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Method for reducing output voltage ripples of Boost power electronics inverter

An output voltage ripple, power electronics technology, applied in the field of power electronic converter switching control, can solve the problem of large output voltage ripple, and achieve the effect of reducing output voltage ripple and speeding up output voltage response speed

Inactive Publication Date: 2014-07-02
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for reducing the output voltage ripple of Boost power electronic converter switching control by using the feedback idea, so as to overcome the shortcomings of the existing control method to control the output voltage ripple

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  • Method for reducing output voltage ripples of Boost power electronics inverter
  • Method for reducing output voltage ripples of Boost power electronics inverter
  • Method for reducing output voltage ripples of Boost power electronics inverter

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Embodiment Construction

[0026] 1) Description of the controlled object

[0027] Boost converter circuit such as figure 1 As shown, the circuit is composed of an input power supply E, an inductor L, a diode D, a switch S, a capacitor C and a load R, where the inductor L and the equivalent first resistance r L In series, the diode D and the equivalent second resistor r d In series, the switch S and the equivalent third resistance r s In series, capacitor C and equivalent fourth resistor r c in series. According to the basic law of the circuit, the dynamic equation of the Boost converter can be obtained

[0028] X · = A k X + B k U - - - ( 1 )

[0029] where X=[x 1 x 2 ] T =[i L v C ] T , T represents vector transposition, i L is the inductor current value, v C i...

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Abstract

The invention provides a method for reducing the output voltage ripple of a Boost power electronic converter: first calculate the current reference value Iref, then calculate the reference voltage value Vref, then calculate the minimum value Rmin of the load resistance, and determine the ripple voltage vripple, and finally On the premise that the load resistance of the converter is greater than Rmin, the converter switch is controlled as follows: measure the output voltage vC, measure the inductor current iL, when vC is less than the reference voltage Vref and iL is less than or equal to zero, the control switch is closed; measure the inductor current iL, when iL is greater than When the reference current Iref, the control switch is turned off. The beneficial effect of the invention is that the output voltage response speed of the converter can be accelerated, and the output voltage ripple of the converter can be reduced.

Description

technical field [0001] The invention belongs to the field of electric energy conversion devices, and relates to a switching control method of a power electronic converter, which is used for reducing the output voltage ripple of the power electronic converter under switching control. Background technique [0002] Electric energy is the most important form of energy in modern society, and the power electronic converter realizes the conversion of electric energy and is the key device for the effective utilization of electric energy. A power electronic converter is a typical hybrid system with both discrete events of switching devices being turned on and off, and state variables that change continuously when the switch is in a specific state. A hybrid system is a unified dynamic system formed by the interaction of a continuous variable system and a discrete event dynamic system. It is possible for the circuit to be linear in each switching state, but the switching of the switch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14
Inventor 李洁郑婷任海鹏
Owner XIAN UNIV OF TECH