PLL(Phase Locked Loop): 為鎖相回路或鎖相環(huán),用來統(tǒng)一整合時鐘信號,使高頻器件正常工作,如內(nèi)存的存取資料等。PLL用于振蕩器中的反饋技術(shù)。 許多電子設(shè)備要正常工作,通常需要外部的輸入信號與內(nèi)部的振蕩信號同步。一般的晶振由于工藝與成本原因,做不到很高的頻率,而在需要高頻應(yīng)用時,由相應(yīng)的器件VCO,實現(xiàn)轉(zhuǎn)成高頻,但并不穩(wěn)定,故利用鎖相環(huán)路就可以實現(xiàn)穩(wěn)定且高頻的時鐘信號。
上傳時間: 2021-07-23
上傳用戶:紫陽帝尊
基于TMS320F2812 光伏并網(wǎng)發(fā)電模擬裝置PROTEL設(shè)計原理圖+PCB+軟件源碼+WORD論文文檔,硬件采用2層板設(shè)計,PROTEL99SE 設(shè)計的工程文件,包括完整的原理圖和PCB文件,可以做為你的學(xué)習(xí)設(shè)計參考。 摘要:本文實現(xiàn)了一個基于TMS320F2812 DSP芯片的光伏并網(wǎng)發(fā)電模擬裝置,采用直流穩(wěn)壓源和滑動變阻器來模擬光伏電池。通過TMS320F2812 DSP芯片ADC模塊實時采樣模擬電網(wǎng)電壓的正弦參考信號、光伏電池輸出電壓、負載電壓電流反饋信號等。經(jīng)過數(shù)據(jù)處理后,用PWM模塊產(chǎn)生實時的SPWM 波,控制MOSFET逆變?nèi)珮蜉敵稣也ā1疚挠肞I控制算法實現(xiàn)了輸出信號對給定模擬電網(wǎng)電壓的正弦參考信號的頻率和相位跟蹤,用恒定電壓法實現(xiàn)了光伏電池最大功率點跟蹤(MPPT),從而達到模擬并網(wǎng)的效果。另外本裝置還實現(xiàn)了光伏電池輸出欠壓、負載過流保護功能以及光伏電池輸出欠壓、過流保護自恢復(fù)功能、聲光報警功能、孤島效應(yīng)的檢測、保護與自恢復(fù)功能。系統(tǒng)測試結(jié)果表明本設(shè)計完全滿定設(shè)計要求。關(guān)鍵詞:光伏并網(wǎng),MPPT,DSP Photovoltaic Grid-connected generation simulator Zhangyuxin,Tantiancheng,Xiewuyang(College of Electrical Engineering, Chongqing University)Abstract: This paper presents a photovoltaic grid-connected generation simulator which is based on TMS320F2812 DSP, with a DC voltage source and a variable resistor to simulate the characteristic of photovoltaic cells. We use the internal AD converter to real-time sampling the referenced grid voltage signal, outputting voltage of photovoltaic, feedback outputting voltage and current signal. The PWM module generates SVPWM according to the calculation of the real-time sampling data, to control the full MOSFET inverter bridge output sine wave. We realized that the output voltage of the simulator can track the frequency and phase of the referenced grid voltage with PI regulation, and the maximum photovoltaic power tracking with constant voltage regulation, thereby achieved the purpose of grid-connected simulation. Additionally, this device has the over-voltage and over-current protection, audible and visual alarm, islanding detecting and protection, and it can recover automatically. The testing shows that our design is feasible.Keywords: Photovoltaic Grid-connected,MPPT,DSP 目錄引言 11. 方案論證 11.1. 總體介紹 11.2. 光伏電池模擬裝置 11.3. DC-AC逆變橋 11.4. MOSFET驅(qū)動電路方案 21.5. 逆變電路的變頻控制方案 22. 理論分析與計算 22.1. SPWM產(chǎn)生 22.1.1. 規(guī)則采樣法 22.1.2. SPWM 脈沖的計算公式 32.1.3. SPWM 脈沖計算公式中的參數(shù)計算 32.1.4. TMS320F2812 DSP控制器的事件管理單元 42.1.5. 軟件設(shè)計方法 62.2. MPPT的控制方法與參數(shù)計算 72.3. 同頻、同相的控制方法和參數(shù)計算 8
