[翻译]看到一个英国产隔离牛的宣传资料，请懂行的人前来指教

the_fool

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这几天在研究搞日版100v电压的机器，所以在看隔离牛，这个英国的隔离牛品牌叫做airlink transformers，好像在英国的hifi论坛上评价不错，翻译过来请懂行的人评价一下是否靠谱。（很多专业术语不懂，可能翻译的比较瞎）

What is a Balanced Power Supply?平衡电源是神马？

Isolation transformers are very effective in filtering out mains-borne interference.
隔离牛能很有效的过滤掉电源干扰。
By using a large isolation transformer, a low impedance, floating output of 230V is produced. Care has to be taken with earthing as there is a chance of high voltages appearing between isolated & non-isolated equipment.
通过使用大型的隔离牛，可以制造出低阻抗的，浮动的230V电压输出。在接地方面需要特别注意，因为在隔离的电器与非隔离的电器之间可能有高电压差。

A balanced power supply goes one stage further.

平衡电源更进一步。

At the heart of an Airlink Transformers balanced power supply there is a large toroidal isolating transformer with an earthed centre-tapped secondary.

Airlink隔离牛的核心是一个大的环形隔离变压器，中心抽头副圈接地。

The transformer core is run at reduced flux density & is impregnated with varnish to reduce mechanical buzz.

变压器芯在更低的磁通密度下运行，同时刷了清漆来减少mechanical buzz（查不到这个是啥术语）。

Inrush current & overload protection are provided.

同时也具有防浪涌和防过载保护功能。

This balanced configuration produces a 230V output voltage consisting of a symmetrical pair of 115V out-of-phase voltages, i.e. the two ‘live’ wires are inversely phased, centre-tapped to earth.
这种平衡配置组成了由一对对称的反相115V输出电压组成的230V电压输出，也就是说，两条线都是火线，但是两条线的相位是反的，中心抽头接地。

Any (common-mode) reactive currents are likewise inversely phased. At the central earth point these equal & opposite currents meet and cancel each other out, they are not superimposed on the earth. This is known as common-mode rejection.
同理，共模无功电流也是反相的。在中央的接地点，等值反相的电流相互抵消，不会叠加到地面。这叫做共模抑制。（专业术语都是有道查来的，可能有误）

Airlink Transformers also produce a range of conditioning balanced power supplies.

Airlink也做滤波平衡电源。

These power supplies have an additional high quality EMI/RFI filter on the mains input to provide an even cleaner balanced output.

在电源输入端附加了高品质的EMI/RFI滤波器，以提供更加干净的平衡输出。

以上。
reference: http://www.airlinktransformers.c ... ly/technical-notes/

请懂的人帮忙分析一下。看起来很有趣，如果这么做的话，好像无需考虑火线和零线是否接反了，正反已经么意义了。

天瑜

用隔离牛，插头的正反，不明显。

the_fool

唔，仔细一搜发现这个其实是很老的概念了。