The Research of Power Rectifier's Reverse Recovey Characterization

• Main Author: 陳威桓
• Other Authors: Prof. Jeng Gong
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/57358245589512546551

碩士 === 國立清華大學 === 電子工程研究所 === 93 === ABSTRACT One of the most important characterization of rectifiers is the reverse recovery characteristic. We had to avoid the current and voltage overshoot caused by reverse recovery process damaging the circuit component. Using three testing circuit to compare the switching speed and the reverse recovery characteristic of rectifiers. First is the clamped inducitive switching circuit , discriminating is easy discriminating between good and bad of recovery characteristics. Second, Hard- Switching circuit make the comparison of rectifiers recovery ability easy by lightly adjustments of testing conditions. Final, soft-switching circuit is flexibly modified from hard-switching to ZVC by addition of a resonant capacitor and a resonant inductor, Show us the advantages of ZVC is protecting the circuit configuration. Discussing the influence of Trr and Qrr by the different definitions of the reverse recovery time, servicing all the rectifiers user clearly to make out good and bad of recovery characteristics without measuring personally.