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A fuzzy pi control method for boost circuit simulation load unit

A load unit and circuit simulation technology, applied in the field of fuzzy PI control, can solve problems such as inability to adapt to load simulation conditions, achieve good dynamic response speed and static error requirements, protect the circuit system, and achieve fast dynamic response.

Active Publication Date: 2019-10-18
DONGGUAN LARGE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PI parameters obtained by the traditional PI tuning method are fixed values, which cannot adapt to complex load simulation conditions

Method used

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  • A fuzzy pi control method for boost circuit simulation load unit
  • A fuzzy pi control method for boost circuit simulation load unit
  • A fuzzy pi control method for boost circuit simulation load unit

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Embodiment Construction

[0029] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] A fuzzy PI control method for a boost circuit simulation load unit provided in this embodiment includes the following steps:

[0031] a. The circuit load simulation unit of the system adopts three modes: constant power, constant resistance and constant current;

[0032] b. Set the average value I of the input current IN_Ref Be the control variables of the three modes in step a;

[0033] c. The control module of the system obtains the system input current I through AD sampling and calculation IN and the average value of the input current I IN_Ref The exact value of the error e bet...

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Abstract

The present invention relates to the technical field of energy-feedback DC electronic load control, in particular to a fuzzy PI control method for a boost circuit analog load unit, selecting the control variable for normalization, and selecting the same control variable, i.e. the average value of the input current I IN_Ref , to control a variety of simulated load modes. Compared with the use of multiple control variables, a single control variable control not only makes the dynamic response of the system faster, but also realizes cycle-by-cycle current peak limit; in addition, a feedback control loop is used and fuzzy PI control is designed In the nonlinear boost circuit, the input current is tracked more accurately to achieve better dynamic response speed and static error requirements, while reducing current overshoot and protecting the circuit system.

Description

technical field [0001] The invention relates to the technical field of energy-feedback DC electronic load control, in particular to a fuzzy PI control method for a boost circuit simulation load unit. Background technique [0002] Based on the analog load control of the boost circuit, under different constant mode controls, the corresponding control variable reference value can be converted into the duty cycle of the corresponding boost circuit driving PWM waveform through calculation, that is, the control variable is set Reference. However, in various simulated load modes, such as constant power mode, constant resistance mode and constant current mode, different control objects make the control mode switching and feedback closed-loop design procedures cumbersome. Therefore, different control variables of different modes are controlled It is very important and efficient to transform it into the same variable control under multiple modes. [0003] However, the relationship b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
CPCH02M3/156H02M3/1566
Inventor 薛家祥朱亮华林方略林壮彬曾敏晋刚
Owner DONGGUAN LARGE ELECTRONICS CO LTD