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KRECO publicly listed company stock code 891359 power supply manufacturer

KRECO invention patents vertical integration custom power supply solutions

KRECO IEC 60601-1 medical grade power supply certified quality

KRECO 24 hours service line support power adapter OEM ODM

KRECO expert Billy power supply consultant OEM ODM quote

KRECO vertical integration supply chain risk buffer power adapter manufacturing

KRECO medical power supply low leakage current IEC 60601 ECG equipment

KRECO global compliance power adapter certifications UL CE TUV CCC

KRECO total cost ownership TCO power adapter quality vs price

KRECO Global Sources Hong Kong exhibition booth 11V06 power supply live demo

公司新闻

标题

时间

什么是数字电源？

2019-01-17

电源适配器和充电器的区别

2019-01-07

三种方法教你如何使用手机无线充电器

2018-12-26

千人盛会：2018（冬季）中国USB PD快充产业高峰论坛

2018-12-26

2018-12-25

2018-12-25

2018-12-14

2018-12-12

2018-12-11

2018-11-28

2018-11-21

2018-11-19

2018-11-13

国产机器人如何加速发展?专家建言:加快产业智能化布局

2018-10-31

使用劣质电源会带来什么后果？

2018-10-28

充电器开关电源电源适配器三者区别

2018-10-24

2018年电源适配器行业的的发展趋势是什么

2018-10-12

2018-09-30

2018-09-25

2018-09-19

2018-09-05

2018-08-27

2018-08-15

2018-08-13

美国CPSC召回过热无线充电器，只因未通过这项认证

2018-08-13

充电器中的Y电容的作用是什么

2018-07-12

使用电源适配器注意事项

2018-07-10

<p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">一、电源适配器(以下简称电源)的标称电压和电流是什么意思?首先，一般电源标称的电压，是指开路输出的电压，也就是外面不接任何负载，没有电流输出时候的电压，所以也可以理解为，此电压就是电源输出电压的上限。<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">对于电源内部使用了主动稳压的<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">元件<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">的情况下，即使<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">市电<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">电压有所波动，其输出也是恒定值，像市面上一般的小变压器，比如随身听之类配的电源，如果市电波动，该电源的输出也不会随之波动的。 <o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><img alt="" src="/inc/uploads/ckeditor/SAM_3876.jpg" style="height: 400px; width: 400px;" />一般来讲普通电源适配器的真正<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">空载电压<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">也不一定和标称电压完全一致，因为电子元件的特性不可能完全一致，所以有一定的误差，误差越小，对电子元件的一致性要求越高，生产的成本就高了，所以价格也就贵一些了。<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">另外，关于标称的电流值，无论任何电源都有一定的内阻，因此当电源输出电流的时候，会在内部产生压降，导致两件事情，一个是产生热量，所以电源会热，另一个是导致输出电压降低，相当于内部消耗。<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">二、都是同样标称电压的电源，输出电流不同，能不能用在同一台本本上?<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">电源电压一样，输出电流不同，能不能用在同一台本本上。基本的原则是大标称电流的电源可以代替小标称电流的电源。估计有人会这样想，觉得大标称电流的电源会烧坏本本，因为电流大了嘛。实际上电流多大在电压相同的情况下取决于负载，呵呵，想<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">想初中的物理就知道了。当本本高负荷运转的时候，电流大些，本本进入待机的时候，电流就小些，大标称电流的电源有足够的电流余量。反之，有人用56w的电源代替72w的用起来也没什么问题，原因是通常电源适配器的设计留有一定的余量，负载功率都要小于电源功率，所以这种代替在一般使用上是可行的，但是剩余的电源功率余量就很少了，一旦你的本本接了很多外设，比如两块usb硬盘，然后cpu全速运转，再有一个底座，上面来个光驱全速读盘，再加上同时给电池充电，估计就危险了，要随时用手摸摸你的电源是不是已经可以煮鸡蛋了。所以最好不要用<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">小电流<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">电源代替大电流电源。<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">三、一模一样的机器，别人的电源温温的，我的总是很烫，为什么?<o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">先不要怀疑你的电源有问题，先看看你的本本在干什么，是不是像上面说的两块USB硬盘，CPU全速运转，硬盘疯狂读写，光驱全速读盘，同时给电池充电，大声放着音乐，<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">屏幕最亮<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">最大，无线网卡一直在侦测信号等等，善用电源管理，根据任务合理调整本本的工作状态是很重要的。 四、电源标称电压比我的本本电池电压高很多，不会出事吧? <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">首先，要知道的是，电源给本本供电与电池给本本供电是不同的。 <img alt="" src="/inc/uploads/ckeditor/KRE-SAW70_1.jpg" style="width: 400px; height: 400px;" /><o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><o:p></o:p> <p class="p" style="margin: 0pt 0pt 11.25pt; text-indent: 21pt; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> <span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">电池供电，电池的输出是纯直流，干净得很，电池的电压既不可能也不需要设计得很高，锂电池的化学特性决定了一节<span style="font-family: 宋体; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">电芯<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">的输出电压只能在3.6V左右，所以很多电池都是采用三级串联的方式，10.8V也就成了很流行的电池电压。有些电池的标称值比3.6V的整数倍稍大一些，比如3.7V或者11.2V等等，其实是为了保护电池。<span style="font-family: Arial; color: rgb(51, 51, 51); letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><o:p></o:p> Penny 2018-07-15 声明：本文来自个人，KRECO公司拥有最终解释权！