The LTM4601 DC/DC μModule regulator is a completehigh power density stepdown regulator for up to 12Acontinuous (14A peak) loads. The device is housed ina small 15mm ¥ 15mm ¥ 2.8mm LGA surface mountpackage, thus the large power dissipation is a challengein some applications. This thermal application note willprovide guidelines for using the μModule regulator inambient environments with or without air fl ow. Loadcurrent derating curves are provided for several inputvoltages and output voltages versus ambient temperatureand air fl ow.
上傳時間: 2013-10-19
上傳用戶:bakdesec
當(dāng)前,太陽能光伏市場(包括光伏模塊和逆變器)正以每年約30%的年累積速 度增長。太陽能逆變器的作用是將隨太陽能輻射及光照變化的DC 電壓轉(zhuǎn)換成為 電網(wǎng)兼容的AC 輸出;而對于廣大電子工程師而言,太陽能逆變器是一個值得高 度關(guān)注的技術(shù)領(lǐng)域。因此下文將介紹太陽能逆變器設(shè)計所需注意的技術(shù)要點、挑 戰(zhàn)以及相應(yīng)的解決方法。 基本設(shè)計標(biāo)準(zhǔn) 基于太陽能逆變器的專用性以及保持設(shè)計的高效率,它需要持續(xù)監(jiān)視太陽能 電池板陣列的電壓和電流,從而了解太陽能電池板陣列的瞬時輸出功率。它還需 要一個電流控制的反饋環(huán),用于確保太陽能電池板陣列工作在最大輸出功率點, 以應(yīng)付多變的高輸入。目前,太陽能逆變器已有多種拓?fù)浣Y(jié)構(gòu),最常見的是用于 單相的半橋、全橋和Heric(Sunways 專利)逆變器,以及用于三相的六脈沖橋和 中點鉗位(NPC)逆變器;圖1 所示是這些逆變器的拓?fù)鋱D(Microsemi 圖源)。 同時,設(shè)計還需遵從安全規(guī)范,并在電網(wǎng)發(fā)生故障的時候可以快速斷開與電網(wǎng)的 連接。因此,太陽能逆變器的基本設(shè)計標(biāo)準(zhǔn)包括額定電壓、容量、效率、電池能 效、輸出AC 電源質(zhì)量、最大功率點跟蹤(MPPT)效能、通信特性和安全性
標(biāo)簽: 太陽能逆變器
上傳時間: 2014-12-24
上傳用戶:三人用菜
為解決直流逆變交流的問題,有效地利用能源,讓電源輸出最大功率,設(shè)計了高性能的基于IR2101最大功率跟蹤逆變器,并以SPMC75F2413A單片機(jī)作為主控制器。高電壓、高速功率的MOSFET或IGBT驅(qū)動器IR2101采用高度集成的電平轉(zhuǎn)換技術(shù),同時上管采用外部自舉電容上電,能夠穩(wěn)定高效地驅(qū)動MOS管。該逆變器可以實現(xiàn)DC/AC的轉(zhuǎn)換,最大功率點的跟蹤等功能。實際測試結(jié)果表明,該逆變器系統(tǒng)具有跟蹤能力強(qiáng),穩(wěn)定性高,反應(yīng)靈敏等特點,該逆變器不僅可應(yīng)用于普通的電源逆變系統(tǒng),而且可應(yīng)用于光伏并網(wǎng)發(fā)電的逆變系統(tǒng),具有廣泛的市場前景。 Abstract: To solve the problem of DC-AC inverter, and to utilize solar energy more efficiently, the design of maximum power point tracking inverter based on IR2101 was achieved with a high-performance, which can make the system output power maximum. SPMC75F2413A was adopted as main controller. IR2101 is a high voltage, high speed power MOSFET and IGBT driver. It adopted highly integrated voltage level transforming technology, and an external bootstrap capacitor was used, which could drive MOS tube efficiently and stably. Many functions are achieved in the system, such as DC/AC conversion, maximun power point tracking, etc. The actual test result shows that the inverter system has characteristics of strong tracking ability, high stability and reacting quickly. The design can not only be used in ordinary power inverter system, but also be used in photovoltaic power inverter system. The design has certain marketing prospects
