| Summary: | 碩士 === 國立交通大學 === 電機與控制工程系所 === 93 === This paper presents the development of a sensorless control chip for a small three-phase brushless DC(BLDC) fan motor.The fan motors mostly adopt the single-phase design now. And they need a sensor to detect the rotor position.
For various products applied to the fan motor, such as notebook, there is a trend to miniaturize. It is unavoidable to make fan motor miniaturization, light quantization, high performance and high precision.
Therefore, in this thesis, a FPGA (Field Programmable Gate Array)-based chip design is taken to implement a sensorless control chip conceptual core for three-phase BLDC fan motor drive, utilizing VHDL (Very High Speed Integrated Circuit(VHSIC) Hardware Description Language) modulation techniques and competence from system planning level opinion, improving the single-phase characteristic reached of fan motor at present.
The proposed sensorless drive scheme is verified with the Visual C++ simulation first, and then is realized with FPGA-based chip collocating with voltage sensing circuit, motor drive and peripheral circuit for constructing a sensorless control system for a three-phase BLDC fan motor.
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