For energy conservation of sensorless two-phase half-wave brushless DC fan, this thesis develops a driver based on analogy circuits with current feedback control and speed feedback control. The main parts of the system include a sensorless start-up circuit, a sensorless commutation detection circuit, a speed feedback control circuit and a current feedback control circuit. Finally, we design experiments to compare it with outside PWM open-loop control and speed feedback control on experiment, the result shows that the driver with both current feedback control and speed feedback control displays better efficiency and lower vibration.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-1025110-174409 |
| Date | 25 October 2010 |
| Creators | Kuo, Jhe-Gang |
| Contributors | Yung-Chun Wu, Tzuen-Lih Chern, Chieh-Neng Chang, Geeng-Kwei Chang, Guan-Syong Huang |
| 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-1025110-174409 |
| Rights | not_available, Copyright information available at source archive |
Page generated in 0.002 seconds