邏輯控制無(wú)環(huán)流可逆調(diào)速系統(tǒng)設(shè)計(jì)外文翻譯-資料下載頁(yè)
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【導(dǎo)讀】重慶交通大學(xué)二O一二屆畢業(yè)設(shè)計(jì)（論文）?直流系列電機(jī)是機(jī)電一體化中需要高轉(zhuǎn)矩/速度比應(yīng)用的首選。基于微控制器和IGBT的開(kāi)環(huán)直流電動(dòng)機(jī)速度控制系統(tǒng)的設(shè)計(jì)和實(shí)施。工具，可以預(yù)測(cè)的機(jī)械和電子模塊組成的系統(tǒng)的動(dòng)態(tài)行為。本文提供的仿真結(jié)果與實(shí)。驗(yàn)室測(cè)量結(jié)果驚人的相似。吊機(jī)，起重機(jī)，驅(qū)動(dòng)器武器等。程，習(xí)慣上被稱為速度控制。通過(guò)更換或補(bǔ)充模擬與數(shù)字電路的。的主要目的是加速提出這種方法的人如何在樣機(jī)上進(jìn)行速度控制的。這個(gè)缺點(diǎn)可以通過(guò)適當(dāng)結(jié)合計(jì)算機(jī)模擬和實(shí)驗(yàn)室測(cè)試大大緩解。當(dāng)前數(shù)字技術(shù)提供了直流電動(dòng)機(jī)生成PWM開(kāi)關(guān)信號(hào)的功能和處理保護(hù)信號(hào)的功能。將因此而被降低,與此同時(shí),其可靠性得以提高。要產(chǎn)生PWM開(kāi)關(guān)信號(hào),Vcond從圖1電路輸入控制器的第一個(gè)A/D轉(zhuǎn)換器輸入。vcond因此離散成256份的水平，他們每個(gè)作為一個(gè)微控制器E2PROM的地址。因此，根據(jù)Vcond脈沖寬度在256份中不相等。通過(guò)其附加的A/D轉(zhuǎn)換器輸。些PWM信號(hào)通過(guò)門的驅(qū)動(dòng)和輸出功率機(jī)建立模型。
【正文】 was opted instead for representing the PWM function only by means of a rectangular wave generator with its pulse width being varied in 256 steps according to the output of the pedal signal conditioner. Before being injected into the motor model, these PWM signals are passed through the gate driver and the power output models. It should be mentioned here that, apart from the protection against loss of pedal signals, the other protection functions of the microcontroller and their associated circuitry were not included in the simulation. The detailed diagram for the pedal signal conditioner is the one provided in Fig. 1, while the diagrams for the gate driver and for the power output stage are provided in Fig. 2 and Fig. 3 An advantage of using SPICE for the modeling of these blocks is the access to a vast library of models for mercially 重慶交通大學(xué)二 O一二 屆畢業(yè)設(shè)計(jì)（論文） ?譯文 available devices [4]. Only the model for the IGBT module was not in this library, but it could be easily downloaded from the manufacturer39。s web information site. Before its physical implementation, the speed control SPICE model was tested along with the ABM motor model. This permitted the debugging and finetuning of the preliminary design even before its implementation. 4. Conclusions A methodology for developing plex electronic– electromechanical prototypes has been presented in this paper. It consists essentially in bining puter simulations with laboratory tests. This methodology has been further applied in the development of a speed control for an 1 hp DC series motor. The simulation tools adopted here are PSPICE from OrCAD and its ABM utilities. While PSPICE has permitted a detailed representation of the electronics and power electronics modules which include manufacturers39。 supplied modules, the ABM utilities have enabled the accurate description of the motor39。s electromechanical features. The conjunct simulation of the motor and its speed control has thus been possible. The agreement attained here between simulations and laboratory tests has been satisfactory. Previous works by others (CheeMun, INTUSOFT, HDLA Mentor) have simulated speed controls coupled to very simple (one branch) motor models. The ABM model provided here accounts for more realistic motor features. It can be further adopted by other developers and the paper provides the necessary data for reproducing the results presented here. Third parties, in addition, may even modify this model with relative ease to suit the particular needs for other developments. The simulations have permitted the testing and the debugging of the speed control even before it was constructed. For instance, the simulations have helped to establish that the system should not be started up with a duty cycle above 50%. 重慶交通大學(xué)二 O一二 屆畢業(yè)設(shè)計(jì)（論文） ?譯文 The overall experience with the methodology presented is that it has helped reducing development time and costs substantially. The simulations, when bined with experimental work, even supplied the lack of certain specialized instrumentation, like dynamometers. They also enabled the monitoring of inaccessible variables like the electromotive force. A remarkable fact is that not a single power electronic device was burned during this project. Finally, ongoing work is in the development of a full Hbridge speed control, as well as on applications of this to DC motors of different dimensions where the ABM model provided here may have to be modified to include additional features, like viscous friction, hysteresis and the frequency dependence of wound inductance. 文章來(lái)源：
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