电测与仪表
電測與儀錶
전측여의표
ELECTRICAL MEASUREMENT & INSTRUMENTATION
2013年
3期
120-123
,共4页
王永攀%朱忠尼%王涛%李金%屈建国%黄茹萍
王永攀%硃忠尼%王濤%李金%屈建國%黃茹萍
왕영반%주충니%왕도%리금%굴건국%황여평
FIFO%多路移相信号%驱动信号%交错并联%移相全桥%移相控制
FIFO%多路移相信號%驅動信號%交錯併聯%移相全橋%移相控製
FIFO%다로이상신호%구동신호%교착병련%이상전교%이상공제
FIFO%multi -channel phase shifting signals%driving signal%parallel interleaving%phase -shifted full bridge%phase shift control
在大功率开关电源的研制过程中,多模块交错并联移相全桥变换器拓扑结构逐渐成为研究趋势,往往需要多路移相驱动信号.然而使用多个移相控制芯片同步工作产生的移相控制信号会出现移相角度不准确的情况.为了产生准确的多路移相信号,提高多模块交错并联DC/DC变换器的性能,本文提出了一种基于FIFO芯片的多路移相信号的产生方法,该方法能够准确的对多路信号进行移相,并且能够在0~180°范围能够对输入的四路PWM信号同时进行移相.最后设计了产生20kHz八路移相控制信号的电路,并给出了实验波形.
在大功率開關電源的研製過程中,多模塊交錯併聯移相全橋變換器拓撲結構逐漸成為研究趨勢,往往需要多路移相驅動信號.然而使用多箇移相控製芯片同步工作產生的移相控製信號會齣現移相角度不準確的情況.為瞭產生準確的多路移相信號,提高多模塊交錯併聯DC/DC變換器的性能,本文提齣瞭一種基于FIFO芯片的多路移相信號的產生方法,該方法能夠準確的對多路信號進行移相,併且能夠在0~180°範圍能夠對輸入的四路PWM信號同時進行移相.最後設計瞭產生20kHz八路移相控製信號的電路,併給齣瞭實驗波形.
재대공솔개관전원적연제과정중,다모괴교착병련이상전교변환기탁복결구축점성위연구추세,왕왕수요다로이상구동신호.연이사용다개이상공제심편동보공작산생적이상공제신호회출현이상각도불준학적정황.위료산생준학적다로이상신호,제고다모괴교착병련DC/DC변환기적성능,본문제출료일충기우FIFO심편적다로이상신호적산생방법,해방법능구준학적대다로신호진행이상,병차능구재0~180°범위능구대수입적사로PWM신호동시진행이상.최후설계료산생20kHz팔로이상공제신호적전로,병급출료실험파형.
In the process of studying high-power switch power supply, the multi-module parallel interleaving phase-shifted full bridge topology has become a research tend, there always need multi-channel phase shifting signals. However, it will appear the situation that the phase shifting angle isn’t accuracy when adopting several phase -shifted chips working in synchronous mode. To generate the accuracy phase shifting signals and improve the performance of the converter, this paper puts forward a method in terms of generating phase shifting multi-signals on the basis of FIFO, this method can shift the phase of multi-channel signals accurately, it can also shift the four PWM input signal within the limits of 0° to 180° synchronously. Finally, a circuit of generating 20kHz eight phase shifting signals is designed and the test result is given out.
