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Specific subharmonic suppression pulse width modulation method and device based on Levenberg-Marquardt method

A pulse width modulation and sub-harmonic technology, which is applied in the direction of pulse duration/width modulation, etc., can solve the problems of no solution in the device and inability to solve engineering problems, and achieve the effect of simplifying the control process

Pending Publication Date: 2022-02-18
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Problems solved by technology

[0005] In view of this, the purpose of one or more embodiments of this specification is to propose a specific harmonic suppression pulse width modulation method and device based on the Levenberg-Marquardt method, so as to solve the problem of unnecessary solution, so it cannot solve practical engineering problems

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  • Specific subharmonic suppression pulse width modulation method and device based on Levenberg-Marquardt method
  • Specific subharmonic suppression pulse width modulation method and device based on Levenberg-Marquardt method
  • Specific subharmonic suppression pulse width modulation method and device based on Levenberg-Marquardt method

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[0082] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0083] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present specification shall have ordinary meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in one or more embodiments of the present specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "con...

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Abstract

One or more embodiments of the invention provide a specific subharmonic suppression pulse width modulation method and device based on a Levenberg-Marquardt method. The problem of specific subharmonic suppression pulse width modulation of a converter is converted into the problem of solving a transcendental equation set formed by representing each subharmonic through a switching angle; and therefore, carrier waves do not need to be generated and do not need to be compared with modulated waves, and a control process is simplified. Meanwhile, the Levenberg-Marquardt method can be utilized to overcome the problem of no solution possibly existing in the existing algorithm, and it is ensured that the switching angle adjustment direction can be stably obtained according to the pulse width modulation problem.

Description

technical field [0001] One or more embodiments of this specification relate to the field of power electronics science and technology, and in particular to a specific sub-harmonic suppression pulse width modulation method and device based on the Levenberg-Marquardt method. Background technique [0002] With the advancement of power electronics technology and the cross-border integration of interdisciplinary subjects, the problem of converter harmonic suppression has gradually shifted from traditional solutions such as improving converter topology and installing power quality compensators to improving converter harmonic suppression algorithms. development shift. [0003] Converter Harmonic Suppression Traditional commonly used carrier comparison modulation methods, such as SPWM (Sinusoidal Pulse width modulation, sinusoidal pulse width modulation) algorithm, need to generate a carrier and compare the carrier with the modulating wave. The real-time control of the converter is d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K7/08
CPCH03K7/08
Inventor 曹佳胡家喜何亚屏成正林陈艺峰唐建宇徐万良陶洪亮刘永丽
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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