Implementation of a Sensorless Single-phase Fan Motor Drive System and Its Integrated-Circuit Chip Design

• Main Authors: Chen-Ta Lu, 路承達
• Other Authors: Tian-Hau Liu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/69730486947544660807

碩士 === 國立臺灣科技大學 === 電機工程系 === 96 === This thesis proposes the implementation of a sensorless single-phase fan- motor drive system and its relative integrated circuit design. Two different drive methods are proposed here. First, the structure, principle, and mathematical model of the single-phase fan-motor are introduced. Next, the implemented drive system is discussed. A digital signal processor, TMS320LF2407A, is used as the control center to reduce the complexity of the hardware circuit. In the proposed method 1, an external A/D converter is used to convert the analog signal into digital signal, and then to determine the zero crossing of the back emf. The zero crossing can be used to determine the phase-commutation time and the rotor speed, and then achieve a closed-loop control system. Next, in the proposed method 2, the variable voltage and frequency method, is proposed to control the speed of the motor. Some strategies are used to slove the restarting problem and the initial position problem. After that, a field programmable gate array, CycloneⅡ EP2C20F484C8, made by Altera company, is used to replace the digital signal processor. Finally, an integrated circuit is developed by combining the analog circuits and digital circuits.The integrated circuit uses the application specific integrated circuit (ASIC) technique. Finally, some simulated results and experimental results are provided to validate the feasibility and correctness of the proposed methods