声学楼论坛技术交流区基础理论室 → Power handling and heat dissipation


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主题:Power handling and heat dissipation

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klming
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  发帖心情 Post By:2008-11-27 22:21:32 [只看该作者]

       Very  good!

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松香味
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  发帖心情 Post By:2008-11-29 9:27:35 [只看该作者]

以下是引用一个老兵在2007-06-30 23:29:40的发言:

好题目,然而这儿偏好中文哪.欢迎.

Good topic, but it prefers Chinese here

as there are Chinese engineers here. Most of them could not handel English very well,

I am afraid.

Any way, welcome.

[此贴子已经被作者于2007-07-12 19:57:24编辑过]

是啊!这里大多数更习惯使用中文交流。


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松香味
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  发帖心情 Post By:2008-11-29 9:45:36 [只看该作者]

磁性体液的冷却性能和作用是非常好的,但是对大振幅长冲程的扬声器单元常常不适用。体会被很快渍射流失,不知道楼主对这些问题有什么看法,是怎么解决的?

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松香味
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  发帖心情 Post By:2008-11-29 10:10:19 [只看该作者]

我想,粘滞系数较高,是体被很快渍射流失的重要原因之一;粘滞阻尼可降低失真也降低了扬声器的灵敏度;是不是这样呢?

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wsf912
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  发帖心情 Post By:2009-1-6 17:33:26 [只看该作者]

Mr.Klippel has a very good point on this issue.

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wsf912
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  发帖心情 Post By:2009-1-6 17:35:09 [只看该作者]

I think this is a very good start that we chinese acoustics engineers communicate in English.

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一个老兵
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  发帖心情 Post By:2009-1-6 23:25:46 [只看该作者]

以下是引用一个老兵在2007-07-12 20:18:07的发言:

As far as I know, the chief engineer Mr.Dong of DongYuan company went to AES conferences  a fewtimes,

once I read his article about ways to deal heat trasfering. I guess they did a lot in their car drivers. Mr. Dong handle English very well. Maybe you can take time to meet him as he is in Shenzhen now.

The evervictory company is in Dongguan. They made a lot of drivers. If you visit their company you shall find some interesting stuff. Engineers there are very hardworking, maybe they need more indtructions more even they have done a lot. The company is not small with some sales persons who can speak English.

Of course, there are other companies, you shall be interested too.

I can offer some information if you need.


上面有个英文词打错了.

indtructions 应该是 instructions.

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WANGFUYU
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  发帖心情 Post By:2009-1-8 11:51:19 [只看该作者]

 

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WANGFUYU
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  发帖心情 Post By:2009-1-8 11:55:43 [只看该作者]

The latest thermal model of loudspeaker heating was presented by Mr.  Klippel  . The equivalent circuit is attached.  Besides conventional heat conduction and radiation ,we should pay more attention to air convenction cooling around the heated coil   because this forced convection plays a very important role in  taking the heat away ,especially for woofer and subwoofer.


图片点击可在新窗口打开查看此主题相关图片如下:5201.gif
图片点击可在新窗口打开查看
[此贴子已经被作者于2009-01-08 12:14:33编辑过]

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wsf912
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  发帖心情 Post By:2009-1-8 15:01:51 [只看该作者]

Could all the paremeters in the thermal eletrical equivelant circuit be measured by Klippel measurement system?
It was mentioned  in one of Dr.Klippel's pappers that a sealed pole in the T yoke can help air convention to put away the heat from the voice coil rather than a vent pole.But I think it is questionable,because I found it went the oposite in some practices.

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WANGFUYU
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  发帖心情 Post By:2009-1-8 17:13:08 [只看该作者]

我已经做过几次试验,堵住T铁孔可以降低音圈温度和提高功率承受力,请30楼自己试验一下。
Per  experiments by myself ,I have known that sealed vent in the pole of T-yoke does help in reducing V.C. temperature and improve the power handling . Please do that by yourself and then you can believe it.

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wsf912
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  发帖心情 Post By:2009-1-9 13:22:48 [只看该作者]

Thanks Mr.Wang. When I first saw Dr.Klippel's thermal equivelant circuit,I was really imppressed.I wonder if the paremeters can be measured by klippel system on sale presently,it would go more easier in power handling control.

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