CN113938022A - 一种高频llc谐振直流变换器 - Google Patents

一种高频llc谐振直流变换器 Download PDF

Info

Publication number
CN113938022A
CN113938022A CN202111332596.1A CN202111332596A CN113938022A CN 113938022 A CN113938022 A CN 113938022A CN 202111332596 A CN202111332596 A CN 202111332596A CN 113938022 A CN113938022 A CN 113938022A
Authority
CN
China
Prior art keywords
converter
resonance
full
llc resonant
transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111332596.1A
Other languages
English (en)
Inventor
王秀茹
代鹏
邱冬
韩少华
庞吉年
周福举
房雪涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Jiangsu Electric Power Co ltd Suqian Power Supply Branch
Original Assignee
State Grid Jiangsu Electric Power Co ltd Suqian Power Supply Branch
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Jiangsu Electric Power Co ltd Suqian Power Supply Branch filed Critical State Grid Jiangsu Electric Power Co ltd Suqian Power Supply Branch
Priority to CN202111332596.1A priority Critical patent/CN113938022A/zh
Publication of CN113938022A publication Critical patent/CN113938022A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本发明公开了一种高频LLC谐振直流变换器，其特征在于：包括全桥电路结构及基本谐振电路结构，所述的全桥电路包括MOS管Q1、Q2、Q3、Q4、体二极管DQ1、DQ2、DQ3、DQ4及寄生电容Coss1、Coss2、Coss3、Coss4，所述的MOS管Q1、Q2、Q3、Q4共同构成了全桥电路的四个桥臂，所述的体二极管及寄生电容分别设置在四个MOS管上；所述的基本谐振电路包括谐振电容Cr、谐振电感Lr及变压器的励磁电感Lm，所述的谐振电感Lr和谐振电容Cr与负载串联，变压器励磁电感Lm与负载相互并联。本发明所提出的ADRC策略被嵌入在电压外环控制器中，实现了控制优化，在LLC谐振直流变换器受到扰动影响时得到最小的波动幅值和最短的暂态过程。