上傳時間: 2013-11-17
上傳用戶:lliuhhui
When a system designer specifies a nonisolated dc/dc powermodule, considering the needed input voltage range isequally as important as considering the required performanceattributes and features. Generally, nonisolated moduleshave either a narrow or a wide input voltage range. Narrowinputmodules typically have a nominal input voltage of3.3, 5, or 12 V. For systems that operate from a tightlyregulated input bus—such as those that do not use batterybackup—a narrow-input module is often adequate sincethe input remains fairly stable.Offering greater flexibility, wide-input modules operatewithin a range of 7 to 36 V, which includes the popular12- or 24-V industrial bus. This enables a single module tobe used for generating multiple voltages. These modulesare ideal for industrial controls, HVAC systems, vehicles,medical instrumentation, and other applications that usea loosely regulated distribution bus. In addition, systemspowered by a rectifier/battery charger with lead-acidbattery backup almost always require wide-input modules.System designers who choose power supplies may wantto take a close look at the latest generation of wide-inputdc/dc modules.
標(biāo)簽: Wide-input modules offer dc
上傳時間: 2014-12-24
上傳用戶:dragonhaixm
QA03是專為需要兩組隔離電源的IGBT驅(qū)動器而設(shè)計的DC-DC模塊電源。其內(nèi)部采用了兩路獨立輸出后共接模式,可以更好的為IGBT的開通與關(guān)斷提供能量。同時具有輸出短路保護(hù)及自恢復(fù)能力。
上傳時間: 2013-11-21
上傳用戶:極客
•用于對SIMATICS7-400的供電•用于將AC或DC網(wǎng)絡(luò)電壓轉(zhuǎn)換為所需的5V DC和24VDC工作電壓•輸出電流為4A,10A和20A
上傳時間: 2014-04-30
上傳用戶:1037540470
QA02是專為需要兩組隔離電源的IGBT驅(qū)動器而設(shè)計的DC-DC模塊電源。其內(nèi)部采用了兩路獨立輸出后共接模式,可以更好的為IGBT的開通與關(guān)斷提供能量。同時具有輸出短路保護(hù)及自恢復(fù)能力。
上傳時間: 2014-01-11
上傳用戶:blans
AC通用輸入(100~240V AC)全球?qū)?yīng)型電源1
上傳時間: 2014-04-15
上傳用戶:u789u789u789
源自Elgar品牌的交流電源,頂尖的技術(shù)與經(jīng)驗的累積使其具有優(yōu)異的性能,成為業(yè)界領(lǐng)先的交流電源。廣泛應(yīng)用于從民用到國防,通訊業(yè)到汽車業(yè),過程控制、航空航天、軍工、大學(xué)與研究所等。
標(biāo)簽: 程控電源
上傳時間: 2013-10-18
上傳用戶:fairy0212
說明:單排直插(SIP)封裝或雙排直插DIP(封裝),任意值電壓輸入轉(zhuǎn)換出任意值電壓輸出,精度為±2%或±3%.簡說:DC/DC定電壓隔離雙隔離(輸入/輸出隔離、兩路輸出之間也隔離,雙輸出,兩路正壓或兩路負(fù)壓及或一正一負(fù))轉(zhuǎn)換器,輸出共同一地線,瞬變響應(yīng)快,極低紋波噪聲輸出,無需任何外圍元件即可工作,腳位采用7PIN單列,14PIN雙列直插,小型封裝。應(yīng)用:便攜儀表,醫(yī)學(xué)儀表,自控裝置,防盜報警器,手持儀表,通訊設(shè)備等數(shù)字電路。
標(biāo)簽: DC-DC 模塊 電源應(yīng)用
上傳時間: 2013-10-31
上傳用戶:qq527891923
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