臺灣博碩士論文加值系統

本論文提出了一個應用於迴轉式空調壓縮機轉速控制之無感測永磁同步馬達驅動器之研製。於本篇論文中，提出了一近似弦波脈波寬度調變驅動方法。此外，本架構也加入電流回授控制方法與轉子磁極位置偵測。本論文所提出之驅動方法，將與方波驅動無電流回授控制及六步方波驅動具電流回授控制進行比較。同時，針對應用於空調壓縮機系統之功率因數修正技術，對於被動式與本論文所提出之並聯半主動式之功因修正技術，進行了深入的研究與探討。實驗結果顯示，藉由本論文所提出之並聯式半主動功因修正技術，與無感測近似弦波脈波寬度調變驅動方法，應用於空調壓縮機驅動器之研製，於前端電源品質，可有效提昇系統整體功率因數，並於壓縮機輸出結果獲得，透過無感測近似弦波驅動方法，可有效降低轉速漣波、減少壓縮機振動，並改善空調系統整體的功率消耗。

This thesis presented a sensor-less permanent magnet synchronous motor (PMSM) driver for controlling air-conditioner rotary compressor speed. In this thesis, a quasi-sine pulse-width modulation (PWM) driving method was proposed. Furthermore, the current feedback control scheme and rotor magnet pole position detection were included. The system structure was implemented by using a digital signal processing (DSP) platform. The proposed driving scheme was compared with the square-wave driving without current feedback and six-step square-wave driving method with current feedback. Moreover, the passive and shunt semi-active power factor correction (PFC) technique were researched for the air-conditioner application. Experimental results demonstrated that the system power factor could be improved by the proposed shunt semi-active PFC method. Besides, the proposed sensor-less quasi-sine PWM driving method implemented in an air-conditioner compressor driver was capable of reducing the magnitude of rotational speed ripples, compressor vibration, and system power consumption.

中文摘要…………………………………………………………………...i
Abstract…………………………………………………………………….ii
Figure List………………………………………………………………….v
Table List………………………………………………………………...viii
Chapter 1 Introduction…………………………………………….……… 1
Chapter 2 Air-conditioning theory and Refrigerant Compressor……….....5
2.1 The Air-conditioning Theory……………………………………..5
2.2 The Refrigerant Compressors……………………………………….8
2.2.1 The Reciprocating Compressors………………………………..9
2.2.2 The Rotary Compressors……………………………………..10
2.2.3 The Scroll Compressors……………………………………….12
Chapter 3 PMSM Mathematical Model…………………….…….………14
3.1 PMSM Electrical Derivations……………………………………...14
3.2 PMSM Mechanical Dynamic Equations…………………………...16
Chapter 4 Sensor-less Driving Methods for Compressor Speed Control...18
4.1 The Starting Method……………………………………………….19
4.1.1 Inductance variation Techniques for Starting………………...20
4.1.2 Control System Techniques for Starting……………………...20
4.1.3. Align and Go Starting………………………………………...21
4.2 The Back-EMF Detection Method………………………………22
4.2.1 ZCP Determination When PWM is ON……………………….22
4.2.2 ZCP Determination When PWM is OFF……………………...24
4.3 Six-step Square-wave Driving Method……………………………26
4.4 The Proposed Quasi-sine PWM Driving Method………………….30
4.5 The Pulse-Width Modulation………………………………………37
Chapter 5 Power Factor Correction Technique for Air-conditioner Application……………..…………………………………...…………….40
5.1 Power Factor Definition……………………………………………40
5.2 Power Factor Correction Techniques……………………………...42
5.2.1 Passive Power Factor Correction Techniques………………...43
5.2.2 Active Power Factor Correction Techniques…………….…...45
5.2.3 Shunt Semi-Active Power Factor Correction Technique..……46
5.3 The Simulation of Power Factor Correction.………………………51
5.3.1 Passive Power Factor Correction Method…………………….52
5.3.2 Shunt Semi-Active Power Factor Correction Method………55
Chapter 6 Experiments...……………………………...…………………..58
6.1 Digital Signal Processing Platform………………………………..59
6.2 The Inverter………………………………………………………...60
6.3 Back-EMF Detection…………………………………………...62
6.4 Current Feedback………………………………………….………63
6.5 Programming Interface……………………………………….……64
6.6 Sensor-less control and Power Factor Correction Flow….….…66
6.7 The Tested Component…………………..…………………….…69
Chapter 7 Results and Discussion…………...……………………………71
Chapter 8 Conclusions and Future Work.………………………….……..90
8.1 Thesis Summary…...…………………………………………….…90
8.2 Recommendations...……………………………………………..…91
References………………………………………………………………..92

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