Description

一种高频LLC谐振直流变换器
技术领域
本发明涉及一种应用自抗扰控制技术的20kW高频LLC谐振直流变换器，属于新能源发电与微电网领域的一项发明技术。
背景技术
近年来，伴随着市场对变换器的需求的不断提升，提高开关管频率成为了减小无源元件体积的主要方法。但是提高开关频率往往会使得变换器中开关管的开关损耗提高。因此必须使用软开关技术来降低开关管的开通和关断损耗进而提高变换器效率。LLC谐振直流变换器的电路具有拓扑简单，电磁干扰小，输出功率等级范围宽的优点。该电路可以在较宽的输入电压变化范围内以及较大负载电压波动范围内调整输出电压。同时该谐振电路可以实现原边开关管的零电压开通，以及副边整流管的零电压关断，可以降低变换器的开关损耗，满足变换器对于效率、体积、频率的发展要求。对于提高开关电源的效率和功率密度，有着重要意义。但是LLC谐振直流变换器会因为电路的扰动而在输出侧产生电压的波动，给正常使用带来困难。
发明内容
本发明的目的在于提供一种高频LLC谐振直流变换器，其具有一定的自抗扰能力，可以有效的保证输出侧电压的稳定。
本发明采用如下技术手段实现：一种高频LLC谐振直流变换器，包括全桥电路结构及基本谐振电路结构，所述的全桥电路包括MOS管Q1、Q2、Q3、Q4、体二极管DQ1、DQ2、 DQ3、DQ4及寄生电容Coss1、Coss2、Coss3、Coss4，所述的MOS管Q1、Q2、Q3、Q4共同构成了全桥电路的四个桥臂，所述的体二极管及寄生电容分别设置在四个MOS管上；
所述的基本谐振电路包括谐振电容Cr、谐振电感Lr及变压器的励磁电感Lm，所述的谐振电感Lr和谐振电容Cr与负载串联，变压器励磁电感Lm与负载相互并联。
所述的变压器的原副边的匝数比为n:1。
所述的变压器副边侧绕线采用带中心抽头的结构，副边为由整流二极管D1、D2组成的半桥全波整流网络，整流网络连接输出滤波电路，输出滤波电路由电容Co充当，最后与负载RL相接。
在外环设置自抗扰控制器，所述的自抗扰控制器包括跟踪微分器、扩展状态观测器和非线性状态误差反馈控制律，跟踪微分器用于安排过渡过程，给出合理的控制信号，解决了响应速度与超调之间的矛盾；扩张状态观测器用来解决模型未知部分和外部未知扰动综合对控制对象的影响，然后给出信号补偿这些扰动，将控制对象变为普通的积分串联型控制对象；非线性误差反馈控制律给出被控对象的控制策略。
本发明所提出的ADRC策略被嵌入在电压外环控制器中，实现了控制优化，在LLC谐振直流变换器受到扰动影响时得到最小的波动幅值和最短的暂态过程。
附图说明
图1为全桥LLC型谐振DC/DC变换器拓扑示意图；
图2为LLC谐振变换器设计流程图；
图3为传统二阶线性自抗扰控制器示意图。
具体实施方式
下面结合说明书附图对本发明进行进一步详述：
本发明涉及一种高频LLC谐振直流变换器，包括全桥电路结构及基本谐振电路结构，所述的全桥电路包括MOS管Q1、Q2、Q3、Q4、体二极管DQ1、DQ2、DQ3、DQ4及寄生电容Coss1、Coss2、Coss3、Coss4，所述的MOS管Q1、Q2、Q3、Q4共同构成了全桥电路的四个桥臂，所述的体二极管及寄生电容分别设置在四个MOS管上；
所述的基本谐振电路包括谐振电容Cr、谐振电感Lr及变压器的励磁电感Lm，所述的谐振电感Lr和谐振电容Cr与负载串联，变压器励磁电感Lm与负载相互并联。
所述的变压器的原副边的匝数比为2:1。
所述的变压器副边侧绕线采用带中心抽头的结构，副边为由整流二极管D1、D2组成的半桥全波整流网络，整流网络连接输出滤波电路，输出滤波电路由电容Co充当，最后与负载RL相接。
本发明在外环设置自抗扰控制器，所述的自抗扰控制器包括跟踪微分器、扩展状态观测器和非线性状态误差反馈控制律，跟踪微分器用于安排过渡过程，给出合理的控制信号，解决了响应速度与超调之间的矛盾；扩张状态观测器用来解决模型未知部分和外部未知扰动综合对控制对象的影响，然后给出信号补偿这些扰动，将控制对象变为普通的积分串联型控制对象；非线性误差反馈控制律给出被控对象的控制策略。
以图3所示的传统二阶线性自抗扰控制器为例，r为母线电压参考输入；y为输出；b1为控制增益；z1为y的观测值；z2为
Figure RE-GDA0003413182720000021
的观测值；z3为总扰动的观测值；u为控制量。
n阶系统用微分方程表示为：
Figure RE-GDA0003413182720000031
其中：u和y为被控对象的输入和输出；w代表未知外扰；f为总扰动其包括系统模型未知部分、元件参数飘动部分、外扰w和估计误差部分的等不确定项；b为控制器增益。
令
Figure RE-GDA0003413182720000032
以及x＝[x1 x2 … x(n+1)]T，假设f可导，
Figure RE-GDA0003413182720000033
其中：
Figure RE-GDA0003413182720000034
对应的连续线性扩张状态观测器(LESO)为
Figure RE-GDA0003413182720000035
其中：z→x，z和
Figure RE-GDA0003413182720000036
分别为状态变量矩阵和其导数矩阵。L为需要设计的状态观测器增益矩阵L＝[l1 l2 … ln ln+1]T。由于扰动项
Figure RE-GDA0003413182720000037
未知且通过校正项可以估计出来，因而式(3.3)中略去
Figure RE-GDA0003413182720000038
重写观测器方程，
Figure RE-GDA0003413182720000039
其中：uc＝[u y]T是组合输入，yc是输出。
引入观测器带宽ω0对L参数进行整定；式中l1,l2,…,ln,ln+1为矩阵L的参数，可取参数化结果，使观测器特征多项式为：
sn+1+l1sn+…+lns+ln+1＝(s+ω0)n+1 (5)
当系统渐进稳定时，观测器的状态变量zi(i＝1,2,3,…,n+1)将追踪系统的状态变量x1，即：
Figure RE-GDA00034131827200000310
本发明在外环引入了ADRC，根据扰动观测通道z2对总扰动的观测和补偿，实现了基于扰动消除扰动的控制策略，此外基于自抗扰控制扰动观测通道z3对耦合项的估计，限制了输出侧的电压波动，有效地优化了电能质量。根据电压、电流采样和锁相环获得电压、电流、直流母线电压的值，送入DSP芯片(TS28379D)中进行运算，然后通过内环的PI 控制器计算出占空比，根据占空比得到触发脉冲实现最终的控制。

