For many years prior to the 1970s, engineers designed and built switch mode power supplies (SMPSs) using methods based largely on intuitive and exper- imentally derived techniques. In general, these power supplies were able to achieve their primary goal of high-efficiency power conversion; unfortu- nately, due to the lack of adequate theoretical analysis techniques, many of these power supplies only marginally met their desired performance require- ments. In many cases, they were considered to be unreliable.
標(biāo)簽： Supplies Switch Power Mode
上傳時間： 2020-06-07
上傳用戶：shancjb
Thepredecessorvolumeofthisbookwaspublishedin1996.Intheyears since then, some things have changed and some have not. Two of the things that have not changed are the desire for better models and faster simulations. I performed the original simulations on my “hyperfast” 133-MHz computer! At the time, I thought if I could just getafastercomputer,allofourSPICEproblemswouldbehistory,right? TodayIamsimulatingonacomputerthathasa2.6-GHzprocessorwith 512 MB of RAM, and I would still say that simulations run too slow. The computer technology has evolved, but so have the models. In 1996 wewereperformingsimulationson100-kHzpowerconverters,whereas today I routinely see 1- and 2-MHz power converters.
標(biāo)簽： Switch-Mode Simulation Supply Power
上傳時間： 2020-06-07
上傳用戶：shancjb
Switch-Mode Power Supply
標(biāo)簽： Switch-Mode Supply Power
上傳時間： 2020-06-07
上傳用戶：shancjb
stract With global drivers such as better energy consumption, energy efficiency and reduction of greenhouse gases, CO 2 emission reduction has become key in every layer of the value chain. Power Electronics has definitely a role to play in these thrilling challenges. From converters down to compound semiconductors, innovation is leading to breakthrough technologies. Wide BandGap, Power Module Packaging, growth of Electric Vehicle market will game change the overall power electronic industry and supply chain. In this presentation we will review power electronics trends, from technologies to markets.
標(biāo)簽： Electronics Materials Power WBG for
上傳時間： 2020-06-07
上傳用戶：shancjb
I am presenting this novel book on advances and trends in power electronics and motor drives to the professional community with the expectation that it will be given the same wide and enthusiastic acceptance by practicing engineers, R&D professionals, univer- sity professors, and even graduate students that my other books in this area have. Unlike the traditional books available in the area of power electronics, this book has a unique presentation format that makes it convenient for group presentations that use Microsoft’s PowerPoint software. In fact, a disk is included that has a PowerPoint file on it that is ready for presentation with the core figures. Presentations can also be organized using just selected portions of the book
標(biāo)簽： Electronics Advances Drives Power Motor And
上傳時間： 2020-06-10
上傳用戶：shancjb
n recent years, there have been many books published on power system optimization. Most of these books do not cover applications of artifi cial intelligence based methods. Moreover, with the recent increase of artifi cial intelligence applications in various fi elds, it is becoming a new trend in solving optimization problems in engineering in general due to its advantages of being simple and effi cient in tackling complex problems. For this reason, the application of artifi cial intelligence in power systems has attracted the interest of many researchers around the world during the last two decades. This book is a result of our effort to provide information on the latest applications of artifi cial intelligence to optimization problems in power systems before and after deregulation.
