內(nèi)容簡介：
碩士學位論文 剩余電流斷路器檢測裝置的研制，正文共77頁。
【摘要】 在日常生活中,因用電設(shè)備使用不當、電器產(chǎn)品質(zhì)量的低劣或線路裝置上存在不足等因素所引發(fā)的事故時有發(fā)生。剩余電流斷路器作為一種重要的低壓保護電器,能夠極其有效的防止人身觸電和漏電等事故的發(fā)生。因此,剩余電流斷路器可靠性的提高,能夠更為有效的保證用電者的人身安全,并且避免因漏電事故所引起的火災(zāi)。剩余電流斷路器產(chǎn)品的質(zhì)量與性能的可靠性易受到組成器件、外界環(huán)境、溫度、生產(chǎn)工藝、設(shè)計技術(shù)等一些因素的影響。為了提高產(chǎn)品性能的可靠性,對其剩余電流動作特性進行檢測,本文研制了一套用于檢測剩余電流斷路器性能的裝置。論文所研制的檢測裝置是以當今發(fā)展迅猛,應(yīng)用極為廣泛的直接數(shù)字頻率合成技術(shù)(DDS)為核心,以PIC16F877單片機為處理器,對單片機控制部分,測試電流的產(chǎn)生和調(diào)節(jié)部分,電流檢測部分,人機接口部分等硬件電路進行了研究與設(shè)計；并針對剩余電流動作特性的檢測特點給出了軟件設(shè)計的總體思想,運用C語言進行程序的編寫,以實現(xiàn)精確的模擬剩余動作電流以及對剩余電流斷路器動作時間、極限不驅(qū)動時間的檢測和顯示。為了進一步減小系統(tǒng)的誤差,并提高系統(tǒng)的穩(wěn)定性和精確度,本系統(tǒng)采用了閉環(huán)控制方式,軟件上利用PID(比例積分微分)算法實現(xiàn)對輸出電流幅值的精確調(diào)節(jié)。在完成上述設(shè)計過程以后,本文最后就系統(tǒng)的調(diào)試過程作了簡單的說明,并給出了實驗與分析結(jié)果。經(jīng)實驗結(jié)果分析可知,本文所設(shè)計的檢測裝置能夠很好的實現(xiàn)對剩余電流斷路器動作特性的檢測。該檢測裝置與現(xiàn)有的檢測裝置相比,優(yōu)勢在于其測試電流具有高精確度、高穩(wěn)定性,并且可由程序控制等優(yōu)勢。
【Abstract】 Accidents are frequently occurred due to the improper use of electrical equipments, poor quality of device or some deficients of the device applied in line in daily life. Residual current circuit breaker (RCCB) is a kind of important low-voltage electrical protection appliance which can provide a protection from elecric shock or leakage. Thus the improvement of RCCB’s reliability means the enhancement of its efficiencc in personnel safty ensurance and avoiding the accidents such as fire initiated by electric leakage. The quality and performance of RCCB is affectted by those factors such as component, external environment, temperature, production technology, design technology. This paper presents a device which can be used to determine the performance of RCCB in order to improve the product’s reliability by detecting its residual current operation properities.The device this paper presents is based on direct digital frequency synthesis (DDS) which is developed rapidly and with widely application currently. PIC16F877 is also adopted as processor, and the design of its control parts, generation and adjusting parts of detection current, current detection parts, man-machine interface and some other hardware parts are also included. Furthermore, the software design overall idea with the consideration of the characteristics of residual current operation properities is provided and programmed in C language for the precise simulation of residual current, also with the detection and display of RCCB operation time and limiting non-actuating time. Closed-loop control mode is applied for the further reduction of system errors and improvement of system stability and precision. And its software is with PID (proportional integral derivative) algorithm in order to regulate the output current’s amplitude accurately. Brief introduction of the debugging process and the result of experiment and anlysis are given in the end of this design process.With the anlysis of experiment results, it can be concluded that this devcie is qualified for the detection of the residual current circuit breaker operation properities, and it show with the advantages of high precision, high stability and programmable comparing with traditional one.
【關(guān)鍵詞】 剩余電流斷路器； DDS； 單片機； plD控制算法；
【Key words】 RCCB； DDS； SCM； PID Control Algorithm；
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