臺灣博碩士論文加值系統

本文旨在製作無刷直流電動機之轉速控制系統，以為電動載具之推進器之用。本文之系統採用數位信號處理器作為控制核心，不僅能降低成本，且能提高轉速響應。文中亦採用低價位之霍爾效應的磁極偵測元件，以回授六步方波的磁極位置，並以磁極位置估測實際轉速。轉速及電流閉回路控制，皆由數位軟體完成之。
為提升轉速響應性能，本系統在無刷直流電動機之六步激磁控制中，加入了電流閉回路控制，同時採用相峰值電流控制策略，在三相系統下，只需要一個直流成分之電流命令，即可控制三相電流，使得控制更近似於線性化。在電流調節器方面，當負載變動時，電流控制器之選擇開關會依據實際電流與命令電流之誤差值，選用適當之電流調節器，以改善相電流漣波及提高響應速率。
本文已完成實體製作，並建立200W之無刷直流電動機控速系統，在起動及負載變動之測試結果，驗證了系統的可行性。

This thesis presents the analysis and implementation of a wide-speed control system for brushless dc motors. A digital signal processor (DSP TMS320F240) is used to complete the whole digital control system to reduce hardware complexity and increase the speed response. A Hall-effect sensor is also used to detect rotor position and estimate rotor speed. In addition, speed and current feedback are invoked to realize the proposed high performance system. Specifically, a current feedback technique which is conducted by peak phase current control algorithm is implemented to control output current. This will not only reduce control complexity in three-phase system, but also promote linearity of the proposed control system. Finally, a current regulator is also introduced to adjust current command automatically through the error between command current and armature current of motor to reduce output current ripple.
A 200W brushless dc motor is built and experiments are given to justify the analysis.

中文摘要 i
英文摘要 ii
誌 謝 iii
目 錄 iv
符號索引 vi
圖表索引 viii
第一章 緒論 1
1.1 研究動機 1
1.2 系統架構 2
1.3 本文大綱 2
第二章 無刷直流電動機之結構及控制 4
2.1 前言 4
2.2 無刷直流電動機之結構 4
2.3 無刷直流電動機之控制 9
2.4 結語 12
第三章 電流及轉速控制系統之設計 13
3.1 前言 13
3.2 無電流閉回路控制之六步激磁控制 13
3.3 具電流閉回路控制之六步激磁控制 14
3.3.1 三相電流之磁滯控制 14
3.3.2 相峰值電流控制 17
3.3.3 混合型電流控制器 20
3.4 轉速控制系統 21
3.5 結語 22
第四章 實體製作及實驗結果 24
4.1 前言 24
4.2 硬體電路 24
4.2.1 數位信號處理器之介面電路 24
4.2.2 電流回授電路及過電流保護電路 26
4.2.3 功率電晶體驅動級電路 26
4.2.4 轉速估測用之電路 27
4.3 軟體規劃 28
4.4 實測結果 31
4.5 結語 46
第五章 結論與建議 47
5.1 結論 47
5.2 建議 48
參考文獻 49
附錄A 無刷直流電動機之額定及量測之參數 52
作者簡介 53

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