alternating current

简明释义

交流电交流电

英英释义

例句

1.Transformers are used to change the voltage levels of alternating current (交流电) for efficient transmission.

变压器用于改变交流电（alternating current）的电压水平，以实现高效传输。

2.Electricians often measure the voltage of alternating current (交流电) when troubleshooting electrical systems.

电工在排查电气系统故障时，通常会测量交流电（alternating current）的电压。

3.The power grid distributes alternating current (交流电) to homes and businesses across the country.

电网向全国的家庭和企业分配交流电（alternating current）。

4.In many countries, the standard frequency of alternating current (交流电) is either 50 or 60 Hertz.

在许多国家，交流电（alternating current）的标准频率为50或60赫兹。

5.Most household appliances operate on alternating current (交流电), making it easy to power them with standard outlets.

大多数家用电器使用交流电（alternating current），因此可以方便地通过标准插座供电。

作文

In the world of electricity, one of the most significant concepts is that of alternating current. 交流电 is a type of electrical current that periodically reverses direction, unlike direct current (DC), which flows in a single direction. This fundamental difference has profound implications for how we generate, transmit, and utilize electrical energy in our daily lives.The history of alternating current dates back to the late 19th century when pioneers like Nikola Tesla and George Westinghouse championed its use over direct current systems. At the time, Thomas Edison was a strong proponent of DC, but it was soon clear that alternating current had several advantages. One of the most notable benefits is its ability to be easily transformed to different voltages. This characteristic allows for efficient long-distance transmission of electricity, reducing energy loss in the process.Today, the majority of electrical power systems around the world rely on alternating current for several reasons. Firstly, it can be transmitted over vast distances with minimal loss of energy, making it ideal for connecting power plants to urban centers. The ability to step up voltage using transformers means that electricity can travel long distances without losing its potency, ensuring that homes and businesses receive reliable power.Moreover, alternating current is more versatile than DC when it comes to powering electric motors. Most household appliances, industrial machines, and electric vehicles are designed to operate on alternating current. This versatility stems from the fact that AC motors are generally simpler, more durable, and less expensive to manufacture compared to their DC counterparts.Another important aspect of alternating current is its waveform. The most common form of alternating current is the sinusoidal wave, characterized by its smooth oscillation. This waveform is not only efficient but also produces less electromagnetic interference, making it suitable for sensitive electronic devices. Additionally, modern technology has allowed us to harness various waveforms of alternating current, including square and triangular waves, for specific applications in electronics and signal processing.However, despite its advantages, alternating current is not without its challenges. One major concern is the risk of electrocution, as the changing voltage levels can be hazardous if proper precautions are not taken. Furthermore, the efficiency of alternating current can be affected by factors such as impedance, which is the opposition to the flow of current in an AC circuit. Engineers must carefully design systems to mitigate these issues and ensure safety and reliability.In conclusion, alternating current plays a vital role in our modern electrical infrastructure. Its ability to be transformed and transmitted over long distances has made it the preferred choice for power distribution worldwide. As technology continues to advance, the importance of alternating current will only grow, paving the way for innovative applications and improvements in energy efficiency. Understanding this concept is essential for anyone interested in the field of electrical engineering or simply looking to comprehend the workings of the electrical systems that power our lives.

在电力的世界中，最重要的概念之一就是交流电。交流电是一种电流类型，它会周期性地改变方向，与单向流动的直流电（DC）不同。这一基本差异对我们如何生成、传输和利用电能有着深远的影响。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·威斯汀豪斯等先驱者倡导其使用，而直流电系统则是托马斯·爱迪生的强烈支持者。然而，很快就清楚了交流电具有多个优势。其中一个显著的好处是它能够轻松转换为不同的电压。这一特性使得电能能够高效地进行长距离传输，从而减少了在此过程中能量的损失。如今，世界上大多数电力系统依赖于交流电，原因有很多。首先，它可以以最小的能量损失在广泛的距离内传输，使其成为连接发电厂与城市中心的理想选择。通过变压器将电压升高意味着电力可以在不失去效力的情况下长途旅行，确保家庭和企业获得可靠的电力。此外，交流电在为电动机供电方面比直流电更具多样性。大多数家用电器、工业机器和电动车辆都设计为在交流电上运行。这种多样性源于AC电动机通常比其DC对应物更简单、更耐用且制造成本更低。另一个重要的方面是交流电的波形。最常见的交流电形式是正弦波，其特征是平滑的振荡。这种波形不仅高效，而且产生的电磁干扰较少，使其适合用于敏感的电子设备。此外，现代技术使我们能够利用各种交流电波形，包括方波和三角波，应用于电子学和信号处理的特定领域。然而，尽管有其优势，交流电也并非没有挑战。一个主要问题是触电风险，因为电压水平的变化可能在未采取适当预防措施时造成危险。此外，阻抗等因素可能会影响交流电的效率，阻抗是AC电路中电流流动的阻力。工程师必须仔细设计系统，以减轻这些问题，确保安全和可靠性。总之，交流电在我们现代电力基础设施中发挥着至关重要的作用。它的可变换性和长距离传输能力使其成为全球电力分配的首选。随着技术的不断进步，交流电的重要性只会增加，为创新应用和能源效率的提升铺平道路。理解这一概念对于任何对电气工程领域感兴趣的人或仅仅希望理解支持我们生活的电力系统运作的人来说都是至关重要的。