標簽: tms320f2812 光伏 并網(wǎng)發(fā)電 模擬 protel pcb
上傳時間: 2021-11-02
上傳用戶:
本書是 Marc Thompson 博士 20 年模擬電路設(shè)計和教學(xué)經(jīng)驗的總結(jié),講述了模擬電路與系統(tǒng)設(shè)計中常用的直觀分析方法。本書提出了“模擬電路直觀方法學(xué)”,力圖幫助學(xué)生和設(shè)計人員擺脫復(fù)雜的理論推導(dǎo)與計算,充分利用直觀知識來應(yīng)對模擬電路工程設(shè)計挑戰(zhàn)。全書共分為 16 章,內(nèi)容涵蓋了二極管、晶體管、放大器、濾波器、反饋系統(tǒng)等模擬電路的基本知識與設(shè)計方法。本書大綱第 1 章與第 2 章為介紹性材料。第 1 章是本書的引言,同時介紹了模擬電路設(shè)計的發(fā)展動機,其中引用了一些精選的歷史事件。第 2 章講述后續(xù)章節(jié)中用到地重要的信號處理概念,以使讀者們能夠跟上作者的思路。第 3 章至第 8 章講述雙極性器件的物理學(xué)原理、雙極性結(jié)型晶體管 (bipolar junction transistor, BJT) 、晶體管放大器,以及用于帶寬估計與開關(guān)速度分析的近似技術(shù)。第 9 章講述 CMOS 管和 CMOS 管放大器的基礎(chǔ)知識。前面章節(jié)介紹的用于放大器設(shè)計的帶寬估計技術(shù)也同樣適用于 CMOS 管器件。第 10 章講述 晶體管的開關(guān)效應(yīng)。晶體管是如何實現(xiàn)導(dǎo)通和關(guān)閉呢?又如何估計它的開關(guān)速度呢?第 11 章回顧反饋系統(tǒng) (feedback system) 的基本知識以及設(shè)計穩(wěn)定反饋系統(tǒng)的伯德圖 / 相位裕度方法 (Bod plot / phase margin) 。第 12 章和第 13 章講述實際運算放大器的設(shè)計、使用和限制,包括電壓反饋 (voltage-feedback) 以及電流反饋 (current-feedback) 放大器。第 14 章講述模擬低通濾波器設(shè)計的基本知識,包括巴特沃思 (Butterworth) 、切比雪夫 (Chebyshev) 、橢圓 (elliptic) 以及貝塞爾 (Bessel) 濾波器的無源梯形實現(xiàn)和胡源實現(xiàn)。第 15 章講述實際電路設(shè)計問題,比如 PCB 版圖設(shè)計規(guī)則、無源器件的使用和限制等。第 16 章是一些有用的設(shè)計技術(shù)和設(shè)計技巧的大雜燴,這些內(nèi)容又不適合放在其他章節(jié),所以作為獨立的章節(jié)進行講述。一些說明性的分析問題以及 MATLAB 和 SPICE 設(shè)計示例點綴在全書的字里行間,以幫助讀者理解本書的內(nèi)容。
標簽: 模擬電路
上傳時間: 2022-02-14
上傳用戶:
ADC模數(shù)轉(zhuǎn)換器件Altium Designer AD原理圖庫元件庫SV text has been written to file : 4.4 - ADC模數(shù)轉(zhuǎn)換器件.csvLibrary Component Count : 29Name Description----------------------------------------------------------------------------------------------------ADC0800 National 8-Bit Analog to Digital ConverterADC0809 ADC0831 ADCADC0832 ADC8 Generic 8-Bit A/D ConverterCLC532 High-Speed 2:1 Analog MultiplexerCS5511 National 16-Bit Analog to Digital ConverterDAC8 Generic 8-Bit D/A ConverterEL1501 Differential line Driver/ReceiverEL2082 Current-Mode MultiplierEL4083 Current Mode Four Quadrant MultiplierEL4089 DC Restored Video AmplifierEL4094 Video Gain Control/FaderEL4095 Video Gain Contol/Fader/MultiplexerICL7106 LMC6953_NSC PCI Local Bus Power SupervisorMAX4147 300MHz, Low-Power, High-Output-Current, Differential Line DriverMAX4158 350MHz 2-Channel Video Multiplexer-AmplifierMAX4159 350MHz 2-Channel Video Multiplexer-AmplifierMAX4258 250MHz, 2-Channel Video Multiplexer-AmplifierMAX4259 250MHz 2-Channel Video Multiplexer-AmplifierMAX951 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMAX952 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMC1496 Balanced Modulator/DemodulatorPLL100k Generic Phase Locked LoopPLL10k Generic Phase Locked LoopPLL5k Generic Phase Locked LoopPLLx Generic Phase Locked Loop水位計
