用戶:Tomchiukc/磁損耗

磁損耗是磁學的術語，指當

定義磁性材料在磁化過程和反磁化過程中有一部分能量不可逆地轉變為熱，所損耗的能量稱

其特徵在於由 交流電流支付的工作，使用時，作為鐵心的克服阻力，這表明，通過調節磁特性的變化時勵磁電流的磁化電流。

磁損耗可能由磁滯或渦電流引起。

鐵芯損耗 / Core loss

In a transformer or inductor, some of the power that would ideally be transferred through the device is lost in the core, resulting in heat and sometimes noise. There are various reasons for such losses, the primary ones being:

在一個變壓器或電感，一些可以通過設備轉移的力量，會在鐵磁芯流失，造成熱能或有時噪聲。這些損耗主要是有多種原因引起：

磁滯損耗 / Hysteresis loss

When the magnetic field through the core changes, the magnetization of the core material changes by expansion and contraction of the tiny magnetic domains it is composed of, due to movement of the domain walls. This process causes losses, because the domain walls get "snagged" on defects in the crystal structure and then "snap" past them, dissipating energy as heat. This is called hysteresis loss. It can be seen in the graph of the B field versus the H field for the material, which has the form of a closed loop. The amount of energy lost in the material in one cycle of the applied field is proportional to the area inside the hysteresis loop. Hysteresis loss increases with higher frequencies as more cycles are undergone per unit time.

當磁場通過核心的變化，磁化的核心材料的膨脹和收縮的變化的微小磁疇這樣構成的，由於運動的疇壁。此過程會導致損失，因為疇壁「陷入僵局」在晶體結構中的缺陷，然後選擇「捕捉」他們過去，作為熱量耗散能量。這就是所謂的磁滯損耗。的曲線圖中可以看出，在「B」與「H」字段為材料，其形式為一個閉環的字段。在一個週期內的應用領域中的材料損失的能量的量成比例的內部區域磁滯回線。具有較高的磁滯損耗增加頻率，作為每單位時間經過更多的週期。

渦電流損耗 / Eddy current loss

The induction of eddy currents within the core causes a resistive loss. The higher the resistance of the core material the lower the loss. Lamination of the core material can reduce eddy current loss, as can making the core of a nonconductive magnetic material, like ferrite.

電磁感應引起的渦電流，Ş內芯會導致電阻損耗。越高電阻所述芯材的損耗越低。 層壓的核心材料，可以減少渦電流損失，可以使非導電的磁性材料製成的核心，如[[鐵素體（磁性體芯）|鐵氧體]。