Fractional order chaos radiation suppression method and system, computer equipment and storage medium

A chaotic system and fractional order technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of suppression research to be expanded, achieve the effect of suppressing conducted electromagnetic interference, meeting high power density, and reducing the use of magnetic components

Active Publication Date: 2022-02-22
GUANGZHOU UNIVERSITY
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Problems solved by technology

The existing EMI active suppression technology based on chaotic PWM focuses on the research of integer-order chaotic systems, and the research on the suppression of EMI by fractional-order chaos needs to be expanded.
In addition, there are few studies on the radiation suppression of power electronic converters by variable switching frequency PWM

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  • Fractional order chaos radiation suppression method and system, computer equipment and storage medium
  • Fractional order chaos radiation suppression method and system, computer equipment and storage medium
  • Fractional order chaos radiation suppression method and system, computer equipment and storage medium

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Embodiment Construction

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0055] see figure 1 , a fractional-order chaotic PWM method for suppressing near-field radiation of a switching power supply proposed in the first embodiment of the present invention, which includes steps S10 to S40:

[0056] Step S10, obtaining the expression of the fractional order chaotic system, calculating the order corresponding to the...

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Abstract

The invention relates to the technical field of electromagnetic interference suppression, and discloses a fractional order chaos radiation suppression method and system, computer equipment and a storage medium. The method comprises the following steps: acquiring a fractional order chaotic system expression, calculating a corresponding order when a Lyapunov index of the fractional order chaotic system is maximum, and defining the order as an optimal order; according to the optimal order, obtaining a fractional order chaotic attractor expression, and discretizing the expression to obtain a time domain sequence of the chaotic system; normalizing the time domain sequence to obtain a triangular carrier of which the frequency changes along with the fractional order chaotic signal; and comparing the triangular carrier with a feedback voltage signal of the switching power supply to obtain a fractional order chaos PWM, and returning the fractional order chaos PWM to a control end of the switching power supply. According to the invention, the electromagnetic interference suppression capability is good, the conduction electromagnetic interference can be suppressed, and the near-field radiation of the switching power supply can be better suppressed.

Description

technical field [0001] The invention relates to the technical field of electromagnetic interference suppression, in particular to a method, a system, a computer device and a storage medium for suppressing near-field radiation of a switching power supply by fractional-order chaotic PWM. Background technique [0002] At present, the flyback converter is the most widely used switching converter topology in the small and medium power switching power supply market. With the development of high power density of power supply products, the operating frequency of switching power supply products is also increasing, and the resulting electromagnetic interference problem has attracted more and more attention. In the research of electromagnetic interference suppression technology, traditional EMI suppression methods such as filtering and shielding introduce large magnetic components, which seriously restricts the high power density of power supply products. In recent years, the EMI acti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44
CPCH02M1/44Y02B70/10
Inventor 杨汝吴键澄余连得揭海刘佐濂
Owner GUANGZHOU UNIVERSITY
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