標簽: adc 模數(shù)轉(zhuǎn)換 altium designer
上傳時間: 2022-03-13
上傳用戶:
本系統(tǒng)采用電動機電樞供電回路串接采樣電阻的方式來實現(xiàn)對小型直流有刷電動機的轉(zhuǎn)速測量。該系統(tǒng)主要由二階低通濾波電路,小信號放大電路、單片機測量顯示電路、開關(guān)穩(wěn)壓電源電路等組成。同時自制電機測速裝置,用高頻磁環(huán)作為載體,用線圈繞制磁環(huán),利用電磁感應(yīng)原理檢測電機運行時的漏磁,將變化的磁場信號轉(zhuǎn)化為磁環(huán)上的感應(yīng)電流。用信號處理單元電路將微弱電信號轉(zhuǎn)化為脈沖信號,送由單片機檢測,從而達到準確測量電機的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
標簽: 直流電動機
上傳時間: 2022-03-26
上傳用戶:
該步進電機驅(qū)動器又稱為EasyDriver,EasyDriver能夠為兩級步進電機提供大約每相750mA(兩極一共1.5A)的驅(qū)動。它默認設(shè)置為8步細分模式(所以如果你的電機是每圈200步,你使用EasyDriver時默認為每圈1600步),更多細分模式可以通過將MS1或MS2兩個接腳接地進行設(shè)置。這是一種基于Allegro A3967驅(qū)動芯片的細分斷路器。對于此設(shè)計的完整規(guī)格,請查閱A3967的參數(shù)表。它的最大每相電流從150mA到750mA。可以采用的最大驅(qū)動電壓大概是30V,其中包括板載5V的調(diào)壓器,所以只需要一個電源。質(zhì)優(yōu)價廉,這玩意兒只要十幾美元,比你自己制作電路板更便宜。步進電機驅(qū)動器設(shè)計特色:· A3967 Microstepping Driver· MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth)· Compatible with 4, 6, and 8 wire stepper motors of any voltage· Adjustable current control from 150mA/phase to 700mA/phase· Power supply range from 6V to 30V. The higher the voltage, the higher the torque at high speeds
上傳時間: 2022-04-27
上傳用戶:
為解決移相全橋電路驅(qū)動及相角控制問題,設(shè)計了一種數(shù)字控制的移相全橋驅(qū)動電路.以TPL521為光耦隔離、IR2110為柵極驅(qū)動芯片.由DSP產(chǎn)生PWM信號,經(jīng)過光耦隔離和邏輯電路后送至IR2110進行相角控制.文章對IR2110驅(qū)動電路原理進行分析及參數(shù)進行設(shè)計,對TMS320F28335進行設(shè)置并給出部分代碼.實驗結(jié)果表明:通過TMS320F28335可產(chǎn)生的不同相角的PWM波形,滿足了移相全橋?qū)Σ煌嘟强刂频囊?In order to solve the problem of phase-shifted full-bridge circuit driving and phase angle control,a digitally controlled phaseshifted full-bridge driving circuit was designed. TPL521 optocoupler isolation,IR2110 gate driver chip. PWM signals are generated by the DSP and sent to the IR2110 for phase angle control after optocoupler isolation and logic circuits. This text carries on the analysis to the principle of IR2110 drive circuit and parameter design,set up and give out some code to TMS320F28335. The experimental results show that the PWM waveforms with different phase angles generated by TMS320F28335 can meet the requirements of phase-shifted full-bridge control for different phase angles.
