. DC-DC converters with high voltage gain characteristics are used in new energy power generation and Network processes play an integral role. Due to the influence of parasitic parameters of the conventional BOOST converter, its duty cycle cannot be too high, so the voltage gain capability of the BOOST converter is low, the voltage stress of the switch tube is large, and the power loss is serious. Therefore, the BOOST converter is in In the case of high efficiency, it is impossible to provide a high enough voltage gain ratio to increase the voltage to meet the needs of...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCH02M3/155
Inventor 李晖梅成林安然然刘军
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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