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很有意思的问题——“变压器加直流分量会叫?”,用谷歌找了一,意外地有些发现:
有一家做配件的荷兰公司网站上http://www.kempelektroniks.nl/PO ... l?language=_L2#/231,有一段关于直流与变压器哼声的文字“DC-offset is always present on the mains, although not always to a great extent. The smallest amount however, creates a restlessness in your sound and vision. Direct Current on the mains is caused by asymmetrical loads, for example a hairdryer at half power. Also printers, photo copiers and espresso-machines are known for their DC-generating properties. It causes cores in audio-power transformers to saturate, causing them to hum. Another point is, that DC will limit the ability of transformers to deliver large peak-currents undistorted. When peak currents are drawn, distortion will rise to an unacceptable level.
”谷歌直接的翻译结果是“直流偏移永远是目前的电源,虽然并不总是在很大的程度。最小的一笔然而,建立在你的声音和视觉的一种冲动。直流电源是由不对称负荷,例如在半功率的吹风机。打印机,复印机和咖啡机也被称为他们的直流发电机的性能。它会导致音频电源变压器磁芯饱和,使他们哼唱。另一点是,DC,将限制变压器能够提供很大的峰值,电流不失真。当绘制的峰值电流,失真将上升到不可接受的程度。”大致可以协助楼主为广大烧友做个科普扫盲。
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