DSP的雙極性可逆PWM直流調速系統(tǒng)設計
2.9萬字 52頁


摘 要
隨著時代的不斷進步，社會發(fā)展越來越信息化、現(xiàn)代化，人們的消防安全意識也在隨著增強，近年來，EPS供電系統(tǒng)以其特有的優(yōu)越性和環(huán)保性在消防應急照明等場合得到了日益廣泛的應用。與EPS相比而言，UPS除了須具有對負載不間斷供電的能力之外，還需要對輸入的市電進行穩(wěn)壓、濾波處理，來得到較高質量的電力輸出，通常適用于對計算機、通信設備、網絡設備等精密儀器的電力供應，以確保設備運行過程中的數(shù)據(jù)安全，其制作成本較高而EPS不需要對市電進行穩(wěn)壓，一般用于對電能質量要求不高的設備，在市電故障時，作為應急電源供負 載使用，但對系統(tǒng)的可靠性要求較高，其制作成本相對低廉。
本文主要從以下幾個方面對EPS系統(tǒng)進行了分析和研究:
1.針對具體應用場合的要求，給出了系統(tǒng)逆變環(huán)節(jié)、充電環(huán)節(jié)、切換環(huán)節(jié)等具體實現(xiàn)方案。
2.為提高系統(tǒng)的負載適應能力，對死區(qū)補償、切換控制方式、逆變系統(tǒng)控制方式等影響系統(tǒng)輸出性能和可靠性的諸多因素進行了研究:對沖擊性負載的起動控制方式進行了分析，并提出了具體的解決方案。
3.設計了鍵盤監(jiān)控子系統(tǒng)，能夠實時監(jiān)控EPS系統(tǒng)的運行狀態(tài)。
關鍵詞:EPS；SPWM；死區(qū)；鍵盤監(jiān)控



Abstract
With the continuous progress of the era, the society has taken on more and more modernization. At the same time, the focus of people's fire protection is increasing with it. In recent years, EPS power supply system is widely used in fire fighting and emergent lighting cases because of its predominant performance and good environment protection. compared with EPS, UPS has the capability of providing uninterruptible power for loads, furthermore, to get high quality power of output voltage, it has to deal with the input power, such as stabilizing voltage, filtering ripple, etc. It usually applies to the power provision of precise apparatus like computer, communication equipment and network equipment, etc. as a result, the cost of UPS is higher relatively. While EPS need not stabilize the input power, usually being fit for the loads which do not require high quality power. when the input power is abnormal, it can be used as emergency power. Generally, the requirement of EPS's reliability is high and the cost is low comparatively.
This paper studies the operating principle and basic components of EPS system as following points:
1. According to the request of a given application case, the implement projects of inverting, charging and switching are given in this paper.
2. To improve the adaption capability to all kinds of loads, the factors of affecting system's performance and reliability, including the compensation of dead time, the mode of switching controlling, the controlling method of inverter, etc, are studied. furthermore, the control modes of large starting current loads are researched under the rated voltage and the settlement projects are given accordingly.
3. A liquid display subsystem with the function of keyboard operating is presented in the paper and the user can monitor the system's states through it conveniently.

Keywords: emergency power supply；SPWM；dead area; keyboard monitoring


目 錄
摘要 Ⅰ
Abstract Ⅱ
1 概述 III
1.1 現(xiàn)代電力電子技術的發(fā)展 1
1.2 EPS供電系統(tǒng)的特點與工作原理 3
2 EPS逆變系統(tǒng)的研究與實現(xiàn) 6
2.1 脈沖寬度調制技術 6
2.2 SPWM逆變電路的諧波分析 11
2.3 逆變系統(tǒng)的硬件組成 12
2.3 逆變系統(tǒng)的數(shù)字化控制的實現(xiàn) 20
2.4 死區(qū)對輸出波形的影響及補償方法 24
3 PWM變流器的控制方法 26
3.1 逆變器的控制策略 26
3.2 正弦波脈寬調制技術(SPWM) 29
3.3 數(shù)字PID的基本原理 32
3.4 PWM逆變器控制策略 34
3.5 PWM整流器控制策略 37
4 EPS切換電路設計和系統(tǒng)的保護 38
4.1 切換電路的控制方式 38
4.2 EPS系統(tǒng)的保護 39
5 EPS鍵盤監(jiān)控系統(tǒng) 41
5.1 監(jiān)控系統(tǒng)的硬件組成 41
5.2 鍵盤監(jiān)控系統(tǒng)的軟件設計 44
總結 47
參考文獻 47
致謝 48


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