This thesis mainly studies the active power factor correction circuit using a new AC/DC Single Ended Primary Inductance Converter (SEPIC). For power factor correction, inductor current is operated in the continuous conduction mode. First of all, the converter is analyzed by state space averaging method. Furthermore, the operational principle of PFC circuit with PI control law is analyzed. A good power factor system is then developed by time-domain and frequency-domain analysis. A classical PFC circuit with PI control law has low power factor when light load. In order to overcome problem, the thesis proposes a SEPIC circuit with robust performance. Compared with circuits using classical PI controller and PFC IC, the proposed system obtains higher power factor under the condition of the same light load.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0718107-160452 |
| Date | 18 July 2007 |
| Creators | Ku, Chen-wei |
| Contributors | Jerome Chang, Geeng-Kwei Chang, Yung-Chun Wu, Tzuen-Lih Chern, I-Chih Kao |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718107-160452 |
| Rights | campus_withheld, Copyright information available at source archive |
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