电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2013年
6期
104-108
,共5页
高频逆变%推挽正激%小信号分析%SG3525
高頻逆變%推輓正激%小信號分析%SG3525
고빈역변%추만정격%소신호분석%SG3525
high frequency inverter%push-pull forward%small signal analysis%SG3525
本文给出了可用于隔离型逆变器前级DC/DC环节的方案—推挽正激变换器,通过研究隔离式DC/DC变换器的基本原理,在低频、小信号、小纹波条件下,利用状态空间平均法建立小信号模型。然后采用MATLAB软件进行辅助分析,设计了补偿电路,在此基础上搭建了推挽正激变换器的电压型闭环控制系统。最后进行了仿真和实验验证,实验结果表明所设计系统(样机)具有良好的动态性能和稳定性,进而验证了数学模型的正确性,采用控制策略的合理性以及设计方案的可行性。
本文給齣瞭可用于隔離型逆變器前級DC/DC環節的方案—推輓正激變換器,通過研究隔離式DC/DC變換器的基本原理,在低頻、小信號、小紋波條件下,利用狀態空間平均法建立小信號模型。然後採用MATLAB軟件進行輔助分析,設計瞭補償電路,在此基礎上搭建瞭推輓正激變換器的電壓型閉環控製繫統。最後進行瞭倣真和實驗驗證,實驗結果錶明所設計繫統(樣機)具有良好的動態性能和穩定性,進而驗證瞭數學模型的正確性,採用控製策略的閤理性以及設計方案的可行性。
본문급출료가용우격리형역변기전급DC/DC배절적방안—추만정격변환기,통과연구격리식DC/DC변환기적기본원리,재저빈、소신호、소문파조건하,이용상태공간평균법건립소신호모형。연후채용MATLAB연건진행보조분석,설계료보상전로,재차기출상탑건료추만정격변환기적전압형폐배공제계통。최후진행료방진화실험험증,실험결과표명소설계계통(양궤)구유량호적동태성능화은정성,진이험증료수학모형적정학성,채용공제책략적합이성이급설계방안적가행성。
This paper presents a push-pull forward converter, which can be used for the pre-isolated inverter and has some superiority in low voltage and high current situation. According to the principle of isolated DC/DC converter, small signal math model of PPF converter is established by using state-space averaging method under the assumption conditions of low-frequency, small signal and small ripple wave. Then the MATLAB software is used to carry through the assistant analysis, and design the control parameters and automatic closed control system based on the theoretical analysis. Finally, the simulation and experimental results show that the system(prototype) has perfect dynamic and static character, which verifies the validity of the mathematical model and the feasibility of the control strategy.