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abstract

abstract修飾符可以用于類、方法、事件和索引指示器(indexer),表示其為抽象成員,抽象方法是沒有方法體的方法。抽象成員,即抽象類、抽象方法、抽象事件。
  • 基于DSP28335的永磁同步電機(jī)調(diào)速系統(tǒng)設(shè)計(jì)

    基于DSP28335的永磁同步電機(jī)調(diào)速系統(tǒng)設(shè)計(jì)摘要(中英文)     本控制系統(tǒng)的設(shè)計(jì)是為了實(shí)現(xiàn)基于TMS320F28335的永磁同步電動機(jī)的調(diào)速系統(tǒng),并把它引用到全電動注塑機(jī)當(dāng)中。本系統(tǒng)使用SVPWM的控制方法,通過采樣電機(jī)電流和旋轉(zhuǎn)變壓器的位置信息,實(shí)現(xiàn)速度、電流雙閉環(huán)控制。通過TMS320F28335的硬件浮點(diǎn)處理核心,實(shí)現(xiàn)應(yīng)用于永磁同步電機(jī)的浮點(diǎn)算法,去取代過去的定點(diǎn)算法,提高代碼效率。 abstract: The control system is designed to realize TMS320F28335 based on the permanent magnet synchronous motor speed control system, and put it to quoting all electric of injection molding machine. The ystem of the control method used SVPWM, through the sampling motor current and rotating transformer 1.        引言1.1 設(shè)計(jì)背景及目的    本永磁同步電機(jī)調(diào)速系統(tǒng)是全電動注塑機(jī)的其中一個應(yīng)用部分。全電動注塑機(jī)憑借著其節(jié)約能源、清潔、噪聲少、速度控制效果好、精度高、可重復(fù)性高、成本低等眾多優(yōu)點(diǎn),成為了當(dāng)下高端注塑機(jī)發(fā)展的一個方向。    全電動注塑機(jī)的所有運(yùn)動機(jī)構(gòu)都采用交流伺服電動機(jī)驅(qū)動,一個穩(wěn)定高效的永磁同步電動機(jī)驅(qū)動方案成為了全電動注塑機(jī)性能的一個總要部分。本次設(shè)計(jì)以適用于全電動注塑機(jī)的永磁同步電動機(jī)控制系統(tǒng)為目標(biāo)進(jìn)行設(shè)計(jì),采用TI公司的TMS320F28335作為控制核心。憑借TMS320F28335高速的運(yùn)算能力,適用于電動機(jī)控制的各種外設(shè),以及TMS320F283XX特有的硬件浮點(diǎn)運(yùn)算能力,進(jìn)行永磁同步電動機(jī)的調(diào)速控制系統(tǒng)的設(shè)計(jì)。

    標(biāo)簽: dsp28335 永磁同步電機(jī)

    上傳時間: 2022-05-08

    上傳用戶:

  • 基于DSP28035的高速永磁無刷直流電機(jī)驅(qū)動系統(tǒng)

    基于DSP28035的高速永磁無刷直流電機(jī)驅(qū)動系統(tǒng),包括論文和軟硬設(shè)計(jì)資料。摘要參賽作品為基于DSP28035的高速永磁無刷直流電機(jī)驅(qū)動系統(tǒng)。該系統(tǒng)以一臺額定轉(zhuǎn)速60 krpm的高速永磁無刷直流電機(jī)、交錯并聯(lián)的Buck電路以及全橋電路為硬件平臺,以DSP28035為控制核心,實(shí)現(xiàn)了調(diào)壓調(diào)速功能和基于坐標(biāo)變換的無位置傳感器新技術(shù)。為實(shí)現(xiàn)該系統(tǒng)要求,本作品充分利用了DSP28035的資源例如:CLA模塊,模擬比較器、HPWM模塊以及AD轉(zhuǎn)換模塊等。abstractThis work is the drive system for a high speed permanent magnet burshless dc motor based on DSP28035. The hardware platform consists of a BLDC motor(rated speed is 60000rpm), a Buck circuit and an inverter. Under the control of DSP28035, this system can achieve the goal of adjusting the motor’s speed with voltage and the function of sensorless control based on the coordinate transformation. By making full use of resources of the core, such as CLA, analog comparator, HPWM and AD converters, the whole system can meet the requirements.1 引言高速永磁無刷直流電機(jī)驅(qū)動系統(tǒng)由于基波頻率較高(一般在1kHZ以上),利用逆變橋斬波進(jìn)行調(diào)速的控制方式通常會受到開關(guān)管開關(guān)頻率的限制,因此該系統(tǒng)多采用三相全橋前級加Buck電路進(jìn)承擔(dān)調(diào)壓調(diào)速的功能,而三相全橋主要承擔(dān)邏輯換相的功能。然而,傳統(tǒng)Buck電路所需電感的體積較大,增加了系統(tǒng)的體積,降低了系統(tǒng)的功率密度。

