一种提高四开关Buck-Boost电路环路响应能力的方法

doi:10.16628/j.cnki.2095-8188.2021.01.006

电器与能效管理技术 ›› 2021, Vol. 0 ›› Issue (1): 36-44.doi: 10.16628/j.cnki.2095-8188.2021.01.006

一种提高四开关Buck-Boost电路环路响应能力的方法

蔡以力, 徐玉珍, 郑清良

福州大学电气工程与自动化学院, 福建福州 350108

收稿日期:2020-11-14 出版日期:2021-01-30 发布日期:2021-02-05
作者简介:蔡以力 (1995—),男,硕士研究生,研究方向为电力电子变流技术。|徐玉珍(1975—),女,副教授,研究方向为电力电子变流技术等。|郑清良(1988—),男,硕士研究生,研究方向为电力电子变流技术。
基金资助:
* 校科研启动基金(2019-JJFDKY-24)

Method for Improving Loop Response Capability of Four Switch Buck-Boost Circuit

CAI Yili, XU Yuzhen, ZHENG Qingliang

College of Electrical Engineering and Automation,Fuzhou University, Fuzhou 350108, China

Received:2020-11-14 Online:2021-01-30 Published:2021-02-05

摘要/Abstract

摘要：

常见的多模式控制的四开关Buck-Boost变换器,均以Boost模式下的零极点作为设计补偿网络的主要依据,却忽略了其他工作模式下的动态响应性能,只能使系统在输入电压范围内具有良好的稳定性和动态响应的性能。为改善系统整体的稳定性和动态响应速度,提出了一种新型模式切换补偿的控制策略。用能量守恒法和开关元件的平均建模法对变换器系统进行建模,根据小信号模型推导出各种模式的开环传递函数,并设计补偿切换电路。最后搭建仿真模型和实验电路进行研究,验证了所提补偿方式的可行性,提高了环路的响应能力。

关键词: 四开关Buck-Boost变换器, 动态响应, 模式切换, 稳定性, 补偿器

Abstract:

The common four switch Buck-Boost converter with multi-mode control operating mode switching control strategy is a single compensation method.The pole-zero point in Boost mode is used as the main basis for designing the compensation network,but the dynamic response performance in other operating modes is ignored.The method can only make the system have good stability and dynamic response performance within the input voltage range.In order to improve the overall stability and dynamic response speed of the system,a new mode switching compensation control strategy is proposed.The converter system is modeled by the energy conservation method and the average modeling method of switching elements.Open loop transfer functions of various modes are derived from the small signal model,and the compensation switching circuit is designed.Finally,simulation models and experimental circuits are built for research,which verify the feasibility of the proposed compensation method and improve the response ability of the loop.

Key words: four switch Buck-Boost converter, dynamic response, mode switching, stability, compensator

中图分类号:

TM46

蔡以力, 徐玉珍, 郑清良. 一种提高四开关Buck-Boost电路环路响应能力的方法[J]. 电器与能效管理技术, 2021, 0(1): 36-44.

CAI Yili, XU Yuzhen, ZHENG Qingliang. Method for Improving Loop Response Capability of Four Switch Buck-Boost Circuit[J]. LOW VOLTAGE APPARATUS, 2021, 0(1): 36-44.

图/表 11

图1

图2

图3

图4

图5

表1

峰值电流控制FSBB变换器的占空比函数的参数

工作模式		F_m	F_g	F_v
模式1	u_in<u_out	$f s M c + M 1 (1 - D 1)$	$D 12 + 2 D 1 + 2 D 2 2 L f s$	$(1 - D 2) 2 - 4 D 1 L f s$
	$u in =$ u_out	$f s M c + M 1 D 2 s$	$D 22 2 L f s$	$(1 - D 1) 2 2 L f s$
	u_in>u_out	$f s M c - M 1 (1 - D 1 - 2 D 2)$	$1.5 D 12 + D 1 L f s$ + $- D 2 + 2 D 1 D 2 L f s$	$2 D 1 (D 1 - 1 - D 2) L f s$ + $0.5 (1 - D 2) 2 L f s$
模式2		$f s M c + M 2 - M 1 (1 - D 1)$	$D 12 2 L f s$	$D 22 - 2 D 1 + 1 2 L f s$
模式3		$f s M c$	$D 12 2 L f s$	$1 - D 2 2 L f s$

表1

图6

图7

表2

图8

图9

参考文献 11

[1]	徐洪伟. 开关电源在通信系统中的应用[D]. 呼和浩特:内蒙古大学, 2015.
[2]	顾亦磊, 黄贵松, 章进法. 一种适用于模块并联的同步整流驱动电路[J]. 中国电机工程学报, 2005,25(5):74-78.
[3]	YAN X W, WANG Y, GE X F, et al. Dual-loop control with input voltage feedforward for dual-switch Buck-Boost converter[J]. Electric Power Automation Equipment, 2016,36(19):65-70.
[4]	ZAINURI M A A M, RADZI M A M, SOH A C, et al. Development of adaptive perturb and observe-fuzzy control maximum power point tracking for photovoltaic Boost DC-DC converter[J]. IET Renewable Power Generation, 2014,8(2):183-194. doi: 10.1049/iet-rpg.2012.0362
[5]	JONES D C, ERICKSON R W. A nonlinear state machine for dead zone avoidance and mitigation in a synchronous noninverting Buck-Boost converter[J]. IEEE Transactions on Power Electronics, 2013,28(1):467-480. doi: 10.1109/TPEL.2012.2198924
[6]	AGOSTINELLI M, PRIEWASSER R, MARSILI S, et al. Fixed-frequency pseudo sliding mode control for a Buck-Boost DC-DC converter in mobile applications:A comparison with a linear PID controller[C]// 2011 IEEE International Symposium on Circuits and Systems (ISCAS), 2011:1604-1607.
[7]	MARIETHOZ S, ALMER S, MORARI M. Optimal control of a two control input Buck-Boost converter[C]// Proceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference, 2009:6575-6581.
[8]	康家玉, 陈旭阳, 刘甲琛. 基于四开关Buck-Boost的三模式平滑切换控制策略[J]. 科学技术与工程, 2019,19(33):193-199.
[9]	姚川, 阮新波, 曹伟杰, 等. 双管Buck-Boost 变换器的输入电压前馈控制策略[J]. 中国电机工程学报, 2013,33(21):36-44.
[10]	任小永. 高效率高功率密度通信模块电源技术的研究[D].南京:南京航天航空大学. 2008.
[11]	张玮麟, 刘东立, 张耀昌. 非理想Buck变换器建模与控制研究[J]. 电器与能效管理技术, 2020(7):25-28.

参数	数值
输入电压范围U_in/V	4~20
输出电压U_out/V	5
额定功率P_o/W	15
电感L/μH	3.3
输出瓷片电容C/μF	47×3
开关频率f_s/ kHz	500
输出电容等效电阻R_c/mΩ	5
电感R_L/mΩ	27
电阻负载R/Ω	5/3
占空比d_{1_max}	0.8
占空比d_{2_min}	0.15

一种提高四开关Buck-Boost电路环路响应能力的方法

Method for Improving Loop Response Capability of Four Switch Buck-Boost Circuit

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 11

参考文献 11

相关文章 1

编辑推荐

Metrics

本文评价