alternating current

简明释义

1. 交变电流; 2. 交流电; 3. 反复潮流; 4. 交流;

英英释义

例句

1.Electric motors typically operate on alternating current (交流电), making them efficient for various appliances.

电动机通常使用交流电，使其在各种电器中高效运行。

2.In electronics, alternating current (交流电) is often converted to direct current for use in batteries.

在电子学中，交流电常常被转换为直流电以供电池使用。

3.Transformers are used to change the voltage of alternating current (交流电) for transmission over long distances.

变压器用于改变交流电的电压，以便于长距离传输。

4.The frequency of alternating current (交流电) in the United States is 60 Hz.

美国的交流电频率为60赫兹。

5.The power supply in most homes uses alternating current (交流电) to provide electricity.

大多数家庭的电源使用交流电来提供电力。

作文

The invention of electricity has transformed the world in unimaginable ways. One of the key developments in this field is the concept of alternating current, or 交流电, which has become the standard for power transmission and distribution across the globe. Understanding alternating current is essential for anyone interested in electrical engineering, physics, or even everyday applications of electricity.To grasp the significance of alternating current, we first need to differentiate it from direct current (DC). Direct current is the type of electricity that flows in a single direction, like the power supplied by batteries. In contrast, alternating current periodically reverses direction, which allows it to travel longer distances with less energy loss. This characteristic makes alternating current particularly suitable for high-voltage power lines that transport electricity from power plants to homes and businesses.The history of alternating current dates back to the late 19th century when innovators like Nikola Tesla and George Westinghouse championed its use. They recognized that alternating current could be transformed easily into different voltages using transformers, making it more versatile than direct current. This ability to change voltage levels efficiently is one of the main reasons why alternating current became the dominant form of electricity distribution.One of the most significant advantages of alternating current is its efficiency in transmitting electricity over long distances. When electricity travels through wires, it encounters resistance, which leads to energy losses in the form of heat. However, by increasing the voltage of alternating current, these losses can be minimized. This is why power stations generate electricity at high voltages before it is stepped down to safer levels for consumer use.Moreover, alternating current is also integral to the operation of many household appliances. Most devices, such as refrigerators, air conditioners, and washing machines, are designed to operate on alternating current. The motors in these appliances rely on the alternating nature of the current to function efficiently. For example, an electric motor powered by alternating current can easily change its direction of rotation, allowing for versatile applications in various machines.In addition to its practical applications, alternating current also plays a crucial role in modern technology, including the development of renewable energy sources. Wind turbines and solar panels often convert their generated energy into alternating current for compatibility with the existing power grid. This integration of renewable energy sources into the grid is vital for reducing our reliance on fossil fuels and combating climate change.Despite its advantages, alternating current does have some drawbacks. For instance, it can cause issues with certain electronic devices that require a stable and constant voltage supply. However, advancements in technology have led to the creation of rectifiers and inverters, which can convert alternating current to direct current when necessary, mitigating these concerns.In conclusion, alternating current is a fundamental concept in the field of electricity that has revolutionized how we generate, transmit, and utilize power. Its efficiency in long-distance transmission, versatility in applications, and role in integrating renewable energy make it indispensable in our modern world. As we continue to innovate and seek sustainable energy solutions, understanding alternating current will remain vital for future advancements in technology and infrastructure.

电力的发明以难以想象的方式改变了世界。在这个领域的关键发展之一是交流电的概念，或称为交流电，它已成为全球电力传输和分配的标准。理解交流电对任何对电气工程、物理学甚至日常电力应用感兴趣的人来说都是至关重要的。要掌握交流电的重要性，我们首先需要将其与直流电（DC）区分开来。直流电是指电流单向流动的电力，类似于电池提供的电力。相比之下，交流电周期性地改变方向，这使得它能够以更少的能量损失行驶更长的距离。这一特性使得交流电特别适合用于高压电力线，将电力从发电厂输送到家庭和企业。交流电的历史可以追溯到19世纪末，当时尼古拉·特斯拉和乔治·威斯汀豪斯等创新者倡导其使用。他们认识到交流电可以通过变压器轻松转换为不同的电压，使其比直流电更具多功能性。这种有效改变电压水平的能力是交流电成为主导电力分配形式的主要原因之一。交流电的一个重要优点是其在长距离传输电力中的效率。当电力通过电线传输时，它会遇到阻力，导致以热量的形式损失能量。然而，通过提高交流电的电压，这些损失可以最小化。这就是为什么发电站以高电压发电，然后将其降至消费者使用的安全电平。此外，交流电在许多家用电器的运行中也起着至关重要的作用。大多数设备，如冰箱、空调和洗衣机，都是设计为在交流电上运行的。这些电器中的电动机依赖于电流的交替特性来高效运作。例如，由交流电供电的电动机可以轻松改变旋转方向，使其在各种机器中具有多种应用。除了其实际应用外，交流电在现代技术的发展中也发挥着重要作用，包括可再生能源的开发。风力涡轮机和太阳能电池板通常将其产生的能量转换为交流电，以便与现有电网兼容。这种可再生能源与电网的整合对于减少我们对化石燃料的依赖和应对气候变化至关重要。尽管有其优点，交流电也存在一些缺点。例如，它可能会对某些需要稳定且恒定电压供应的电子设备造成问题。然而，技术的进步导致了整流器和逆变器的创建，必要时可以将交流电转换为直流电，从而减轻这些担忧。总之，交流电是电力领域的一个基本概念，彻底改变了我们生成、传输和利用电力的方式。它在长距离传输中的效率、在应用中的多功能性以及在整合可再生能源中的作用使其在现代世界中不可或缺。随着我们继续创新并寻求可持续的能源解决方案，理解交流电将对未来技术和基础设施的发展保持重要意义。