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Loop design method for double-closed-loop BUCK converter based on frequency domain analysis

A technology of frequency domain analysis and design method, applied in CAD circuit design, output power conversion device, conversion of DC power input to DC power output, etc.

Pending Publication Date: 2020-07-10
XI'AN PETROLEUM UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

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  • Loop design method for double-closed-loop BUCK converter based on frequency domain analysis
  • Loop design method for double-closed-loop BUCK converter based on frequency domain analysis
  • Loop design method for double-closed-loop BUCK converter based on frequency domain analysis

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Embodiment Construction

[0100] The following is a detailed description of the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

[0101] The embodiment of the present invention provides a loop design method of a double-closed-loop BUCK converter based on frequency domain analysis. The method takes the average current mode BUCK converter as a model, and deduces the transfer function of the system through system analysis. Then, the frequency domain analysis is carried out, and the appropriate current loop compensation and voltage loop compensation are selected respectively, and an average current type double closed-l...

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Abstract

The invention provides a loop design method for a double-closed-loop BUCK converter based on frequency domain analysis, and the method comprises the steps: taking an average current mode BUCK converter as a model, and carrying out the system analysis of the model; deducing the transfer function of the system through a model analysis result, and performing frequency domain analysis on the basis ofthe obtained transfer function; carrying out current loop compensation design according to a frequency domain analysis result; on the basis of current loop compensation, performing voltage loop compensation design; and according to the current loop compensation and the voltage loop compensation, obtaining the double-closed-loop BUCK converter added with the double-loop compensation. Meanwhile, theinvention provides the double-closed-loop BUCK converter based on frequency domain analysis, which is designed by adopting the loop design method. The average current type double-closed-loop BUCK converter is designed by selecting proper current loop compensation and voltage loop compensation, correctness and feasibility of the average current type double-closed-loop BUCK converter are verified through simulation, and research and development difficulty and research and development period of a switching power supply are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of loop design of a current-type control system (dual-loop control system), in particular to a double closed-loop BUCK converter based on frequency domain analysis and a loop design method thereof. Background technique [0002] DC-DC switching power supply has the advantages of high efficiency, high power density and high reliability, and has been widely used in communications, computers, industrial equipment, household appliances and other fields. The design of the switching power supply control loop has always been a difficult point for switching power supplies. In the past research and development process, time-domain design or simple debugging was used to test, which undoubtedly increased the difficulty of research and development and the development cycle. [0003] After searching, it is found that the time-domain design is to use PI or PID controller to realize the steady-state error and dynamic respon...

Claims

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Application Information

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IPC IPC(8): G06F30/39H02M3/335
CPCH02M3/33507Y02B70/10
Inventor 高鹏飞宋久旭
Owner XI'AN PETROLEUM UNIVERSITY
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