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  • 燃料燃烧计算程序 Fuel Combustion Computing Software 欢迎你使用本软件

    燃料燃烧计算程序 Fuel Combustion Computing Software 欢迎你使用本软件,本软件主要对燃料(包括固体、气体、液体)进行燃烧计算!

    标签: Combustion Computing Software Fuel

    上传时间: 2015-05-12

    上传用户:三人用菜

  • Widely known as carputer, this system is designed for: * calculating speed, Fuel consumption, ec

    Widely known as carputer, this system is designed for: * calculating speed, Fuel consumption, economy driving, e.t.c. * displaying information about temperatures and controll Air Conditioning system in your car.* * controlling other devices, like electrically opened windows.* The system is based on ATMega MCU programmed in C language.

    标签: calculating consumption carputer designed

    上传时间: 2016-05-29

    上传用户:lili123

  • Fuel+Cell+Micro-grids

    The solid high-polymer-film-type Fuel cell (PEM-FC) system is used as the power supply equipment for transportation and replaces an internal combustion engine. A reduction of the environmental load is expected through the cogeneration system’s (CGS) use of the PEM-FC system as a distributed power supply to individual houses, apartments, and so forth [1–3]. The growing use of distributed power systems, such as Fuel cells, the reduction of power-transmission losses, and an increase of waste heat recovery are expected. Therefore, the reduction of carbon- dioxide emission is also expected as compared to conventional energy supply methods using commercial electric power. 

    标签: Micro-grids Fuel Cell

    上传时间: 2020-06-07

    上传用户:shancjb

  • 电力电子变换器DSP控制电路设计及其EMC研究.rar

    本论文主要对燃料电池用DC/AC变换器的主电路拓扑、脉宽调制(PWM)方式、控制系统硬件电路、控制策略以及电磁兼容(EMC)问题进行了研究。考虑到燃料电池(Fuel Cell)的特性和DC/AC变换器的应用场合,本文主要对单相DC/AC变换器做了研究。 首先,针对单相DC/AC变换器,分析了它们的主电路拓扑结构、工作原理以及脉宽调制方式。 其次,完成了DSP控制系统的软硬件设计。DC/AC变换器的控制系统硬件电路,主要包括DSP最小系统、电源系统、信号检测与调理电路、CAN通信以及SCI串口通信电路等。变换器控制策略则采用电压环控制,瞬时值电压以及有效值电压控制都采用PI调节,并且阐述了如何通过DSP实现PWM脉冲。 另外本文还研究了DC/AC变换器控制电路板的电磁兼容(EMC)问题。针对一些电磁干扰(EMI)问题,提出了相应的抑制措施。主要研究了开关电源EMI滤波器的设计方法。 最后,经过相关试验,给出了结论,也提出了今后需要进一步研究的方向。

    标签: DSP EMC 电力电子

    上传时间: 2013-05-17

    上传用户:nunnzhy

  • 电动汽车用DCDC变换器主电路拓扑结构及电磁干扰的研究.rar

    本论文主要针对燃料电池电动轿车FCEV(Fuel Cell Electrical Vehicle)用DC/DC变换器主电路拓扑结构及电磁干扰产生与抑制问题进行研究.针对燃料电池偏软的输出特性和电动汽车对DC/DC变换器的体积小、重量轻和效率高的要求,本论文分析比较了带变压器的隔离式直流变换器和非隔离式直流变换器的主要优点和缺点,指出隔离式变换电路不适合于FCEV用DC/DC变换器主电路,非隔离式降压(Buck)电路是最佳的主电路方案.在此基础上,分析了非隔离式降压(Buck)电路的工作原理和特点,运用模拟仿真软件PSPICE仿真分析了Buck主电路参数,并在分析比较了各种磁性材料特性的基础上对电感器进行了优化设计.本论文深入讨论了DC/DC变换器中构成电磁干扰的三个主要因素:电磁干扰源、传播途径和敏感设备.分析了DC/DC变换器主电路中存在的主要干扰源及干扰产生的机理以及干扰传播途径,在此基础上,重点讨论了抑制各种干扰的方法及措施(包括传导干扰抑制与辐射干扰抑制等),并给出了具体方案.本论文还从电磁兼容(EMC)测试的目的、组成等方面出发,对整个EMC测试进行了详细的分析,提出了基于汽车电子EMC测试标准的DC/DC变换器EMC测试大纲,并对其中的试验项目、试验仪器、试验场地、试验设置、所应达到的等级进行了详细的分析和介绍.

