【摘要】：目前QTZ63自升式塔式起重機(jī)的調(diào)速方式是傳統(tǒng)的轉(zhuǎn)子串電阻調(diào)速與變極調(diào)速。然而這樣的方式存在很多缺點(diǎn)：調(diào)速速比小,效率低,能耗高,對(duì)機(jī)械結(jié)構(gòu)沖擊大,另外控制系統(tǒng)也通過(guò)運(yùn)用很多的接觸器和中間繼電器來(lái)實(shí)現(xiàn),頻繁起停容易燒毀觸點(diǎn),以致設(shè)施的可靠性差,加大了維護(hù)的工作量。本文通過(guò)對(duì)塔式起重機(jī)工作特點(diǎn)進(jìn)行分析,提出了一種基于PLC控制的變頻調(diào)速方法,用它來(lái)代替原有的調(diào)速方式,可以增加塔式起重機(jī)調(diào)速系統(tǒng)的穩(wěn)定性,通過(guò)了解塔式起重機(jī)具體工作過(guò)程,確定了PLC、變頻器的選型,根據(jù)塔式起重機(jī)安全性能的要求,對(duì)PLC程序進(jìn)行設(shè)計(jì)。并根據(jù)塔式起重機(jī)的起升、變幅、回轉(zhuǎn)、三大機(jī)構(gòu)各自的特點(diǎn)制定了閉環(huán)矢量控制、開(kāi)環(huán)矢量控制、U/f控制等不同的變頻控制方案,用MATLAB仿真轉(zhuǎn)子串電阻調(diào)速方法與變頻調(diào)速方法,在此基礎(chǔ)上,論述了變頻調(diào)速的可靠性與穩(wěn)定性,為變頻調(diào)速技術(shù)在越來(lái)越多的領(lǐng)域中普遍運(yùn)用提供依據(jù)。使用非凡的變頻控制技術(shù)和可編程序控制相結(jié)合,其運(yùn)行可靠性相比傳統(tǒng)塔機(jī)電控系統(tǒng)而言,運(yùn)行越發(fā)節(jié)能、高效、安全、可靠。
[Abstract]:At present, the speed regulation mode of QTZ63 self-lifting tower crane is the traditional rotor string resistance speed regulation and pole variable speed regulation. However, there are many shortcomings in this way: low speed ratio, low efficiency, high energy consumption, great impact on the mechanical structure, in addition, the control system is realized by using a lot of contactors and intermediate relays, and it is easy to burn down contacts from frequent stops. As a result of the poor reliability of facilities, increased maintenance workload. Based on the analysis of the working characteristics of tower crane, this paper puts forward a method of variable frequency speed regulation based on PLC control, which can increase the stability of speed regulation system of tower crane by using it instead of the original speed regulation method. Through understanding the concrete working process of tower crane, the selection of PLC, frequency converter is determined. According to the requirements of safety performance of tower crane, the PLC program is designed. According to the characteristics of lifting, amplitude changing, rotating and three main mechanisms of tower crane, the closed loop vector control, open loop vector control, UFF control and other variable frequency control schemes are formulated. The rotor string resistance speed regulation method and frequency conversion speed regulation method are simulated with MATLAB. On this basis, the reliability and stability of frequency conversion speed regulation are discussed, which provides the basis for the universal application of frequency conversion speed regulation technology in more and more fields. Combined with special frequency conversion control technology and programmable control, its operation reliability is more and more energy-saving, efficient, safe and reliable compared with the traditional tower crane electronic control system.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TH213.3

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1 張娜;QTZ63.6010自升式塔式起重機(jī)變頻控制研究[D];內(nèi)蒙古農(nóng)業(yè)大學(xué);2016年

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本文編號(hào)：2461474