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Boosting half-bridge inverter and control circuit and method thereof

A half-bridge inverter and capacitor technology, which is applied to electrical components, AC power input conversion to DC power output, output power conversion devices, etc., can solve problems such as low boost ratio

Active Publication Date: 2019-08-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical problem of low boost ratio in the boost inverter in the prior art, the present invention provides a boost half-bridge inverter and its control circuit and method

Method used

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  • Boosting half-bridge inverter and control circuit and method thereof
  • Boosting half-bridge inverter and control circuit and method thereof
  • Boosting half-bridge inverter and control circuit and method thereof

Examples

Experimental program
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Embodiment 1

[0100] Such as figure 1 It is a schematic diagram of the circuit topology structure of the present invention. This embodiment proposes a boost half-bridge inverter, including a power switch tube S 1 , S 2 , Diode D 1 、D 2 、D 3 , inductance L 1 and capacitance C 1 、C 2 ;in,

[0101] Inductance L 1 One end is connected to one end of the input side, the inductance L 1 The other end is connected to the diode D 1 connected to the anode;

[0102] Diode D 1 The cathodes are respectively connected to the power switch tube S 1 Terminal A, diode D 2 Cathode and Capacitor C 1 one end;

[0103] Power switch tube S 1 C terminal and diode D 3 The cathode and the other end of the input side are connected to node a;

[0104] Diode D 2 Anode and power switch tube S 2 Terminal A of is connected to node b;

[0105] Capacitance C 1 The other end is connected to the capacitor C 2 One end of is connected to node c;

[0106] Diode D 3 The anodes are respectively connected to...

Embodiment 2

[0110] In order to further filter out harmonics or clutter on the output side, this embodiment is based on the basis of Embodiment 1, such as figure 2 for figure 1 A structural schematic diagram of a preferred mode, the output side is connected to the input side of the filter, and the output side of the filter is connected to the load or the power grid. There are various choices of filters, and three are listed here to explain clearly the content of the technical solution of the present invention.

[0111] In the first case, if image 3 for figure 2 A schematic diagram of the circuit topology of the filter I used in the filter selection, the filter is a filter I, and the filter I includes a filter inductor L 2 , L 3 and filter capacitor C O , filter inductance L 2 One end is connected to node a, and the filter inductor L 2 the other end and the filter inductor L 3 One end and filter capacitor C O Connected at one end, the filter capacitor C O The other end is conne...

Embodiment 3

[0115] This embodiment relates to a control circuit of a step-up half-bridge inverter, which is applicable to a step-up half-bridge inverter in each technical solution described in Embodiments 1 and 2. Such as Figure 26 As shown, the output side voltage uo of the filter is used as the feedback voltage, and the given voltage U ref The error value is obtained by comparison, and the error value is passed through the regulator (the type of regulator can be selected according to the needs, and the attached Figure 26 The example given in is the PID regulator, which can be selected in actual use, PI, PD, etc. are not limited by the examples listed in this embodiment and the accompanying drawings) After adjustment, the triangular wave u tri Comparing to generate a pulse signal, input to the power switch tube S 1 and S 2 the B side.

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Abstract

The invention discloses a boosting half-bridge inverter and a control circuit and method thereof, and aims at solving the problems that a boosting inverter in the prior art needs relatively more switching devices and is complex in control. and belongs to the technical field of power electronic converters. One end of an inductor L1 of the inverter is connected with one end of an input power supply,and the other end of the inductor L1 is connected with the anode of a diode D1; the cathode of the diode D1 is connected with the end A of a power switch tube S1, the cathode of a diode D2 and one end of a capacitor C1; the anode of the diode D2 is connected with the end A of a power switch tube S2; the other end of the capacitor C1 is connected with one end of a capacitor C2; the anode of a diode D3 is connected with the end C of the power switch tube S2 and the other end of the capacitor C2; and the cathode of the diode D3 is connected with the end C of the power switch tube S1 and the other end of the input power supply. The inverter in the invention is high in integrated level, simple in structure, easy to control and higher in the boosting transformation ratio.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a step-up half-bridge inverter and its control circuit and method. Background technique [0002] With the rapid development of new energy power generation systems, the performance requirements of inverters are also getting higher and higher. Grid-connected inverter is the main interface device between grid and photovoltaic array, and its performance determines the performance of the entire photovoltaic power generation system. The pursuit of high reliability, high power density, and high efficiency is the development trend of inverters. [0003] The traditional bridge inverter has the characteristics of simple topology and low cost, so it is widely used. However, there is a shoot-through problem between the upper and lower switching tubes of the same bridge arm of the inverter, which reduces the reliability of the system. To prevent the shoot-through, it is ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M1/12H02M7/539
CPCH02M1/12H02M7/5387H02M7/539H02M1/123H02M1/126H02M1/0085
Inventor 胡雪峰俞志祥程宇刘行张梦戴冠军
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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