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time-frequency

  • G3-PLC技術(shù)使電動汽車智能化充電

    Abstract: This article explores criteria necessary for reliable communication between electric vehicles (EVs) and electric vehicleservice equipment (EVSE). Data will demonstrate that a G3-PLC system has already met the criteria established by the automotiveand utility industries. Multiple international tests prove that a G3-PLC implementation is the optimal low-frequency solution.

    標簽: PLC 電動汽車 智能化 充電

    上傳時間: 2014-12-24

    上傳用戶:逗逗666

  • 基于RTW的三電平雙PWM變換器控制系統(tǒng)設(shè)計

    此提出了一種基于Matlab/Simulink及實時代碼生成工具R哪(Real.Time Workshop)的電力電子與電力傳動控制系統(tǒng)軟件的設(shè)計方法。首先在Simulink下搭建控制系統(tǒng)模型,進行相應(yīng)仿真完善,驗證控制算法,根據(jù)目標DSP型號添加相應(yīng)DSP內(nèi)核、外設(shè)并設(shè)置控制參數(shù),然后直接將模型轉(zhuǎn)化為相應(yīng)DSP的C源代碼.在相應(yīng)的硬件平臺支持下即可完成相關(guān)實驗。

    標簽: RTW PWM 三電平 變換器控制

    上傳時間: 2013-11-04

    上傳用戶:wincoder

  • DN387 級聯(lián)7A點的負載單片降壓轉(zhuǎn)換器

      Easy-to-use and compact point-of-load power suppliesare necessary in systems with widely distributed, highcurrent, low voltage loads. The LTC®3415 provides acompact, simple and versatile solution. It includes a pairof integrated complementary power MOSFETs (32mΩtop and 25mΩ bottom) and requires no external senseresistor. A complete design requires an inductor andinput/output capacitors, and that’s it. The result is a fast,constant frequency, 7A current mode DC/DC switchingregulator.

    標簽: 387 DN 級聯(lián) 負載

    上傳時間: 2013-10-18

    上傳用戶:avensy

  • DN1014同步降壓型控制器在汽車應(yīng)用中的電池壽命延長

      Battery powered applications that have a signifi cantamount of time in standby mode, require electrical circuitsto operate with a low quiescent current to preserve batterylife. The LTC3835 synchronous step-down controlleris an excellent solution with its ultralow quiescent current(80μA). Other features make it uniquely qualifi ed tosatisfy the needs of automotive applications. A wide 4Vto 36V input voltage range protects the supply againsthigh input voltage transients and is compatible with lowvoltage cold crank conditions. The constant frequencycurrent-mode architecture with high-side inductor current

    標簽: 1014 DN 同步降壓型 控制器

    上傳時間: 2013-11-20

    上傳用戶:stewart·

  • 具有寬輸入范圍的微型單片降壓型穩(wěn)壓器

      Automotive batteries, industrial power supplies, distributedsupplies and wall transformers are all sources ofwide-ranging high voltage inputs. The easiest way to stepdown these sources is with a high voltage monolithicstep-down regulator that can directly accept a wide inputrange and produce a well-regulated output. The LT®3493accepts inputs from 3.6V to 36V and LT3481 acceptsinputs from 3.6V to 34V. Both provide excellent lineand load regulation and dynamic response. The LT3481offers a high effi ciency solution over a wide load range andkeeps the output ripple low during Burst Mode® operationwhile the LT3493 provides a tiny solution with minimalexternal components. The LT3493 operates at 750kHzand the LT3481 has adjustable frequency from 300kHzto 2.8MHz. High frequency operation enables the use ofsmall, low cost inductors and ceramic capacitors.

    標簽: 輸入 降壓型穩(wěn)壓器

    上傳時間: 2014-12-24

    上傳用戶:Pzj

  • 多相DC/DC控制器精度和帶寬限制

      Speed and accuracy don’t always go hand-in-handin DC/DC converter systems—that is, until now. TheLTC3811 is a dual output, fi xed frequency current modeDC/DC switching regulator controller designed for one oftoday’s most demanding power supply applications: highcurrent, low voltage processor core supplies.

    標簽: DC 多相 控制器 帶寬

    上傳時間: 2013-11-21

    上傳用戶:aix008

  • DN428微型同步升壓轉(zhuǎn)換器

      Alkaline batteries are convenient because they’re easy tofi nd and relatively inexpensive, making them the powersource of choice for portable instruments and devicesused for outdoor recreation. Their long shelf life alsomakes them an excellent choice for emergency equipmentthat may see infrequent use but must be ready to go on amoment’s notice. It is important that the DC/DC convertersin portable devices operate over the widest possiblebattery voltage range to extend battery run time, and thussave the user from frequent battery replacement.

    標簽: 428 DN 同步升壓 轉(zhuǎn)換器

    上傳時間: 2014-12-24

    上傳用戶:569342831

  • DN465 超低功耗升壓轉(zhuǎn)換器

      Industrial remote monitoring systems and keep-alivecircuits spend most of their time in standby mode. Manyof these systems also depend on battery power, so powersupply effi ciency in standby state is very important tomaximize battery life. The LT®8410/-1 high effi ciencyboost converter is ideal for these systems, requiringonly 8.5μA of quiescent current in standby mode. Thedevice integrates high value (12.4M/0.4M) output feedbackresistors, signifi cantly reducing input current whenthe output is in regulation with no load. Other featuresinclude an integrated 40V switch and Schottky diode,output disconnect with current limit, built in soft-start,overvoltage protection and a wide input range, all in atiny 8-pin 2mm × 2mm DFN package.

    標簽: 465 DN 超低功耗 升壓轉(zhuǎn)換器

    上傳時間: 2013-11-23

    上傳用戶:新手無憂

  • DN460雙輸出降壓穩(wěn)壓器優(yōu)化效率

      The LTC3546 is a dual output current mode buck regulatorwith fl exible output current partitioning. Beyondthe advantages normally associated with dual outputregulators (reduced size, cost, EMI and part count, withimproved effi ciency), the LTC3546’s outputs can bepartitioned for either 3A and 1A outputs, or two 2A outputs.This increases its application range and simplifi esmultiple supply rail designs. A confi gurable Burst Mode®clamp for each output sets the current transition levelbetween Burst Mode operation and forced continuousconduction mode to optimize effi ciency over the entireoutput range. An adjustable switching frequency up to4MHz and internal power MOSFET switches allow forsmall and compact footprints.

    標簽: 460 DN 輸出 優(yōu)化效率

    上傳時間: 2013-11-04

    上傳用戶:yxgi5

  • LTC4099 USB電源管理和電池充電

      The LTC®4099 high effi ciency USB power manager andLi-Ion/Polymer battery charger seamlessly managespower distribution from multiple sources in portableapplications. It is differentiated from other USB powermanagers by its bidirectional I2C port that allows the hostmicroprocessor to control and monitor all aspects of theUSB power management and battery charging processes.In addition, a programmable interrupt generation functionalerts the host microprocessor to changes in device statusand provides unprecedented control of power managementfunctions. This high degree of confi gurability allowspost-layout changes in operation, even changes in thefi eld, and it allows a single qualifi ed device to be usedin a variety of products, thus reducing design time andeasing inventory management.

    標簽: 4099 LTC USB 電源管理

    上傳時間: 2013-10-22

    上傳用戶:18602424091

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