摘 要
可編程邏輯控制器(PLC)不僅在工業控制中應用越來越廣泛，而且在其他領域的應用也逐漸擴大，例如：電力、化工、能源、水利等。由于它的功能比較強大、使用安全可靠、維護簡單方便的優點，在很多地方已經取代了繼電器電路的邏輯控制。在對水中泥沙攪拌的處理過程中，需要速度控制比較穩定，而且能夠進行不同速度的操作；在拖動的處理過程中更加要求精確性。因此，PLC控制電機逐漸被人們運用到攪拌和拖動控制系統中。
本文講述了基于PLC的電動機控制系統設計和實現過程。本系統將PLC、變頻器、編碼器、電動機、攪拌器、傳感器有機地結合起來，組成一個簡單完整的自動控制系統。通過臺達WPLSoft軟件平臺編寫程序并寫入PLC后，控制電動機實現多段速的運行。
在本文中還有一個值得介紹的就是高速計數的實現。通過高速計數器可以對拖動系統進行精確的控制，并且把計數值存放于固定的寄存器，以方便其他設備完成對系統的操作和監控。
關鍵詞：PLC 電動機 高速計數器
ABSTRACT
Programmable Logic Controller (PLC), not only in the application of industrial control more and more widely, but in the application of other fields have also gradually expanded, such as: electric power, chemical, energy, water and so on.。 Because of its powerful features, the safety and reliability of use, easy to maintain , it has replaced the circuits logic control in many places. In the sediment of water mixing process,speed controling is more stable, and it can be operated at different speeds; in the processing of dragging,it needs more reliability . Thus, PLC controlling motor is applied to mixing and dragging control system gradully.
This article describes design and implementation process of the PLC-based motor controlling system . PLC,Inverter, encoders, motors, mixers and sensors are combined to form a simple, complete automatic control system.Programs are designed and wrote into PLC through the software platform of Delta WPLSoft, then control multi-speed motor operation.
In this paper the realization of high-speed counting is described valuablely. High-speed counter can control the dragging systems precisely, and keep the data in the fixed register in order to make other equipments operate and monitor the system convientely.
Key words: PLC motor high-speed counter
目 錄
第一章 緒論1
1．1 題目來源及課題意義1
1．2 文章概述1
1．3 設計思路2
第二章 電動機篇3
2．1 電動機概述及分類3
2．2 交流異步電動機4
2．3 電動機變頻調速5
2．4 變頻調速的控制原理7
第三章 編碼器篇9
3．1 編碼器雜談9
3．1．1 編碼器的發展史9
3．1．2 編碼器的分類9
3．2 旋轉編碼器10
3．2．1 旋轉編碼器的工作原理10
3．2．2 旋轉編碼器的分辨率和精度11
3．3 臺達編碼器ES3-02CN694112
第四章
