A control method for dcm single-bridge integrated split-source boost inverter

A control method and inverter technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve problems such as not applicable to independent inverter applications, and improve the quality of output waveforms , to avoid the effect of overmodulation

Active Publication Date: 2021-08-13
NANTONG UNIVERSITY
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Problems solved by technology

This control method avoids the problem of over-modulation of the output waveform at light load, but it needs to use the output power as the control degree of freedom, so it is not suitable for the application of independent inverter (the load power is constant in the output voltage regulation mode)

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  • A control method for dcm single-bridge integrated split-source boost inverter
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  • A control method for dcm single-bridge integrated split-source boost inverter

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The embodiment of the present application discloses a method such as figure 1 (a) The control method of the DCM single-leg integrated split-source boost inverter with the structure shown, the DCM single-bridge integrated split-source boost inverter includes a DC power supply E, an input inductor L in , anti-reverse diode D, first and second switching tubes S 1 , S 2 The boost bridge arm constituted, the third and fourth switching tubes...

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Abstract

The invention relates to a control method of a DCM single bridge arm integrated split source boost inverter, the control method is applied to an independent inverter occasion under the output voltage stabilization mode, including: obtaining the DC bus voltage and comparing it with the DC bus voltage reference Make a comparison, and realize the DC side boost control through the DC bus voltage PI controller; obtain the output voltage, compare the output voltage with the output AC reference, and realize the sinusoidalization and amplitude control of the output waveform through the output voltage PI controller. Through this method, the DCM single-bridge integrated split source boost inverter can be applied to the independent inverter occasion in the output voltage stabilization mode, and can effectively avoid the output waveform over-modulation phenomenon during light-load operation, and improve the output waveform quality. In addition, an input inductance design method is provided, which can ensure that the system always works in the inductive current discontinuous mode in the entire operating range, so that the provided control method can be implemented smoothly.

Description

technical field [0001] The present invention relates to the field of electrical technology, in particular to a control method for a DCM single-bridge integrated split source boost inverter, and in particular to a DCM single-bridge applied to an independent inverter in an output voltage stabilization mode A control method for an integrated split-source boost inverter. Background technique [0002] The two-stage single-phase boost inverter is widely used in occasions where the input voltage is low and has a large variation range. Its control is relatively simple, but the number of power devices is large, the cost is high, and the overall efficiency is difficult to further improve. In recent years, some scholars have proposed a single-arm integrated split-source inverter, which realizes the front-stage DC-DC boost converter (such as Boost, Buck- Boost, etc.) and a bridge arm of the rear-stage single-phase voltage source inverter, which not only realizes the boost inverter, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387H02M7/5395
CPCH02M7/53871H02M7/5395
Inventor 秦岭沈家鹏段冰莹周磊许兴高娟田民马宇昂钱天泓
Owner NANTONG UNIVERSITY
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