dielectric loss

简明释义

介质损失

英英释义

例句

1.To improve efficiency, we need to minimize dielectric loss (介质损耗) in our designs.

为了提高效率，我们需要在设计中最小化dielectric loss（介质损耗）。

2.Testing for dielectric loss (介质损耗) is crucial in ensuring the reliability of electrical components.

测试dielectric loss（介质损耗）对于确保电气组件的可靠性至关重要。

3.The dielectric loss (介质损耗) in insulators can lead to energy wastage in electrical systems.

绝缘体中的dielectric loss（介质损耗）可能导致电力系统中的能量浪费。

4.The high temperature in the capacitor is often a result of increased dielectric loss (介质损耗).

电容器中的高温通常是由于增加的dielectric loss（介质损耗）所致。

5.Engineers must consider dielectric loss (介质损耗) when selecting materials for high-frequency applications.

工程师在选择高频应用材料时，必须考虑dielectric loss（介质损耗）。

作文

Understanding the concept of dielectric loss is crucial for students and professionals in the fields of electrical engineering and materials science. Dielectric loss refers to the energy dissipation that occurs when an alternating electric field is applied to a dielectric material. This phenomenon is particularly significant in capacitors, insulators, and other electronic components where dielectric materials are utilized. The understanding of dielectric loss can lead to improved designs and efficiency in various applications.To grasp the implications of dielectric loss, we first need to comprehend what a dielectric material is. Dielectrics are insulating materials that do not conduct electricity but can support an electric field. When an electric field is applied, these materials become polarized, which means that their positive and negative charges shift slightly in response to the field. However, this polarization is not instantaneous; it takes time for the charges to realign when the field changes direction, especially in an alternating current (AC) scenario.This delay in polarization leads to energy being lost in the form of heat, which is what we refer to as dielectric loss. The loss is characterized by the loss tangent, a parameter that quantifies the inefficiency of the dielectric material. A higher loss tangent indicates greater energy loss, which can be detrimental in high-frequency applications where efficiency is paramount.In practical terms, if we consider a capacitor, the dielectric loss affects its performance. Capacitors are designed to store energy, and any energy lost as heat due to dielectric loss reduces their overall efficiency. This is particularly critical in power electronics, where capacitors are subjected to high-frequency signals. Engineers must select dielectrics with low dielectric loss to ensure that the components operate efficiently and do not overheat.Moreover, the temperature dependence of dielectric loss is another important factor. As the temperature increases, the molecular motion within the dielectric material also increases, which can lead to higher levels of dielectric loss. This means that materials that perform well at room temperature may not necessarily perform well at elevated temperatures. Therefore, it is essential for engineers to consider the operating environment when selecting materials for specific applications.Additionally, different types of dielectric materials exhibit varying levels of dielectric loss. For instance, ceramics typically have lower dielectric loss compared to polymers. This difference in performance can influence the choice of materials in the design of electronic devices. Understanding the properties of these materials and their dielectric loss characteristics can significantly impact the longevity and reliability of electronic components.In conclusion, recognizing the significance of dielectric loss is vital for anyone involved in the design and application of electronic systems. It not only affects the efficiency of components like capacitors but also influences the selection of materials used in various applications. By minimizing dielectric loss, engineers can enhance the performance and durability of electronic devices, leading to more reliable and efficient technologies in our increasingly electronic world. Thus, a thorough understanding of dielectric loss is essential for advancing technology and improving energy efficiency in electronic systems.

理解介质损耗的概念对于电气工程和材料科学领域的学生和专业人士至关重要。介质损耗是指当交变电场施加到介质材料上时发生的能量耗散现象。这一现象在电容器、绝缘体和其他利用介质材料的电子元件中尤其重要。对介质损耗的理解可以导致各种应用中设计和效率的提高。首先，我们需要理解什么是介质材料，以便掌握介质损耗的影响。介质是绝缘材料，不导电，但可以支持电场。当施加电场时，这些材料会发生极化，这意味着它们的正负电荷会稍微偏移以响应电场。然而，这种极化并不是瞬时的；当电场方向改变时，电荷重新排列需要时间，尤其是在交流电（AC）情况下。这种极化的延迟导致能量以热量的形式损失，这就是我们所称的介质损耗。损耗由损耗正切表示，这是一个量化介质材料低效的参数。较高的损耗正切表示更大的能量损失，这在高频应用中可能是有害的，因为效率至关重要。从实际角度来看，如果我们考虑电容器，介质损耗会影响其性能。电容器被设计用于存储能量，而由于介质损耗而损失的任何能量都会降低其整体效率。这在电力电子学中尤为关键，因为电容器会受到高频信号的影响。工程师必须选择具有低介质损耗的介质，以确保组件高效运行且不会过热。此外，介质损耗的温度依赖性也是一个重要因素。随着温度的升高，介质材料内部的分子运动也增加，这可能导致更高水平的介质损耗。这意味着在室温下表现良好的材料在高温下可能表现不佳。因此，工程师在为特定应用选择材料时，考虑操作环境是至关重要的。此外，不同类型的介质材料表现出不同水平的介质损耗。例如，陶瓷通常比聚合物具有更低的介质损耗。这种性能差异可能会影响电子设备设计中材料的选择。理解这些材料的特性及其介质损耗特征可以显著影响电子组件的耐用性和可靠性。总之，认识到介质损耗的重要性对于任何参与电子系统设计和应用的人来说都是至关重要的。它不仅影响电容器等组件的效率，还影响各种应用中材料的选择。通过最小化介质损耗，工程师可以提高电子设备的性能和耐用性，从而在我们日益电子化的世界中实现更可靠和高效的技术。因此，深入理解介质损耗对于推动技术进步和提高电子系统的能源效率至关重要。