上傳時間: 2022-05-03
上傳用戶:zhanglei193
基于TMS320F28035芯片為控制核心的空間矢量異步電機變頻器 我們設(shè)計的異步電機變頻調(diào)速器以TMS320F28035芯片為控制核心,通過輸出三相PWM波控制智能功率模塊IPM驅(qū)動三相異步電機。我們使用空間矢量SVPWM算法,并對其進行了優(yōu)化。采用檢測反電勢的方法省去了昂貴的光電編碼器,大大節(jié)省了成本。同時開創(chuàng)性的研發(fā)了自動根據(jù)運行環(huán)境調(diào)節(jié)的自適應(yīng)變頻算法,使我們的變頻調(diào)速器可以在電網(wǎng)條件惡劣的鄉(xiāng)村山區(qū)工作,由此該變頻器已被一家民用水泵生產(chǎn)企業(yè)預(yù)訂。關(guān)鍵字 變頻器 TMS320f28035 IPM SVPWM In our design, the asynchronous machine inverter based on the chip of TMS320F28035 drives the three-Phase asynchronous machine by sending three-phase PWM waves to the IPM, which is short for the Intelligent-Power-Module. The SVPWM (space vector pulse width modulation) strategy is applied to our control algorithm and we optimize it mainly in two aspects. Firstly the inverter detects the speed by measuring the Back EMF instead of installing an expensive photoelectric encoder for costs reduction.
標簽: tms320f28035 芯片
上傳時間: 2022-05-08
上傳用戶:zhanglei193
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
上傳時間: 2022-06-18
上傳用戶:
三菱電機功率器件在工業(yè)、電氣化鐵道、辦公自動化、家電產(chǎn)品等多種領(lǐng)域的電力變換及電動機控制中得到廣泛應(yīng)用。為了真正滿足市場對裝置噪音低、效率高、體積小、重量輕、精度高、功能強、容量大的要求,三菱電機積極致力于新型器件的研究、開發(fā),為人類的節(jié)能和環(huán)保不斷努力。第5代IGBT和IPM模塊均采用三菱電機第5代IGBT硅片CSTBTIM技術(shù),并具有正溫度系數(shù)特征,與傳統(tǒng)的溝槽型構(gòu)造IGBT相比,降低了集電極一發(fā)射極間飽和電壓,從而實現(xiàn)了更低損耗。同時改進了封裝技術(shù),大大減小了模塊內(nèi)部分布電感。本應(yīng)用手冊的出版,旨在幫助用戶了解第5代IGBT和IPM模塊的特性和工作原理,更加方便的使用三菱電機的半導(dǎo)體產(chǎn)品。三菱電機謹向所有購買和支持三菱半導(dǎo)體產(chǎn)品的用戶表示誠摯的感謝。1.IGBT模塊的一般認識1.1 NF系列IGBT模塊的特點NF系列IGBT模塊主要具有以下兩大特點:1,采用第5代IGBT硅片在溝槽型IGBT的基礎(chǔ)上增加電荷蓄積層的新結(jié)構(gòu)(CSTBT)改善了關(guān)斷損耗(Eoff)和集電極-發(fā)射極問飽和電壓VEisat的折衷。插入式組合元胞(PCM)的使用增強了短路承受能力(SCSOA)并降低了柵極電容,從而降低驅(qū)動功率。CSTBT:Carrier Stored Trench-Gate Bipolar Transistor載流子存儲式溝槽硼型雙極晶體臂
標簽: igbt
上傳時間: 2022-06-19
上傳用戶:shjgzh
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