標(biāo)簽： Intelligence Artificial System Power in
上傳時間： 2020-06-10
上傳用戶：shancjb
RC吸收電路設(shè)計(jì)MOSFET吸收電路設(shè)計(jì)
上傳時間： 2021-10-16
上傳用戶：
基于TMS320F2812 光伏并網(wǎng)發(fā)電模擬裝置PROTEL設(shè)計(jì)原理圖+PCB+軟件源碼+WORD論文文檔,硬件采用2層板設(shè)計(jì)，PROTEL99SE 設(shè)計(jì)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(jì)參考。 摘要：本文實(shí)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(shí)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(fù)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(shí)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(shí)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(shí)現(xiàn)了光伏電池最大功率點(diǎn)跟蹤（MPPT），從而達(dá)到模擬并網(wǎng)的效果。另外本裝置還實(shí)現(xiàn)了光伏電池輸出欠壓、負(fù)載過流保護(hù)功能以及光伏電池輸出欠壓、過流保護(hù)自恢復(fù)功能、聲光報(bào)警功能、孤島效應(yīng)的檢測、保護(hù)與自恢復(fù)功能。系統(tǒng)測試結(jié)果表明本設(shè)計(jì)完全滿定設(shè)計(jì)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(jì)算 22.1. SPWM產(chǎn)生 22.1.1. 規(guī)則采樣法 22.1.2. SPWM 脈沖的計(jì)算公式 32.1.3. SPWM 脈沖計(jì)算公式中的參數(shù)計(jì)算 32.1.4. TMS320F2812 DSP控制器的事件管理單元 42.1.5. 軟件設(shè)計(jì)方法 62.2. MPPT的控制方法與參數(shù)計(jì)算 72.3. 同頻、同相的控制方法和參數(shù)計(jì)算 8
標(biāo)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：
Wide 2.2V to 6V Input Voltage Range ? 0.20V FB adjustable LED drive current ? Directly drive 9 Series 1W LED at VIN>=6V ? Fixed 800KHz Switching Frequency ? Max. 3A Switching Current Capability ? Up to 92% efficiency ? Excellent line and load regulation ? EN PIN TTL shutdown capability ? Internal Optimize Power MOSFET
標(biāo)簽： sc3633
上傳時間： 2021-11-05
上傳用戶：d1997wayne
ROHM最近推出了SiCMOSFET的新系列產(chǎn)品“SCT3xxxxR系列”。SCT3xxxxR系列采用最新的溝槽柵極結(jié)構(gòu)，進(jìn)一步降低了導(dǎo)通電阻；同時通過采用單獨(dú)設(shè)置柵極驅(qū)動器用源極引腳的4引腳封裝，改善了開關(guān)特性，使開關(guān)損耗可以降低35%左右。此次，針對SiCMOSFET采用4引腳封裝的原因及其效果等議題，我們采訪了ROHM株式會社的應(yīng)用工程師。關(guān)于SiCMOSFET的SCT3xxxxR系列，除了導(dǎo)通電阻很低，還通過采用4引腳封裝使開關(guān)損耗降低了35%，對此我們非常感興趣。此次，想請您以4引腳封裝為重點(diǎn)介紹一下該產(chǎn)品。首先，請您大致講一下4引腳封裝具體是怎樣的封裝，采用這種封裝的背景和目的是什么。首先，采用4引腳封裝是為了改善SiCMOSFET的開關(guān)損耗。包括SiCMOSFET在內(nèi)的電源開關(guān)用MOSFET和IGBT，被作為開關(guān)元件廣泛應(yīng)用于各種電源應(yīng)用和電源線路中。必須盡可能地降低這種開關(guān)元件產(chǎn)生的開關(guān)損耗和傳導(dǎo)損耗，但不同的應(yīng)用，其降低損耗的方法也不盡相同。作為其中的一種手法，近年來發(fā)布了一種4引腳的新型封裝，即在MOSFET的源極、漏極、柵極三個引腳之外，另外設(shè)置了驅(qū)動器源極引腳。此次的SCT3xxxxR系列，旨在通過采用最新的溝槽柵極結(jié)構(gòu)，實(shí)現(xiàn)更低的導(dǎo)通電阻和傳導(dǎo)損耗；通過采用4引腳封裝，進(jìn)一步發(fā)揮出SiC本身具有的高速開關(guān)性能，并降低開關(guān)損耗。那么，我想詳細(xì)了解一下剛剛您的概述中出現(xiàn)的幾個要點(diǎn)。首先，什么是“驅(qū)動器源極引腳”？驅(qū)動器源極引腳是應(yīng)用了開爾文連接原理的源極引腳。開爾文連接是通過電阻測量中的4個引腳或四線檢測方式，在電流路徑基礎(chǔ)上加上兩條測量電壓的線路，以極力消除微小電阻測量或大電流條件下測量時不可忽略的線纜電阻和接觸電阻的影響的方法，是一種廣為人知的方法。這種4引腳封裝僅限源極，通過使連接?xùn)艠O驅(qū)動電路返回線的源極電壓引腳與流過大電流的電源源極引腳獨(dú)立，來消除ID對柵極驅(qū)動電路的影響。
上傳時間： 2021-11-07
上傳用戶：
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