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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳耀銘(Yaow-Ming Chen) | |
| dc.contributor.author | Feng-Yu Wu | en |
| dc.contributor.author | 吳峰羽 | zh_TW |
| dc.date.accessioned | 2021-06-08T03:10:02Z | - |
| dc.date.copyright | 2017-07-20 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-05-30 | |
| dc.identifier.citation | [1] 80 PLUS® certified power supplies and manufacturers. [Online]. Available: http://www.80plus.org/index.htm
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/20914 | - |
| dc.description.abstract | 一些原因使得切換式電源轉換器導致脈寬調變抖動，如降低電磁干擾和高頻寬的設計方案。本論文主旨為提出兩種效率模型適用於分析脈寬調變抖動對切換式電力轉換器之影響: 平均效率模型與多頻率效率模型。本文首先藉由電路模型推導，將傳統小訊號模型中所忽略的兩個擾動訊號源之乘積納入考量，進而推衍出一個新的平均效率模型。然而由於脈波寬度比較器之增益為非線性，本文進一步藉由多頻率小訊號模型為基礎，推衍並補足既有的多頻率小訊號模型，發展出一個新穎之多頻率效率模型。本文所提出之多頻率效率模型可以涵蓋平均效率模型外，並具有可適用於高頻訊號、任意週期性波形訊號分析之特點。本文最終也提出脈寬調變抖動對切換式電力轉換器效率下降的建議方案。此外本文也藉由數學推導與圖示，來說明一般電力電子轉換器於量測穩定度時，其波德圖曲線在開關切換頻率之整倍頻的突波現象。最後，以電腦模擬與測試機台來驗證與所提出的效率模型相符。 | zh_TW |
| dc.description.abstract | There are several reasons to cause the PWM jitter in power converter such as EMI reduction, and the side effect of high bandwidth design. The primary objective of this dissertation is to propose two efficiency models for evaluating the impact of the PWM jitter on the efficiency of switching-mode power converter: average efficiency model and the multi-frequency efficiency model. By taking the product of two perturbation terms into consideration, which is ignored in the conventional average small-signal model, the average efficiency model is proposed first. Due to the nonlinear characteristic of the PWM comparator, the multi-frequency efficiency model is also developed by considering the sideband frequency. The proposed multi-frequency efficiency model not only covers the average efficiency model but also apply for high frequency signal and arbitrary periodic wave. Eventually, the methods to reduce the efficiency impact caused by the jitter are suggested. In addition, the reason of control-to-output gain’s magnitude spike on the Bode plot can be explained by the derived equations. In spite of various perturbation frequencies, amplitudes, and waveforms, the mathematical calculation, the computer simulation, and the hardware measurement of the efficiency impact are consistent which validate the accuracy of the proposed multi-frequency efficiency model. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T03:10:02Z (GMT). No. of bitstreams: 1 ntu-106-D98921015-1.pdf: 7195313 bytes, checksum: e6cf07a24d34307313d76867fdc23b39 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 口試委員審定書 i
誌謝 ii 摘要 iii Abstract iv Table of Contents v List of Figures vii List of Tables x Chapter 1 Introduction 1 1.1 Research Background and Motivation 1 1.2 Contributions 4 1.3 Dissertation Outline 5 Chapter 2 Literature Survey 6 2.1 PWM Jitter Applications 6 2.2 Efficiency Improvement Methods 10 2.3 Efficiency Model 12 Chapter 3 Average Efficiency Model 15 3.1 PWM Behavior 15 3.2 Derivation of the Equivalent Circuit Averaging Model 19 3.2.1 Derivation of the Circuit Averaging Model 25 3.3 The Proposed Average Efficiency Model 28 3.4 Summary 34 Chapter 4 Multi-frequency Efficiency Model 35 4.1 Nonlinearity of PWM Comparator Characteristic 35 4.1.1 Disappearance Sideband Components from Simulation and Measurement 37 4.2 Derivation of the PWM Modulation Gains 39 4.2.1 PWM Modulation Gain: Fm 40 4.2.2 PWM Modulation Gain: Fm+ 46 4.2.3 PWM Modulation Gain: Fm- 50 4.3 The Proposed Multi-Frequency Efficiency Model 54 4.3.1 Two Kinds of Special Frequency Points: nfs and 2nfs 56 4.4 Summary 66 Chapter 5 Computer Simulation and Experiment Verifications 67 5.1 Computer Simulation 67 5.2 Experiment Setup and Results 74 5.3 Summary 85 Chapter 6 Conclusions and Suggested Future Works 86 6.1 Conclusions 86 6.2 Suggested Future Works 87 Appendix A AC Components of the Input Power and Output Power Derivations for Square Wave Pertubation Signal. 88 Appendix B AC Components of the Input power and Output Power Derivations for Triangle Wave Pertubation Signal. 92 References 96 Vita 101 | |
| dc.language.iso | en | |
| dc.subject | 多頻率效率模型 | zh_TW |
| dc.subject | 脈寬調變 | zh_TW |
| dc.subject | 抖動 | zh_TW |
| dc.subject | 平均狀態小訊號模型 | zh_TW |
| dc.subject | 多頻率小訊號模型 | zh_TW |
| dc.subject | 平均效率模型 | zh_TW |
| dc.subject | Multi-frequency efficiency model | en |
| dc.subject | Pulse-Width-Modulation (PWM) | en |
| dc.subject | Jitter | en |
| dc.subject | Average small-signal model | en |
| dc.subject | Multi-frequency small-signal model | en |
| dc.subject | Average efficiency model | en |
| dc.title | 脈寬調變抖動對切換式電源轉換器之效率影響 | zh_TW |
| dc.title | Impact of PWM Jitter on the Efficiency of Switching-Mode Power Converters | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 博士 | |
| dc.contributor.oralexamcommittee | 陳德玉(Dan Chen),潘晴財(Ching-Tsai Pan),賴炎生(Yen-Shin Lai),邱煌仁(Huang-Jen Chiu) | |
| dc.subject.keyword | 脈寬調變,抖動,平均狀態小訊號模型,多頻率小訊號模型,平均效率模型,多頻率效率模型, | zh_TW |
| dc.subject.keyword | Pulse-Width-Modulation (PWM),Jitter,Average small-signal model,Multi-frequency small-signal model,Average efficiency model,Multi-frequency efficiency model, | en |
| dc.relation.page | 101 | |
| dc.identifier.doi | 10.6342/NTU201700843 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2017-05-31 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電機工程學研究所 | zh_TW |
| 顯示於系所單位： | 電機工程學系 | |
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