300V直流电压输入再次经过 R520、R521、R522 给 C514 进行充电,逐渐提高 VT513 的基级电位,让 VT513 重新导通,再次达到饱和状态,接着再进行翻转,就形成了自激式开关电源的震旦线路。
图2MJE13005开关管可以使用双极型晶体管和场效应管,本电路使用的是双极型晶体管,型号为MJE13005,该型号的三极管属于高反压高速开关三极管,主要用于大功率节能灯、开关电源、功率变换器等,其具有耐高压、开关速度快、安全工作区宽等优点。
前天不费吹灰之力,就修好了一台屡烧保险丝的自动螺丝机,为公司节约了三四千元维修费,因此自我感觉特牛叉,一直在吹水!但同事们却都不以为意,纷纷嗤之以鼻,在一旁冷笑着说:“你修好这台自动螺丝机,是整块换的,并不算什么技术,这样谁不会修?有本事的就把那个电源也修好!
一般地,开关电源大致由输入电路、变换器、控制电路、输出电路四个主体组成。如果细致划分,它包括:输入滤波、输入整流、开关电路、采样、基准电源、比较放大、震荡器、V/F转换、基极驱动、输出整流、输出滤波电路等。
With the rapid development of modern communication technology, communication power of the weight, volume, reliability, efficiency, and put forward higher requirements. The power applied to the phase-shifted full-bridge where the DC/DC converter has a simple structure, high output power, high efficiency, easy to realize soft-switching, the power switch is exposed to a series of voltage and current stress of the advantages, therefore, its study is of great significance. This article first DC/DC boost converter current triggering the main circuit, input circuit, feedback circuit control chip, push-pull transformers were in detail.The focus of the MOS FET loss problems were studied and analyzed. Secondly, the paper also used in this study a brief introduction devices and gives the necessary parameters of the device, the establishment of a model and simulation using Protel Altium Designer 6.9 software to analyze the stability of the system. Finally, the simulation results according to their actual circuit and thus made all the normal debugging, achieves the required effect.
原本这次想写反激式开关电源的,这个主题虽然以前也写过,但那时候道行太浅,如今再写应该会更深入些,不过今天我还是把魔掌伸向了同步整流,一是我最近接触这个比较多,二是反激式开关电源的内容还没准备好,先拿这个过渡一下。