臺灣博碩士論文加值系統

在可調速馬達驅動系統中，通常使用二極體整流器將交流市電轉換成直流電力。有許多二極體整流器發表於文獻，例如:單相二極體整流器，三相六脈波二極體整流器，和三相十二脈波二極體整流器。在這些二極體整流器架構中，三相十二脈波二極體整流器的優點為，簡單、可靠性高和低直流電壓漣波。然而，三相十二脈波二極體整流器的缺點為，會產生諧波電流和缺乏回生功能。因此，本研究提出用於三相十二脈波二極體整流器的輔助轉換器，去達成消除諧波電流和提供回生功能。

三相十二脈波二極體整流器系統包含隔離變壓器 Tr I (Δ-Δ-Y，圈數比為 1: 1: 0.577) 、整流器 I、整流器 II、和等效馬達負載RL。輔助轉換器和三相十二脈波二極體整流器在直流側利用二極體Df相接，在交流側利用隔離變壓器(Tr I 和 Tr II)相接。當馬達驅動器消耗能量時，輔助轉換器操作如同並聯式主動濾波器，消除三相十二脈波二極體整流器所產生的諧波電流。當馬達驅動器減速回生能量時，輔助轉換器操作如同主動前端轉換器，將回生能量送回交流電力系統。 本研究所提輔助轉換器有兩大功能，操作並聯式主動濾波器功能時，可消除三相十二脈波二極體整流器所產生的諧波電流，操作主動前端轉換器功能時，可將回生能量送回交流電力系統。因此本研究所提輔助轉換器用於三相十二脈波二極體整流器，和以往的技術相比，表現出優異的性能。

In adjustable speed motor drive systems, the diode rectifiers are utilized to converter the AC utility into DC bus voltage. A variety of diode rectifiers were presented in the previous study such as: single phase diode rectifiers, three phase 6-pulse diode rectifiers, and three phase 12-pulse diode rectifiers. Among various diode rectifier schemes, three phase 12-pulse diode rectifiers have advantages such as:
simplicity, high reliability, and low DC bus voltage ripple; however, they also result in some disadvantages including harmonic current and the lack of regeneration capability. Therefore, this study proposes an auxiliary converter (AXC) for 12-pulse diode rectifiers to mitigate the harmonic current and provide re-generation capability.

The 12-pulse diode rectifiers system consists of a Δ-Δ-Y (turns ratio: 1: 1: 0.577) isolation transformer (Tr I), rectifier I, rectifier II, and equivalent motor load (RL). The AXC and 12-pulse diode rectifiers are connected on the DC side through diode (Df) and AC side through isolation transformers (Tr I and Tr II). The AXC system operates as a shunt active filter to mitigate the harmonic current drawn by the 12-pulse diode rectifiers when the motor drive consumes powers. The AXC operates as an active front-end (AFE) converter to re-generate the braking energy from DC side back to the utility when the motor brakes.

The proposed auxiliary converter operates as a shunt active filter to mitigate the harmonic currents drawn by the 12-pulse diode rectifiers and operates as an active front-end converter to provide the re-generation capability for the 12-pulse diode rectifiers. Therefore, the proposed auxiliary converter for 12-pulse diode rectifiers exhibits high performances compared with conventional schemes.

摘要 i
Abstract ii
致謝 iv
目錄 v
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 前言 1
1.2 論文架構 3
第二章 文獻回顧 4
2.1整流器簡介 4
2.2主動濾波器 11
2.3主動前端轉換器 12
2.4能量回生 15
第三章 操作原理 16
3.1 前言 16
3.2 系統架構 17
3.3 並聯式主動濾波器 20
3.4直流電壓控制器 21
第四章 模擬與實驗結果 23
4.1 簡介 23
4.2 十二脈波二極體整流器模擬 23
4.3 十二脈波二極體整流器實驗 32
第五章 結論 35
參考文獻 36
附錄 38

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