用户:Tomchiukc/磁损耗

磁损耗是磁学的术语，指当

定义磁性材料在磁化过程和反磁化过程中有一部分能量不可逆地转变为热，所损耗的能量称

其特征在于由 交流电流支付的工作，使用时，作为铁心的克服阻力，这表明，通过调节磁特性的变化时励磁电流的磁化电流。

磁损耗可能由磁滞或涡电流引起。

铁芯损耗 / 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:

在一个变压器或电感，一些可以通过设备转移的力量，会在铁磁芯流失，造成热能或有时噪声。这些损耗主要是有多种原因引起：

磁滞损耗 / 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.

当磁场通过核心的变化，磁化的核心材料的膨胀和收缩的变化的微小磁畴这样构成的，由于运动的畴壁。此过程会导致损失，因为畴壁“陷入僵局”在晶体结构中的缺陷，然后选择“捕捉”他们过去，作为热量耗散能量。这就是所谓的磁滞损耗。的曲线图中可以看出，在“B”与“H”字段为材料，其形式为一个闭环的字段。在一个周期内的应用领域中的材料损失的能量的量成比例的内部区域磁滞回线。具有较高的磁滞损耗增加频率，作为每单位时间经过更多的周期。

涡电流损耗 / 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.

电磁感应引起的涡电流，Ş内芯会导致电阻损耗。越高电阻所述芯材的损耗越低。 层压的核心材料，可以减少涡电流损失，可以使非导电的磁性材料制成的核心，如[[铁素体（磁性体芯）|铁氧体]。