Distortion Due to the Zero Current Detection Circuit in High Power Factor Quasi-Resonant Flybacks

Energies

卷:14

Santi Agatino Rizzo¹  Giovanni Susinni¹  Claudio Adragna²  Giovanni Gritti² 

[1] Department of Electrical, Electronic and Computer Engineering, University of Catania, 95125 Catania, Italy;

[2] Industrial and Power Conversion Division Application Laboratory, STMicroelectronics S.R.L, 20864 Agrate Brianza, Italy;

关键词: converter control;    power factor correction;    total harmonic distortion;    flyback;    solid-state lighting;   

DOI  :  10.3390/en14020395

来源: DOAJ

【 摘 要 】

In a high-power factor quasi-resonant Flyback, an ideal zero current detection (ZCD) circuit and control circuitry enable the power switch turn-on in the exact instant a zero ringing current is reached after demagnetization. A nonzero current at the turn-on instant affects the input current shape and; consequently, affects its Total Harmonic Distortion (THD). This paper firstly deeply analyzes the effect on the distortion due to a nonideal ZCD circuit. After, some typical implementations of the ZCD circuit and their effect on the THD are analyzed, identifying their pros and cons. Finally, some experimental results are obtained to validate the analytical investigation.

【 授权许可】

Unknown