Claims (4)

1.一种高频LLC谐振直流变换器，其特征在于：包括全桥电路结构及基本谐振电路结构，所述的全桥电路包括MOS管Q1、Q2、Q3、Q4、体二极管DQ1、DQ2、DQ3、DQ4及寄生电容Coss1、Coss2、Coss3、Coss4，所述的MOS管Q1、Q2、Q3、Q4共同构成了全桥电路的四个桥臂，所述的体二极管及寄生电容分别设置在四个MOS管上；
所述的基本谐振电路包括谐振电容Cr、谐振电感Lr及变压器的励磁电感Lm，所述的谐振电感Lr和谐振电容Cr与负载串联，变压器励磁电感Lm与负载相互并联。
2.根据权利要求1所述的高频LLC谐振直流变换器，其特征在于：所述的变压器的原副边的匝数比为n:1。
3.根据权利要求2所述的高频LLC谐振直流变换器，其特征在于：所述的变压器副边侧绕线采用带中心抽头的结构，副边为由整流二极管D1、D2组成的半桥全波整流网络，整流网络连接输出滤波电路，输出滤波电路由电容Co充当，最后与负载RL相接。
4.根据权利要求1所述的高频LLC谐振直流变换器，其特征在于：在外环设置自抗扰控制器，所述的自抗扰控制器包括跟踪微分器、扩展状态观测器和非线性状态误差反馈控制律，跟踪微分器用于安排过渡过程，给出合理的控制信号，解决了响应速度与超调之间的矛盾；扩张状态观测器用来解决模型未知部分和外部未知扰动综合对控制对象的影响，然后给出信号补偿这些扰动，将控制对象变为普通的积分串联型控制对象；非线性误差反馈控制律给出被控对象的控制策略。
CN202111332596.1A 2021-11-11 2021-11-11 一种高频llc谐振直流变换器 Pending CN113938022A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111332596.1A CN113938022A (zh) 2021-11-11 2021-11-11 一种高频llc谐振直流变换器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111332596.1A CN113938022A (zh) 2021-11-11 2021-11-11 一种高频llc谐振直流变换器

Publications (1)

Publication Number Publication Date
CN113938022A true CN113938022A (zh) 2022-01-14

Family

ID=79286205

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111332596.1A Pending CN113938022A (zh) 2021-11-11 2021-11-11 一种高频llc谐振直流变换器

Country Status (1)