    标签: DCDC 电动汽车 变换器

    上传时间: 2013-08-03

    上传用户:20160811

  • 车用DCDC变换器主电路及其电磁兼容性研究.rar

    近年来,随着汽车工业的迅速发展,环境污染、全球变暖、能源短缺的压力使传统的内燃机汽车面临前所未有的挑战,燃料电池电动汽车已成为汽车工业新的热点。由于燃料电池输出特性的特殊性,输出端必须连接DC/DC变换器,使之与驱动器配合。因此,DC/DC变换器是燃料电池电动汽车的关键零部件之一。 本论文主要对燃料电池电动轿车FCEV(Fuel Cell Electric Vehicle)用DC/DC变换器的主电路拓扑结构、参数设计及电磁兼容(EMC)问题进行了研究。重点针对升降压和双向DC/DC变换器进行分析研究。 首先介绍分析了几种传统升降压直流变换器的工作原理和优缺点。针对燃料电池的特性和电动汽车对升降压DC/DC变换器的性能指标要求,分析比较了非隔离式直流变换器的一些优点和缺点,提出了Buck-Boost级联的升降压主电路方案并提出相关的控制策略。然后运用模拟仿真软件MATLAB仿真分析了控制策略的正确性。 其次分析研究了双向DC/DC变换器的应用与设计,综合比较现有的各种隔离与非隔离方案,结合车用要求,选择了非隔离式的Buck-Boost拓扑。针对其工作原理、特点进行了双向DC/DC变换器主电路与控制电路的设计研究,重点研究其过渡过程的控制策略。在利用MATLAB进行各种过渡过程的仿真分析的基础上,选取了最佳的过渡控制方案。并利用该控制策略编制DSP控制程序,制作了小功率1kW数字控制双向DC/DC变换器。 最后深入讨论了DC/DC变换器中的电磁兼容问题。分析了DC/DC变换器主电路中存在的主要干扰源、干扰产生的机理以及干扰传播途径,然后以此出发,重点讨论了各种抑制电磁骚扰(EMI)和电磁抗干扰(EMS)的方法及措施,给出具体方案。

    标签: DCDC 车用 变换器

    上传时间: 2013-05-24

    上传用户:hanli8870

  • 错误观念妨碍电量计在无线手机中的应用

    Abstract: Most hand-held products lack accurate battery-charge monitors ("Fuel gauges") because of the misconception that an accurate Fuel gauge is difficult to achieve. This article debunks the myths and discusses how to accurately monitor charge at all temperatures, charge and discharge rates, and aging conditions. 无线通信和数据在新一代手机和PDA中的融合为再一次的生产力飞跃创造了条件。。随之而来的将是经济的增长和全新的工作方式,在便携式计算机领域,PC笔记本曾经扮演了类似的开拓者角角。

    标签: 错误 电量计 无线 手机

    上传时间: 2013-10-17

    上传用户:erkuizhang

  • 错误观念妨碍电量计在无线手机中的应用

    Abstract: Most hand-held products lack accurate battery-charge monitors ("Fuel gauges") because of the misconception that an accurate Fuel gauge is difficult to achieve. This article debunks the myths and discusses how to accurately monitor charge at all temperatures, charge and discharge rates, and aging conditions.

    标签: 错误 电量计 无线 手机

    上传时间: 2014-03-18

    上传用户:wenwiang

  • This submission includes the presentation and model files that were used in delivering a webinar on

    This submission includes the presentation and model files that were used in delivering a webinar on 12-15-05 that covered the topic of modeling Hybrid Electric Vehicles. Hybrid electric vehicles (HEVs) have proven they can substantially improve Fuel economy and reduce emissions. Because HEVs combine an electric drive with the internal combustion engine (ICE) in the powertrain, the vehicle?s kinetic energy can be captured during braking and transformed into electrical energy in the battery. The dual power source also means that the ICE can be reduced in size and can operate at its most efficient speeds.

    标签: presentation submission delivering includes

    上传时间: 2015-12-24

    上传用户:zl5712176

  • 螺旋桨PID控制 In response to constant pressure to design more efficient, faster, smaller, and better sys

    螺旋桨PID控制 In response to constant pressure to design more efficient, faster, smaller, and better systems, engineers are constantly looking for ways to improve existing designs or replace them with better ones. Facing large Fuel costs, the aerospace industry in particular has been researching alternative designs to increase Fuel efficiency and performance. One such alternative is the development of reconfigurable aircraft wings. These wings would be able to adapt to the current environment increasing lift or reducing drag when appropriate.

    标签: efficient response constant pressure

    上传时间: 2016-11-22

    上传用户:trepb001