电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2014年
14期
110-115
,共6页
开关电源%功率因数%单片机%FPGA
開關電源%功率因數%單片機%FPGA
개관전원%공솔인수%단편궤%FPGA
switch power supply%power factor%single chip processor%FPGA
由于输入电流波形畸变，开关电源的输入电流中含有大量谐波成份，不仅功率因数低，而且会对电网造成污染。针对传统开关电源的不足，设计了一种基于单片机和FPGA控制的半智能型功率因数可调开关电源系统。所设计的功率因数校正电路中采用的同步整流技术解决了输入电压交越失真问题，实现了输入电压的无缝整流。此外，程控系统能对电路参数进行实时监测和显示，藉此实现了对电路功率因数的设定和电路的过流保护。测试结果表明，该开关电源系统的功率因数可调，效率在96%以上，稳定度较高。
由于輸入電流波形畸變，開關電源的輸入電流中含有大量諧波成份，不僅功率因數低，而且會對電網造成汙染。針對傳統開關電源的不足，設計瞭一種基于單片機和FPGA控製的半智能型功率因數可調開關電源繫統。所設計的功率因數校正電路中採用的同步整流技術解決瞭輸入電壓交越失真問題，實現瞭輸入電壓的無縫整流。此外，程控繫統能對電路參數進行實時鑑測和顯示，藉此實現瞭對電路功率因數的設定和電路的過流保護。測試結果錶明，該開關電源繫統的功率因數可調，效率在96%以上，穩定度較高。
유우수입전류파형기변，개관전원적수입전류중함유대량해파성빈，불부공솔인수저，이차회대전망조성오염。침대전통개관전원적불족，설계료일충기우단편궤화FPGA공제적반지능형공솔인수가조개관전원계통。소설계적공솔인수교정전로중채용적동보정류기술해결료수입전압교월실진문제，실현료수입전압적무봉정류。차외，정공계통능대전로삼수진행실시감측화현시，자차실현료대전로공솔인수적설정화전로적과류보호。측시결과표명，해개관전원계통적공솔인수가조，효솔재96%이상，은정도교고。
The large amount of harmonics included in input current of switching power supply because of the input current wave distortion, possesses a low power factor and will pollute the power grid. An SCM and FPGA control based semi-inteligent adjustable power factor switch power supply system has been proposed aiming at the deficiency of the conventional switch power supply. The synchronous rectifying technique has been adopted in the proposed PFC circuit, so as to solve the crossover distortion of the input voltage and realize the seamless rectifying of the input voltage. In addition, the program control system will be able to monitor and display the circuit parameters in real time, so as to set the power factor of the circuit and realize the over-current protection function. The testing results show that the power factor of the efficiency of the switch power supply system is over 96%, and it has a high stability.