Country Link
CN (1) CN113938022A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116707311A (zh) * 2023-05-12 2023-09-05 东莞光亚智能科技有限公司 一种llc谐振变换器及其控制系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103606954A (zh) * 2013-11-27 2014-02-26 上海电力学院 一种新型光伏并网发电控制方法
CN108429286A (zh) * 2018-04-02 2018-08-21 武汉理工大学 一种基于自抗扰控制的并网电流调节器
CN108919643A (zh) * 2018-06-28 2018-11-30 华北电力大学 一种用于线性自抗扰控制器参数的鲁棒整定方法
CN110011296A (zh) * 2019-03-12 2019-07-12 浙江工业大学 一种基于自抗扰控制技术的直流微电网分布式下垂控制方法
CN209963957U (zh) * 2019-05-16 2020-01-17 中国地质大学（武汉） 一种定频谐振式直流变换装置
CN111416524A (zh) * 2020-04-27 2020-07-14 山东大学 谐振型dc-dc变换器高抗扰快响应控制系统及方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103606954A (zh) * 2013-11-27 2014-02-26 上海电力学院 一种新型光伏并网发电控制方法
CN108429286A (zh) * 2018-04-02 2018-08-21 武汉理工大学 一种基于自抗扰控制的并网电流调节器
CN108919643A (zh) * 2018-06-28 2018-11-30 华北电力大学 一种用于线性自抗扰控制器参数的鲁棒整定方法
CN110011296A (zh) * 2019-03-12 2019-07-12 浙江工业大学 一种基于自抗扰控制技术的直流微电网分布式下垂控制方法
CN209963957U (zh) * 2019-05-16 2020-01-17 中国地质大学（武汉） 一种定频谐振式直流变换装置
CN111416524A (zh) * 2020-04-27 2020-07-14 山东大学 谐振型dc-dc变换器高抗扰快响应控制系统及方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116707311A (zh) * 2023-05-12 2023-09-05 东莞光亚智能科技有限公司 一种llc谐振变换器及其控制系统

Similar Documents

Publication Publication Date Title
CN111525807B (zh) 基于谐波优化的高阶lclcl直流变换器及参数设计方法
CN109889047B (zh) 一种适用于宽输入宽输出电压范围的两级式dc-dc变换器
Huang et al. Comprehensive coordinated frequency control of symmetrical CLLC-DC transformer in hybrid AC/DC microgrids
CN113659684A (zh) 副边cl/s恒流恒压ipt充电系统及其参数设计方法
WO2022021949A1 (zh) 宽功率范围内实现zvs的无线充电系统调控方法及系统
CN216134292U (zh) 副边cl/s恒流恒压ipt充电系统
CN111490698B (zh) 一种相位关联zvt磁化电流最小化的辅助谐振换流极逆变器
CN111525809B (zh) 一种输出电压可调的高频混合型直流变换器
CN115622413B (zh) 一种clclc型谐振变换器及调制方法
CN111740510B (zh) 基于移相调节控制的无线充电方法及系统
CN113422441A (zh) 一种电动汽车高效率稳压无线充电系统及其设计方法
Gu et al. Regulated series hybrid converter with DC transformer (DCX) for step-up power conversion
Zhou et al. Input voltage feed-forward control strategy for cascaded DC/DC converters with wide input voltage range
CN113938022A (zh) 一种高频llc谐振直流变换器
CN113676045A (zh) 基于耦合电感的交错同步buck变换器的数字软开关控制方法
CN114039492A (zh) 一种不对称半桥反激变换器改进型峰值电流控制方法
CN112953245A (zh) 双有源桥式变换器全负载范围软开关控制方法
Sharma et al. An Approach to eliminate the Non-Minimum Phase issue in High Gain Converters
CN116613993A (zh) 一种谐振变换器的控制方法、电路及谐振变换器
CN217693114U (zh) 一种基于磁控制的单级整流电路
CN114094863A (zh) 一种逆变电源及其开环直流升压和闭环交流输出控制方法
Zhang et al. Hybrid structure for an input-parallel output-serial DC-DC combined converter with high efficiency and high power density
Behzadpour et al. Applying a novel soft switching technique to three-phase active power filter
Wen et al. The Hybrid Control Strategy for The Wide Input of The LLC Converter
CN113630014B (zh) 一种双有源桥钳位变换器及其控制方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20220114