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.
上传时间: 2013-10-19
上传用户:bakdesec
当前,太阳能光伏市场(包括光伏模块和逆变器)正以每年约30%的年累积速 度增长。太阳能逆变器的作用是将随太阳能辐射及光照变化的DC 电压转换成为 电网兼容的AC 输出;而对于广大电子工程师而言,太阳能逆变器是一个值得高 度关注的技术领域。因此下文将介绍太阳能逆变器设计所需注意的技术要点、挑 战以及相应的解决方法。 基本设计标准 基于太阳能逆变器的专用性以及保持设计的高效率,它需要持续监视太阳能 电池板阵列的电压和电流,从而了解太阳能电池板阵列的瞬时输出功率。它还需 要一个电流控制的反馈环,用于确保太阳能电池板阵列工作在最大输出功率点, 以应付多变的高输入。目前,太阳能逆变器已有多种拓扑结构,最常见的是用于 单相的半桥、全桥和Heric(Sunways 专利)逆变器,以及用于三相的六脉冲桥和 中点钳位(NPC)逆变器;图1 所示是这些逆变器的拓扑图(Microsemi 图源)。 同时,设计还需遵从安全规范,并在电网发生故障的时候可以快速断开与电网的 连接。因此,太阳能逆变器的基本设计标准包括额定电压、容量、效率、电池能 效、输出AC 电源质量、最大功率点跟踪(MPPT)效能、通信特性和安全性
标签: 太阳能逆变器
上传时间: 2014-12-24
上传用户:三人用菜
为解决直流逆变交流的问题,有效地利用能源,让电源输出最大功率,设计了高性能的基于IR2101最大功率跟踪逆变器,并以SPMC75F2413A单片机作为主控制器。高电压、高速功率的MOSFET或IGBT驱动器IR2101采用高度集成的电平转换技术,同时上管采用外部自举电容上电,能够稳定高效地驱动MOS管。该逆变器可以实现DC/AC的转换,最大功率点的跟踪等功能。实际测试结果表明,该逆变器系统具有跟踪能力强,稳定性高,反应灵敏等特点,该逆变器不仅可应用于普通的电源逆变系统,而且可应用于光伏并网发电的逆变系统,具有广泛的市场前景。 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
上传时间: 2013-11-17
上传用户: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.
标签: Wide-input modules offer dc
上传时间: 2014-12-24
上传用户:dragonhaixm
QA03是专为需要两组隔离电源的IGBT驱动器而设计的DC-DC模块电源。其内部采用了两路独立输出后共接模式,可以更好的为IGBT的开通与关断提供能量。同时具有输出短路保护及自恢复能力。
上传时间: 2013-11-21
上传用户:极客
•用于对SIMATICS7-400的供电•用于将AC或DC网络电压转换为所需的5V DC和24VDC工作电压•输出电流为4A,10A和20A
上传时间: 2014-04-30
上传用户:1037540470
QA02是专为需要两组隔离电源的IGBT驱动器而设计的DC-DC模块电源。其内部采用了两路独立输出后共接模式,可以更好的为IGBT的开通与关断提供能量。同时具有输出短路保护及自恢复能力。
上传时间: 2014-01-11
上传用户:blans
AC通用输入(100~240V AC)全球对应型电源1
上传时间: 2014-04-15
上传用户:u789u789u789
源自Elgar品牌的交流电源,顶尖的技术与经验的累积使其具有优异的性能,成为业界领先的交流电源。广泛应用于从民用到国防,通讯业到汽车业,过程控制、航空航天、军工、大学与研究所等。
标签: 程控电源
上传时间: 2013-10-18
上传用户:fairy0212
说明:单排直插(SIP)封装或双排直插DIP(封装),任意值电压输入转换出任意值电压输出,精度为±2%或±3%.简说:DC/DC定电压隔离双隔离(输入/输出隔离、两路输出之间也隔离,双输出,两路正压或两路负压及或一正一负)转换器,输出共同一地线,瞬变响应快,极低纹波噪声输出,无需任何外围元件即可工作,脚位采用7PIN单列,14PIN双列直插,小型封装。应用:便携仪表,医学仪表,自控装置,防盗报警器,手持仪表,通讯设备等数字电路。
上传时间: 2013-10-31
上传用户:qq527891923