    標(biāo)簽: dsp28035 直流電機(jī)

    上傳時間: 2022-05-08

    上傳用戶:bluedrops

  • 基于滑模觀測器與分?jǐn)?shù)階鎖相環(huán)的無傳感器PMSM矢量控制

    abstract: A sliding mode observer and fractional-order phase-locked loop (FO-PLL) method is proposed for the sensorless speed control of a permanent magnet synchronous motor (PMSM).The saturation function is adopted in order to reduce the chattering phenomenon caused by the sliding mode observer. In this proposed FO-PLL, method, a regulable fractional order r is involved, which means that the FO-PLL provides an extra degree of freedom. In fact, the conventional phase-locked loop (PLL) applied in sensorless PMSM control can be seen as a special case of the proposed FO-PLL. By selecting a proper fractional order r a better performance may be achieved. The computer simulation results demonstrate the effectiveness of the proposed method.Key words: fractional calculus; fractional order phase-locked loop; sensorless control; sliding mode observer; permanent magnet synchronous motor; speed controll

    標(biāo)簽: 滑模觀測器 傳感器 pmsm 矢量控制

    上傳時間: 2022-06-18

    上傳用戶:

  • 分立元件IGBT驅(qū)動電路的改進(jìn)與測試

    摘要:本文在分析1GBT的動態(tài)開關(guān)特性和過流狀態(tài)下的電氣特性的基礎(chǔ)上,通過對常規(guī)的IGBT推挽驅(qū)動電路進(jìn)行改進(jìn),得到了具有良好過流保護(hù)特性的IGBT驅(qū)動電路。該電路簡單,可靠,易用,配合DSP等控制芯片能達(dá)到很好的驅(qū)動效果abstract:Based on the studies on the dynamic switching and over-current characteristics of IGBT,this paper makes some improvments to the original push-pull driving circuit,obtains a new IGBT driving circuit which has a good over-current protection function.The circuit is simple,reliable and easy to use.Combined with controlling chips such as DSP it will do a great job in driving applications.關(guān)鍵詞:IBGT:開關(guān)特性;驅(qū)動;過流保護(hù);Key Words:IGBT;switching characteristics;driving:over-current protection

    標(biāo)簽: 分立元件 igbt 驅(qū)動電路

    上傳時間: 2022-06-21

    上傳用戶:

  • 利用Filter Solutions輔助設(shè)計(jì)濾波器.

    【摘要】介紹一種濾波器輔助設(shè)計(jì)軟件Filter Solutions,利用其設(shè)計(jì)一款常用的帶通濾波器,并將仿真曲線與實(shí)測結(jié)果進(jìn)行比較。【關(guān)鍵詞】Filter Solutions;濾波器;輔助設(shè)計(jì)Use Filter Solutions aid filter design abstract:Introduce a software-Filter Solutions,which aid to design filter.Use it to digign a common band pass filter,then compare the result ofreslstemeasweothe simuetur,I1.Com Key words:Filter Solutions;filter;aid design1引言廣義上的濾波器深入到我們生活中的每一個角落,人眼對圖像的反應(yīng)符合低通濾波器的特征,人耳對聲音的反應(yīng)則符合帶通濾波器的特征。隨著近年來電子工業(yè)的飛速發(fā)展,濾波器已成為電子技術(shù)應(yīng)用中不可缺少的基礎(chǔ)器件之一,尤其廣泛地應(yīng)用于通信領(lǐng)域。能快捷而準(zhǔn)確地設(shè)計(jì)出預(yù)期特性的濾波器已成為所有電子工程師越來越強(qiáng)烈的需要。

