alternating electromotive force

简明释义

交变电动势

英英释义

例句

1.In an AC circuit, the alternating electromotive force causes the current to change direction periodically.

在交流电路中，交流电动势导致电流定期改变方向。

2.The generator produces a steady alternating electromotive force, which is essential for powering the electrical grid.

发电机产生稳定的交流电动势，这对于为电网供电至关重要。

3.The efficiency of transformers relies on the principles of alternating electromotive force.

变压器的效率依赖于交流电动势的原理。

4.Engineers must calculate the alternating electromotive force to design effective power distribution systems.

工程师必须计算交流电动势以设计有效的电力分配系统。

5.The alternating electromotive force in the circuit was measured using an oscilloscope.

电路中的交流电动势是使用示波器测量的。

作文

The concept of alternating electromotive force refers to the voltage that reverses its polarity periodically. This phenomenon is a fundamental aspect of alternating current (AC) systems, which are widely used in electrical engineering and power distribution. Understanding alternating electromotive force is crucial for anyone studying electricity and electronics, as it plays a significant role in how energy is transmitted and utilized. In a typical AC circuit, the alternating electromotive force causes the current to flow in one direction during half of the cycle and then in the opposite direction during the other half. This cyclical nature of the voltage allows for the efficient transmission of electricity over long distances. One of the key advantages of using AC is that it can be easily transformed to different voltage levels using transformers, making it suitable for various applications, from residential power supply to industrial machinery. The mathematical representation of alternating electromotive force is often expressed as a sinusoidal function, which illustrates how the voltage varies with time. The peak value, frequency, and phase angle are essential parameters that define the characteristics of the alternating electromotive force. For instance, in the United States, the standard frequency for AC power is 60 Hz, meaning that the voltage completes 60 cycles per second. This regularity in the frequency ensures that electrical devices operate efficiently and reliably.Moreover, the relationship between alternating electromotive force and current can be described using Ohm's Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. In AC circuits, this relationship becomes more complex due to the presence of reactance, which is the opposition to the change in current caused by inductors and capacitors. Therefore, engineers must consider both resistance and reactance when analyzing AC circuits involving alternating electromotive force. In practical applications, the understanding of alternating electromotive force extends to various fields, including telecommunications, audio equipment, and renewable energy systems. For example, in solar power systems, inverters convert direct current (DC) generated by solar panels into AC, allowing it to be fed into the grid. The design and efficiency of these inverters heavily rely on the principles of alternating electromotive force to ensure optimal performance. In conclusion, the study of alternating electromotive force is indispensable for anyone involved in electrical engineering or related fields. Its implications reach far beyond theoretical concepts, influencing the way we generate, transmit, and utilize electrical energy in our daily lives. As technology continues to evolve, the importance of mastering the principles behind alternating electromotive force will only grow, paving the way for innovations in energy efficiency and sustainability. Understanding alternating electromotive force is not just an academic exercise; it is a gateway to unlocking the potential of modern electrical systems and ensuring a reliable future for energy consumption.

交变电动势的概念是指电压周期性地反转其极性。这种现象是交变电流（AC）系统的基本方面，广泛应用于电气工程和电力分配。理解交变电动势对于任何学习电力和电子学的人来说都是至关重要的，因为它在能量传输和利用中发挥着重要作用。在典型的交流电路中，交变电动势导致电流在周期的一半时间内朝一个方向流动，而在另一半时间内则朝相反方向流动。这种电压的周期性特性使得电力能够高效地在长距离内传输。使用交流电的一个主要优点是可以通过变压器轻松地将其转换为不同的电压水平，使其适用于各种应用，从住宅电源到工业机械。交变电动势通常用正弦函数进行数学表示，表明电压随时间的变化。峰值、频率和相位角是定义交变电动势特征的关键参数。例如，在美国，交流电的标准频率为60 Hz，这意味着电压每秒完成60个周期。这种频率的规律性确保了电气设备的高效和可靠运行。此外，交变电动势与电流之间的关系可以通过欧姆定律进行描述，欧姆定律指出，流过导体的电流与两点之间的电压成正比，与导体的电阻成反比。在交流电路中，由于电感和电容的存在，这种关系变得更加复杂，因此工程师在分析涉及交变电动势的交流电路时，必须同时考虑电阻和电抗。在实际应用中，理解交变电动势的知识扩展到多个领域，包括电信、音频设备和可再生能源系统。例如，在太阳能发电系统中，逆变器将太阳能电池板产生的直流电（DC）转换为交流电（AC），以便并入电网。这些逆变器的设计和效率在很大程度上依赖于交变电动势的原理，以确保最佳性能。总之，研究交变电动势对于任何从事电气工程或相关领域的人来说都是不可或缺的。它的影响远远超出了理论概念，影响着我们在日常生活中生成、传输和利用电能的方式。随着技术的不断发展，掌握交变电动势背后的原理的重要性只会增加，为能源效率和可持续性创新铺平道路。理解交变电动势不仅仅是学术练习；它是开启现代电气系统潜力的门户，确保未来电力消费的可靠性。