Chaotic frequency modulation digital switch power control circuit based on FPGA

A digital switching power supply and frequency modulation technology, applied in electrical components, output power conversion devices, etc., can solve the problem of lack of economical and effective chaotic frequency modulation scheme, and achieve the effect of controllable modulation range and suppression of electromagnetic interference.

Active Publication Date: 2018-11-23
SHUNDE POLYTECHNIC
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  • Abstract
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  • Claims
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Problems solved by technology

At present, especially in the field of digital switching power supply control, there

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  • Chaotic frequency modulation digital switch power control circuit based on FPGA

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Embodiment Construction

[0010] The invention realizes the design scheme for the FPGA circuit, wherein the chaotic mapping function circuit and the PID duty cycle parameter calculation circuit can adopt common design schemes as circuit modules.

[0011] A chaotic frequency modulation digital switching power supply control circuit based on FPGA, comprising a PID duty cycle parameter calculation circuit 3, a chaotic sequence generation circuit 1, a chaotic signal processing circuit 2, and a digital pulse width modulation circuit 4; the PID duty cycle parameter The computing circuit is electrically connected to the digital pulse width modulation circuit; the chaotic sequence generation circuit is electrically connected to the chaotic signal processing circuit; the chaotic signal processing circuit is electrically connected to the digital pulse width modulation circuit; the digital pulse width modulation circuit Make an electrical connection to the circuit output signal.

[0012] The chaotic sequence gene...

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Abstract

The present invention discloses a chaotic frequency modulation digital switch power control circuit based on the FPGA. The circuit comprises a PID duty ratio parameter calculation circuit, a chaotic sequence generation circuit, a chaotic signal processing circuit and a digital pulse width modulation circuit; the PID duty ratio parameter calculation circuit is electrically connected the digital pulse width modulation circuit; the chaotic sequence generation circuit is electrically connected with the chaotic signal processing circuit; the chaotic signal processing circuit is electrically connected with the digital pulse width modulation circuit; and the digital pulse width modulation circuit is electrically connected with circuit output signals. The circuit can achieve chaotic modulation ofthe digital switch power switching frequency, is controllable in the modulation range, can inhibit the electromagnetic interference of the digital switch power source and can be used for the digital switch power control chip design.

Description

technical field [0001] The invention relates to the technical field of power electronic control, and more specifically relates to a chaotic frequency PWM modulation FPGA control circuit, which is suitable for electromagnetic interference suppression control of digital switching power supplies. Background technique [0002] Due to the unique programmability, portability, and multi-functional control characteristics of numerical control switching power supply, it is more and more popular in the market. However, because the input current and switching tube voltage of switching power supply are rich in electromagnetic interference noise The harmonic component of the switching frequency, the energy is concentrated at the switching frequency and its multiplier, forming serious electromagnetic interference. The application of chaotic frequency modulation technology can disperse the frequency of noise harmonics, reduce the amplitude of discrete harmonics, make the power spectrum a c...

Claims

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Application Information

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IPC IPC(8): H02M1/08H02M1/44
CPCH02M1/08H02M1/44H02M1/0012Y02B70/10
Inventor 牛俊英蔡泽凡王思宏伍世瑞
Owner SHUNDE POLYTECHNIC
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