本論文旨在開發一以數位訊號處理器為主之冷凍空調系統，包含一無位置感測永磁同步馬達驅動壓縮機、一無位置感測永磁同步馬達驅動散熱風扇，及一共通切換式整流器前級，並採用電力電路模組化及共通數位控制器以達到系統緊湊性。此外，為比較評估無位置感測之驅動特性，亦建立以標準永磁同步馬達驅動系統驅動之壓縮機及散熱扇。
高頻訊號注入及延伸反電動勢估測之無位置感測法均用於所發展之永磁同步馬達驅動壓縮機，比較評估了解各自之優缺點，據以發展一結合此兩種無位置感測法優點之混合式無位置感測法，以獲得廣速度範圍驅控性能之提升。所提混合法在啟動及低速驅動時採用高頻訊號注入法，在達到所設定之轉速時，平順地切換至延伸反電動勢估測無位置感測法。
由於散熱風扇之驅動性能要求較不嚴苛，故採直接責任週期電壓脈波寬度調變控制。以弦波及方波驅動之風扇均施以標準及無位置感測控制，並比較評估其操控特性。所提之無位置感測控制機構僅應用偵測並濾波之馬達單相端電壓，再藉由適當之換相移位獲得改善之驅動特性。
最後建立一共通切換式整流器前級，以建立永磁馬達驅動系統具升壓及調節良好之直流鏈電壓，並比較評估傳統及無橋式升壓切換式整流器之操控特性。受限所採數位訊號處理器TMS320F28335之PWM通道數，所建切換式整流器前級PWM訊號之產生以外加類比電路為之。

This thesis develops a digital signal processor (DSP) based air-conditioning system, it consists of a sensorless permanent-magnet synchronous motor (PMSM) driven compressor, a sensorless PMSM driven cooling fan and a common switch mode rectifier (SMR) front end. The system compactness is achieved through power circuit modularization and common digital control environment. Besides, for making comparative driving performance evaluation, the standard PMSM drives for the compressor and the fan are also established.
In the developed PMSM driven compressor, both high-frequency signal injection (HFI) and the extended-EMF (EEMF) sensorless control methods are applied and evaluated to comprehend their distinct merits and weak points. Then accordingly, a hybrid sensorless control scheme combining these two methods is developed to yield improved driving performance within wide speed range. In the developed control scheme, while the motor is started and driven under lower speed using HFI method, it is changed smoothly and operated using EEMF method as the speed is increased to a preset value.
As to the PMSM driven cooling fan, the direct duty-ratio voltage-mode PWM scheme is adopted for the less stringent performance requirements. The standard and sensorless controls for sine-wave and square-wave PMSM drives are all studied and evaluated. In the proposed sensorless control schemes, only one-phase motor terminal voltage is sensed and properly signal processed. Better driving performance is further achieved via commutation advanced shift technique.
Finally, a common front-end switch-mode rectifier (SMR) is formed to establish the boostable and well-regulated DC-link voltage for the followed two PMSM drives. Both the standard and the newly evolved bridgeless boost type SMRs are comparatively assessed. Owing to the limitation of pulse width modulation (PWM) channel number of the DSP TMS320F28335, the analog PWM circuit is employed as an alternative for realizing the front-end SMR.

A. Permanent-Magnet Synchronous Motor Drive
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B. Switching and Dynamic Control
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C. Commutation Tuning Control
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E. Vibration Suppression
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F. Field-Weakening Control
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G. AC/DC Switch-Mode Rectifiers
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H. Position Sensorless Control
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Back-EMF methods
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Observer based methods
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Intelligent methods
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Methods based on rotor magnet saliency
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