可偵測間距與負載之單級高功因非接觸供電系統

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姓名

朱柏光(Bo-Guang Jhu) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

可偵測間距與負載之單級高功因非接觸供電系統
(Single-Stage Non-Contact Power System Having High Power Factor With Gap and Load Detection)

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摘要(中)

本文主要為研製一可偵測間距與負載之單級高功因非接觸供電系統，將升壓式轉換器操作在不連續導通模式，達到自發性功因校正之功能。結合半橋串聯諧振式轉換器，將開關切換頻率操作在諧振頻率之上，達到零電壓切換，減少開關切換損失。此外，提出間距與負載偵測機制，利用電磁耦合的原理，設計一個可同時傳輸能量與訊號之非接觸供電系統，將訊號迴授至一次側微控制器。實驗證實，在不同間距與負載，間距訊號線圈和鐵心間距有關，負載訊號線圈和輸出負載有關，利用一次側變頻方式控制二次側輸出電壓穩定，系統之功因可達到0.986以上並且符合IEC 1000-3-2 Class-D之諧波規範。本文所提之可偵測間距與負載之單級高功因非接觸供電系統具有架構簡單、低成本、高功因與低諧波干擾等優點。

摘要(英)

In this thesis, a single-stage non-contact power system having high power factor with gap and load detection is porposed. The boost converter is operated in discontinuous conduction mode (DCM) for achieving power factor correction(PFC). In order to achieve zero-voltage switching and reduce the switching loss, with half-bridge series resonant converter, the switching frequency is designed to be higher than the resonant frequency. Furthermore, this study proposed the gap and load detection mechanisms, based on electromagnetic theory. The designed non-contact power system, is able to transfer energy and signal simultaneously. Under variation of gap and load, experimental results verify that the signal of gap detection core is related to the gap and the signal of load detection core is related to the output, by varing the primary switchting frequency to controll the output voltage . The proposed system successfully meets IEC 1000-3-2 Class-D requirements and power factor can be achieved up to 0.986. The proposed single-stage non-contact power system having high power factor with gap and load detection has the advantages of simple structure, low component count, high power factor and low harmonic.

關鍵字(中)

★ 單級
★ 非接觸供電系統
★ 半橋串聯諧振式轉換器
★ 間距偵測
★ 負載偵測
★ 變頻

關鍵字(英)

★ half-bridge series resonant converter
★ gap detection
★ single-stage
★ non-contact power system
★ load detection
★ varying frequency

論文目次

第一章緒論 01
1.1研究動機 01
1.2研究背景 01
1.3研究目的與方法 02
1.4論文大綱 04
第二章非接觸式供電技術 05
2.1非接觸式與接觸式供電技術之差異 05
2.2非接觸式供電技術之發展 07
2.2.1非接觸式電路拓樸 07
2.2.2非接觸式鐵心形狀 09
2.2.3非接觸式控制方法 11
2.2.4非接觸式應用領域 12
2.3技術開發與設計考量 15
第三章主動式功率因數校正技術 18
3.1功率因數定義 18
3.2主動式功率因數校正電路之控制方法 21
3.2.1磁滯電流控制(Hysteresis Current Control) 23
3.2.2峰值電流控制(Peak Current Control) 24
3.2.3平均電流控制(Average Current Control) 25
3.2.4電壓隨耦控制(Voltage Follower Control) 26
3.3升壓式電源轉換器之功率因數校正分析 27
3.3.1電路工作原理 27
3.3.2升壓式電源轉換器功因校正之驗證 29
第四章非接觸式供電系統負載與間距之偵測 33
4.1變壓器磁路模型之建立 33
4.1.1雙埠網路法 33
4.1.2變壓器磁路模型之分析 37
4.1.3型鐵心不同繞製方式之等效磁路模型[43] 39
4.2非接觸式變壓器繞製 41
4.3間距與負載之偵測 42
4.4等效磁路模擬 46
第五章可偵測間距與負載之單級高功因非接觸供電系統
47
5.1系統結構 47
5.2輸入級單元 48
5.2.1 EMI(Electro Magnetic Interference)濾波器 48
5.2.2突波吸收器與橋式整流器 49
5.2.3交流/直流轉換器(輔助電源) 50
5.3功率級單元(單級高功因非接觸供電系統) 51
5.3.1半橋串聯諧振轉換器 51
5.3.2單級高功因非接觸供電系統 55
5.3.2.1電路工作模式與主要波形 56
5.3.2.2功率開關驅動電路 62
5.4迴授控制單元 63
5.4.1微控制器(PIC18F2431) 63
5.4.2間距與負載偵測電路 64
5.4.3控制流程規劃 66
5.5非接觸變壓器單元 67
5.6輸出級單元 68
第六章實驗與模擬 70
6.1系統規格 70
6.2實驗與模擬結果 71
6.2.1功因校正之驗證 71
6.2.2輸入儲能電感電流與下橋開關切換波形 78
6.2.3上、下橋開關零電壓切換與諧振波形 79
6.2.4間距與負載偵測訊號波形 83
6.2.5不同間距大小，偵測訊號對負載變化之關係 83
6.2.6一次側變頻控制輸出穩壓之波形 84
6.3實驗結果分析與討論 86
6.4硬體電路照片 88
6.4.1實驗儀器 88
第七章結論與未來展望 89
參考文獻 91
作者簡歷 97

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指導教授

徐國鎧(Kuo-Kai Shyu)

審核日期

2007-7-16

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