alternating current

简明释义

交流

英英释义

例句

1.Electric motors often operate on alternating current (交流电) for better efficiency.

电动机通常在交流电 (交流电)下运行，以提高效率。

2.Transformers are used to change the voltage of alternating current (交流电) in power lines.

变压器用于改变电力线路中交流电 (交流电) 的电压。

3.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 (交流电) 来提供电力。

4.In many countries, the standard frequency for alternating current (交流电) is 50 or 60 Hz.

在许多国家，交流电 (交流电) 的标准频率为50或60赫兹。

5.AC generators produce alternating current (交流电) by rotating coils within a magnetic field.

交流发电机通过在磁场中旋转线圈来产生交流电 (交流电)。

作文

The concept of alternating current is fundamental to our understanding of electricity and its applications in modern technology. Alternating current (AC) is an electric current that reverses direction periodically, as opposed to direct current (DC), which flows in one direction only. This characteristic makes alternating current particularly suitable for power distribution over long distances. In this essay, I will explore the history, advantages, and applications of alternating current, highlighting its significance in our daily lives.The development of alternating current can be traced back to the late 19th century, when inventors such as Nikola Tesla and George Westinghouse championed its use. Before this time, most electrical systems relied on direct current, primarily developed by Thomas Edison. However, Edison's system had significant limitations, especially when it came to transmitting electricity over long distances. The resistance in wires caused a considerable loss of energy, making it impractical for widespread use.In contrast, alternating current can be transformed to higher voltages using transformers, which allows it to travel much further without losing significant amounts of energy. This capability revolutionized the way electricity was generated and distributed. By the early 20th century, alternating current became the standard for electrical power systems around the world.One of the main advantages of alternating current is its efficiency in power transmission. High-voltage alternating current lines can carry electricity over hundreds of miles, providing power to urban areas from distant power plants. This is particularly important in regions where renewable energy sources, such as wind or solar, are located far from population centers. The ability to efficiently transmit electricity over long distances has made alternating current the backbone of modern power grids.Moreover, alternating current is also versatile in its applications. It powers our homes, businesses, and industries. Most household appliances, such as refrigerators, air conditioners, and washing machines, are designed to operate on alternating current. Additionally, alternating current is used in various industrial processes, including electric motors, which are essential for manufacturing and transportation.In recent years, there has been a growing interest in the integration of renewable energy sources into the power grid. Many of these sources, like solar panels and wind turbines, generate direct current, which must be converted to alternating current for use in the grid. This has led to advancements in inverter technology, which converts DC to AC efficiently. As we continue to move towards a more sustainable energy future, the role of alternating current will remain vital.In conclusion, alternating current is a crucial component of our electrical systems, enabling efficient power transmission and a wide range of applications. Its development marked a significant turning point in the history of electricity, allowing for the growth of modern infrastructure and technology. As we face new challenges in energy production and consumption, understanding and harnessing the power of alternating current will be essential for building a sustainable future. The legacy of alternating current continues to shape our world, making it an indispensable part of our everyday lives.

交流电的概念是我们理解电力及其在现代技术中应用的基础。交流电（AC）是一种电流，它周期性地改变方向，而与之相对的直流电（DC）则只沿一个方向流动。这一特性使得交流电特别适合于长距离的电力传输。在这篇文章中，我将探讨交流电的历史、优点和应用，强调它在我们日常生活中的重要性。交流电的发展可以追溯到19世纪末，当时尼古拉·特斯拉和乔治·威斯汀豪斯等发明家倡导其使用。在此之前，大多数电气系统依赖于由托马斯·爱迪生开发的直流电。然而，爱迪生的系统存在重大局限性，尤其是在长距离传输电力时。电缆中的电阻导致大量能量损失，使其在广泛使用中变得不切实际。相比之下，交流电可以通过变压器转换为更高的电压，从而使其能够在没有显著能量损失的情况下远距离传输。这一能力彻底改变了电力的产生和分配方式。到20世纪初，交流电成为世界各地电力系统的标准。交流电的主要优点之一是其在电力传输中的效率。高压交流电线路可以在数百英里内输送电力，为偏远地区的城市提供电力。这一点在可再生能源（如风能或太阳能）位于远离人口中心的地区尤为重要。有效的长距离电力传输能力使得交流电成为现代电网的支柱。此外，交流电在应用上也很灵活。它为我们的家庭、企业和工业供电。大多数家用电器，如冰箱、空调和洗衣机，都是设计用于运行在交流电上的。此外，交流电还用于各种工业过程，包括电动机，这对制造和运输至关重要。近年来，人们对将可再生能源整合到电网中的兴趣日益增加。许多这些能源，如太阳能电池板和风力涡轮机，产生直流电，必须转换为交流电才能在电网中使用。这促使逆变器技术的进步，该技术高效地将DC转换为AC。随着我们继续朝着更加可持续的能源未来迈进，交流电的角色将仍然至关重要。总之，交流电是我们电气系统的重要组成部分，能够实现高效的电力传输和广泛的应用。它的发展标志着电力历史上的一个重要转折点，使现代基础设施和技术得以发展。面对电力生产和消费的新挑战，理解和利用交流电的力量对于建设可持续的未来至关重要。交流电的遗产继续塑造我们的世界，使其成为我们日常生活中不可或缺的一部分。