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A Sensorless Speed Control Driver for Two-phase Half Wave Brushless DC Fan Motor

The design and implementation of speed control driver, which is applied to two-phase brushless DC fan motor is presented in this thesis. In addition, motor coils current limiter, output-stage Snubber circuit, and lock detection and auto-restart circuit are added to the driver for the sake of increasing stability and robustness. Because of high frequency energizing noise and dispensable power consumption problems generated by open-loop fixed frequency PWM speed control approach, several closed-loop speed control methods with speed estimation signal feedback are adopted for improvement. Furthermore, this thesis proposes a sensorless driving control strategy to eliminate Hall sensor in rotor position detection, and similarly has closed-loop speed control methods to achieve the goal of driver cost reduction, size decrease, and good control performance.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0718107-161603
Date18 July 2007
CreatorsChao, An-Li
ContributorsYung-Chun Wu, Tzuen-Lih Chern, I-Chih Kao, Geeng-Kwei Chang, Jerome Chang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718107-161603
Rightscampus_withheld, Copyright information available at source archive

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