alternating voltage

简明释义

1. 交流电压; 2. 交变电压;

英英释义

例句

1.The transformer converts direct current into alternating voltage for efficient transmission over long distances.

变压器将直流电转换为交流电压，以便在长距离传输时提高效率。

2.The power supply in most homes provides alternating voltage, which is essential for running household appliances.

大多数家庭的电源提供交流电压，这对于运行家用电器至关重要。

3.In an AC circuit, the alternating voltage changes direction periodically.

在交流电路中，交流电压会定期改变方向。

4.An oscilloscope can be used to visualize the waveform of alternating voltage in a circuit.

示波器可以用来可视化电路中交流电压的波形。

5.Engineers often need to measure alternating voltage to ensure the safety of electrical systems.

工程师通常需要测量交流电压以确保电气系统的安全性。

作文

Understanding the concept of alternating voltage is essential for anyone studying electrical engineering or working in fields related to electricity. Alternating voltage, or AC voltage, refers to an electric potential that periodically reverses its direction. Unlike direct current (DC) voltage, which flows in a single direction, alternating voltage changes its polarity at regular intervals, typically measured in hertz (Hz). This unique characteristic allows for efficient transmission of electrical energy over long distances, making it the preferred choice for power grids worldwide.The history of alternating voltage can be traced back to the late 19th century when Nikola Tesla and George Westinghouse championed its use. They demonstrated that alternating voltage could be transformed to different voltage levels using transformers, enabling the effective distribution of electricity. This innovation led to the widespread adoption of AC systems, which are still in use today.One of the key advantages of alternating voltage is its ability to be easily converted to higher or lower voltages. This is crucial for minimizing energy loss during transmission. When electricity travels over long distances, high voltages are used to reduce the current, which in turn decreases the heat generated by resistance in the wires. Once the electricity reaches its destination, it can be stepped down to a safer voltage level for consumer use. This process is made possible through the use of transformers, which operate efficiently with alternating voltage.In contrast, direct current systems require more complex and costly solutions for voltage conversion, making alternating voltage a more practical option for large-scale power distribution. Moreover, many household appliances and industrial machines are designed to operate on alternating voltage, further solidifying its importance in our daily lives.Despite its advantages, alternating voltage also has its challenges. One significant issue is the phenomenon known as waveform distortion, which can occur when non-linear loads draw current from the system. This distortion can lead to inefficiencies and potential damage to electrical equipment. Engineers must carefully design systems to minimize these effects, ensuring that alternating voltage remains stable and reliable.Another concern associated with alternating voltage is safety. The periodic change in voltage can pose risks if proper precautions are not taken. Electric shock hazards increase with higher voltages, and thus, safety measures such as grounding and circuit breakers are essential to prevent accidents.In conclusion, the concept of alternating voltage is fundamental to modern electrical systems. Its ability to efficiently transmit power over long distances and its compatibility with various devices make it indispensable in our technologically driven world. As we continue to innovate and improve our energy systems, understanding alternating voltage will remain a crucial aspect of electrical engineering education and practice. The future may hold advancements that enhance the efficiency and safety of alternating voltage systems, but the principles established over a century ago will continue to guide us in harnessing this vital resource effectively.

理解交流电压的概念对任何学习电气工程或在与电力相关领域工作的人来说都是至关重要的。交流电压，或称为AC电压，是指电势周期性地反转其方向的电压。与单向流动的直流电（DC）电压不同，交流电压在规则的时间间隔内改变其极性，通常以赫兹（Hz）为单位进行测量。这一独特特性使得在长距离传输电能方面更加高效，使其成为全球电网的首选。交流电压的历史可以追溯到19世纪末，当时尼古拉·特斯拉和乔治·威斯汀豪斯倡导其使用。他们证明了交流电压可以通过变压器转换为不同的电压水平，从而实现电力的有效分配。这项创新导致了交流系统的广泛采用，至今仍在使用。交流电压的一个主要优点是能够轻松转换为更高或更低的电压。这对减少传输过程中的能量损失至关重要。当电力在长距离上行驶时，会使用高电压来降低电流，从而减少电线中因电阻产生的热量。一旦电力到达目的地，就可以降低到更安全的电压水平供消费者使用。这个过程通过变压器实现，变压器在交流电压下运行高效。相比之下，直流电系统需要更复杂和昂贵的解决方案来进行电压转换，这使得交流电压成为大规模电力分配的更实用选择。此外，许多家用电器和工业机器都设计为在交流电压下运行，进一步巩固了其在我们日常生活中的重要性。尽管有其优点，交流电压也面临着挑战。其中一个重大问题是波形失真现象，当非线性负载从系统中提取电流时可能会发生。这种失真会导致效率降低和潜在的设备损坏。工程师必须仔细设计系统以最小化这些影响，确保交流电压保持稳定和可靠。与交流电压相关的另一个问题是安全性。电压的周期性变化如果不采取适当的预防措施可能会带来风险。较高电压增加了电击危险，因此，接地和断路器等安全措施对于防止事故至关重要。总之，交流电压的概念是现代电气系统的基础。它在长距离高效传输电力的能力以及与各种设备的兼容性使其在我们技术驱动的世界中不可或缺。随着我们不断创新和改善能源系统，理解交流电压将仍然是电气工程教育和实践的关键方面。未来可能会出现增强交流电压系统效率和安全性的进步，但一个多世纪以来建立的原则将继续指导我们有效利用这一重要资源。