    標(biāo)簽: 濾波器 輔助設(shè)計(jì)

    上傳時間: 2022-06-25

    上傳用戶:

  • 基于μc/os-ⅲ的freemodbus通信協(xié)議的實(shí)現(xiàn)

    摘要:介紹了以FreeModbus協(xié)議找在嵌入式搶占實(shí)時操作系統(tǒng)μC/OS-l的STM32平臺上,成功實(shí)現(xiàn)了Modbus協(xié)議的移植。通過詳細(xì)分析FreeModbus協(xié)議花并編寫STM32F103VET6微處理器的底層驅(qū)動,成功實(shí)現(xiàn)了工業(yè)Modbus協(xié)議RTU和ASCll兩種模式的通信功能。測試結(jié)果表明,在實(shí)際工業(yè)生產(chǎn)控制和儀表開發(fā)中,應(yīng)用Freemodbus協(xié)議,完全符合工業(yè)數(shù)據(jù)采集、實(shí)時控制和數(shù)據(jù)處理等廠級重復(fù)性和精確度要求,在一定程度上降低了工業(yè)儀表開發(fā)的周期及成本。關(guān)鍵詞:實(shí)時操作系統(tǒng),uC/OS-ll,F(xiàn)reeModbus,Modbus協(xié)議,STM32abstract:This paper introduces FreeModbus stack transplanted to the STM32 platform which has been embedded in the preemptive real-time operating system uC/OS-ll,in order that the transplantation of the Modbus protocol is successfuly im-plemented.The FreeModbus stack is analyzed in detail and STM32F103VET6 microprocessor underlying driver is writed,so that the two Modbus industrial communication function RTU and ASCll are successfully realized.Keywords:time operating system,uC/OS-ll,.FreeModbus,Modbus協(xié)議,STM32

    標(biāo)簽: freemodbus 通信協(xié)議

    上傳時間: 2022-06-25

    上傳用戶:

  • 基于ICL8038等構(gòu)成的函數(shù)發(fā)生器電路

    摘要:本系統(tǒng)以ICL8038集成塊為核心器件,制作一種函數(shù)信號發(fā)生器,制作成本較低。適合學(xué)生學(xué)習(xí)電子技術(shù)測量使用。ICL8038是一種具有多種波形輸出的精密振蕩集成電路,只需要個別的外部元件就能產(chǎn)生從0.001Hz~30KlHz的低失真正弦波、三角波、矩形波等脈沖信號。輸出波形的頻率和占空比還可以由電流或電阻控制。另外由于該芯片具有調(diào)制信號輸入端,所以可以用來對低頻信號進(jìn)行頻率調(diào)制。關(guān)鍵詞:函數(shù)信號發(fā)生器頻率調(diào)制abstract:The system ICL8038 integrated block as the core device,producing a kind of function signal generator,producing low cost.Suitable for students to learn the use of electronic technology measurement.ICL8038 is a kind of multi-precision oscillator waveform output integrated circuits,a separate external components only need to be able to generate from the 0.001Hz ~30KHz low-distortion sine wave,triangle wave,square wave pulse signal,etc..Output waveform of the frequency and duty cycle can also be controlled by a currentor resistance.In addition,as the chip has a modulated signal input terminal,it can be used to low-frequency signal is frequency modulation.

    標(biāo)簽: icl8038 函數(shù)發(fā)生器 電路

    上傳時間: 2022-07-04

    上傳用戶:zhanglei193

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