电容器的作用是什么?
电容器在电路中的效果:在直流电路中,电容器是相当于断路的。电容器是一种可以储藏电荷的元件,也是常用的电子元件之一。
电容器,一般简称其包容电荷的本领为电容,用字母C表明。定义1:电容器,望文生义,是装电的容器,是一种包容电荷的器件。英文名称:capacitor。
电容器是电子设备中很多运用的电子元件之一,广泛应用于电路中的隔直通交,耦合,旁路,滤波,调谐回路,能量转换,控制等方面。定义2:电容器,任何两个相互绝缘且相隔很近的导体(包含导线)间都构成一个电容器。
电容与电容器不同。电容为根本物理量,符号C,单位为F(法拉)。
通用公式C=Q/U平行板电容器专用公式:板间电场强度E=U/d,电容器电容决定式C=εS/4πkd。
跟着电子信息技术的日新月异,数码电子产品的更新换代速度越来越快,以平板电视(LCD和PDP)、笔记本电脑、数码相机等产品为主的消费类电子产品产销量持续增长,带动了电容器产业增长。
使充电后的电容器失去电荷(开释电荷和电能)的进程称为放电。例如,用一根导线把电容器的两极接通,两极上的电荷相互中和,电容器就会放出电荷和电能。
放电后电容器的两极板之间的电场消失,电能转化为其它形式的能。在一般的电子电路中,常用电容器来完成旁路、耦合、滤波、振荡、相移以及波形变换等,这些效果都是其充电和放电功用的演变。
这得从电容器的结构上说起。简略的电容器是由两头的极板和中心的绝缘电介质(包含空气)构成的。通电后,极板带电,构成电压(电势差),可是由于中心的绝缘物质,所以整个电容器是不导电的。
不过,这样的情况是在没有超过电容器的临界电压(击穿电压)的前提条件下的。我们知道,任何物质都是相对绝缘的,当物质两头的电压加大到必定程度后,物质是都可以导电的,我们称这个电压叫击穿电压。
电容也不例外,电容被击穿后,就不是绝缘体了。不过在中学阶段,这样的电压在电路中是见不到的,所以都是在击穿电压以下工作的,可以被当做绝缘体看。可是,在沟通电路中,由于电流的方向是随时刻成必定的函数关系改变的。
而电容器充放电的进程是有时刻的,这个时分,在极板间构成改变的电场,而这个电场也是随时刻改变的函数。实际上,电流是经过场的形式在电容器间经过的。
在中学阶段,有句话,就叫通沟通,阻直流,说的便是电容的这个性质。
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型号- 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锂离子电容器的应用方向介绍
锂离子电容器兼顾了高比功率和高比能量,具有快速充电和长寿命特性,代表厂家电容器技术发展的前沿。随着超级电容器技术和产业的成熟发展,不断催生出更为广阔的应用市场空间。本文介绍超级电容器的主要应用市场有哪些。
应用方案 发布时间 : 2024-05-29
【产品】超级电容器HP-2R7-J105VYJ82,采用圆柱形电容器外形,额定电压为2.7V
凯美能源的超级电容器HP-2R7-J105VYJ82的直径为4mm,长度为25.5mm,采用圆柱形电容器外形,内部为卷绕式结构。产品的额定电压为2.7V,工作温度是-40℃-70℃,适用于后备电源、储能、大电流工作和大功率支持。
产品 发布时间 : 2023-03-01
【选型】导电高分子型钽电容器,电容量最高可达330μF,ESR最低仅35mΩ
ROHM(罗姆)株式会社是全球最知名的半导体厂商之一,创立于1958年,总部位于日本京都市。“品质第一“是罗姆的一贯方针,其产品涉及多个领域,其导电性高分子电容器产品线包括新背面电极结构(超大容量)型的TCSO系列、底面电极构造(大容量)型TCTO系列、标准构造TCO系列。该类型电容器属于钽电容器的一种,具有较低的ESR,安全可靠,且尺寸小、电容量大,可用于智能电话、PC、数码相机/摄像机等。
器件选型 发布时间 : 2018-11-03
科尼盛电容纳入联想105W氮化镓充电器,具备2C1A接口赋能快充!
科尼盛电容纳入联想105W氮化镓充电器,具备2C1A接口赋能快充,单USB-C口支持100W输出,能够满足笔记本电脑和手机快充需求。三个接口均支持快充,同时还支持自动功率分配,65W+30+10W分配更加满足实际使用。
原厂动态 发布时间 : 2023-10-13
KNSCHA AM极低阻抗贴片电解电容器、AM贴片电解电容器和固态电解电容器区别
KNSCHA(科尼盛)AM极低阻抗贴片电解电容器 AM贴片电解电容器和固态电解电容器区别贴片型铝电解电容和固态电容是两种常见的电子元件,它们在结构和特性上有一些区别。贴片型铝电解电容适用于一般电子设备中,而固态电容则适用于对稳定性要求较高、尺寸要求较小的场合,如手机、笔记本电脑等。在选择时,需要根据具体的应用需求和性能要求来进行选择。
原厂动态 发布时间 : 2023-11-01
【产品】额定放电容量200F的电容器MK-5.4V-P200FDS,工作温度-40℃至70℃
凯美能源推出的MK-5.4V-P200FDS是基于双电层电容器原理,内部采用活性炭作为正负电极,两极间用电解液与隔膜隔开,铝外壳与橡胶塞进行密封,引出极在产品同侧。超级电容模组由多只单体经串并联组成,并在内部配备均压控制管理电路。
产品 发布时间 : 2023-05-17
电子商城
现货市场
服务
整体外形尺寸小至0.6*0.3*0.3mm (DFN0603),工作电压范围覆盖2.5V~36V,电容值低至0.2pF,浪涌能力最高可达240安培,静电等级可达空气放电、接触放电±30KV。提供免费浪涌测试仪、静电测试仪测试。
提交需求>
可定制电线特性阻抗50-80Ω,静电容量54-110pF/m,减衰量0.5-0.7db/m以下,芯对数和截面积、尺寸长度;支持B超电线、内窥镜电线、血液分析仪电线、医疗USB电线、病床设备电线定制。
最小起订量: 1000m 提交需求>
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