大家好,大功率的开关电源散热方式采用水冷的,是否有人设计过?我有个疑问:
电源在空载工作时,热量比较少,如何解决空载工作时的冷凝水的问题!!
因为空载时,损耗比较小,散热器温度不太高,如果空气的温度高于散热器的温度,冷凝水是不可避免的.有这方面经验的高手指点指点.
大功率开关电源(20KW以上)散热方式选用水冷?
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@wricken
2万W的功率也不是很大的,就一般的风冷是可以解决的,我以前做过5万W的还是用的风冷,都还可以,不过水冷也是做过,后面的产品也都是水冷,至于凝水问题是很正常,可以加小风机吹.应该不是很大的问题吧,不过这些散热只能针对大电流的才行!
414741244612654.pdf
附件是散热片结构图纸,水冷铜管安装在铝散热片的导槽位置,接触部分使用导热材料粘接.
附件是散热片结构图纸,水冷铜管安装在铝散热片的导槽位置,接触部分使用导热材料粘接.
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@wuji122
水箱设计一般有两种,一种是直接使用铸铝来做一个水箱,进水口在下面,出水口在上面;第二种使用铜管和铝散热器的结构,铜管安装在铝散热器的中间,铜管主要负责水路的流动.这两种方式哪一种简单,成本低,可靠?请高手指点一下.铜管安装在铝散热器的夹层时,肯定会有缝隙,即便涂抹导热材料,感觉这种结构散热不是很好.铜管的安装方式类似这个图.[图片]500){this.resized=true;this.width=500;this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/78/414741245031671.gif');}"onmousewheel="returnimgzoom(this);">
在铝块上钻孔,两头安装气咀接口,非常方便
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@晶熔铁
水冷的对象是主变还是功率管?
水箱设计一般有两种,一种是直接使用铸铝来做一个水箱,进水口在下面,出水口在上面;第二种使用铜管和铝散热器的结构,铜管安装在铝散热器的中间,铜管主要负责水路的流动.这两种方式哪一种简单,成本低,可靠?请高手指点一下.
铜管安装在铝散热器的夹层时,肯定会有缝隙,即便涂抹导热材料,感觉这种结构散热不是很好.
铜管的安装方式类似这个图.
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/78/414741245031671.gif');}" onmousewheel="return imgzoom(this);">
铜管安装在铝散热器的夹层时,肯定会有缝隙,即便涂抹导热材料,感觉这种结构散热不是很好.
铜管的安装方式类似这个图.
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/78/414741245031671.gif');}" onmousewheel="return imgzoom(this);"> 0
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@mr.lan
在铝块上钻孔,两头安装气咀接口,非常方便
414741245648562.pdf
附件是SEMIKRON公司的水冷散热器结构(IGBT模块专用),感觉有一定的借鉴意义.资料里给出了水流量,以及散热器的热阻.共同看一下吧,老外设计的散热器很专业的.
414741245648732.pdf
附件是SEMIKRON公司的水冷散热器结构(IGBT模块专用),感觉有一定的借鉴意义.资料里给出了水流量,以及散热器的热阻.共同看一下吧,老外设计的散热器很专业的.
414741245648732.pdf
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@mr.lan
在铝块上钻孔,两头安装气咀接口,非常方便
关于设计水冷散热结构的注意事项:
Usage of Water Cooled Heat Sinks
For the usage of water cooled heat sinks we recommend to take care of the following points:
1 Always ensure to use the correct concentration of cooling liquid (for details see data sheets). In
case that the concentration of corrosion-inhibitors is too low, corrosion as consequential damage
may occur.
2 For high temperature differences between ambient air temperature and water cooler please
consider that there no condensate liquid damages the system.
3Please ensure that the cooling liquid is suitable for all metal parts in the cooling circuit (e.g. steel,
aluminum, other non-ferrous metals)
4 It should be used water, which has been de-ionized (e.g. chlorine ions can accelerate the
corrosion)
5 The water hardness shall be kept to a minimum, to avoid scale. Please note that scale increase
the thermal resistance.
6 The O2 content has to be kept to a minimum by a closed cooling circuit to avoid corrosion.
Usage of Water Cooled Heat Sinks
For the usage of water cooled heat sinks we recommend to take care of the following points:
1 Always ensure to use the correct concentration of cooling liquid (for details see data sheets). In
case that the concentration of corrosion-inhibitors is too low, corrosion as consequential damage
may occur.
2 For high temperature differences between ambient air temperature and water cooler please
consider that there no condensate liquid damages the system.
3Please ensure that the cooling liquid is suitable for all metal parts in the cooling circuit (e.g. steel,
aluminum, other non-ferrous metals)
4 It should be used water, which has been de-ionized (e.g. chlorine ions can accelerate the
corrosion)
5 The water hardness shall be kept to a minimum, to avoid scale. Please note that scale increase
the thermal resistance.
6 The O2 content has to be kept to a minimum by a closed cooling circuit to avoid corrosion.
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