counterelectromotive force

简明释义

反电动势

英英释义

例句

1.The motor generates a counterelectromotive force that opposes the applied voltage, resulting in reduced current flow.

电动机产生的反电动势抵消了施加电压，导致电流减少。

2.When the generator spins, it creates a counterelectromotive force that can be measured across its terminals.

当发电机旋转时，它在其端子间产生的反电动势是可以测量的。

3.Understanding counterelectromotive force is crucial for designing efficient electric vehicles.

理解反电动势对于设计高效的电动车至关重要。

4.In an electric circuit, the counterelectromotive force acts to limit the maximum current that can flow.

在电路中，反电动势起到限制最大电流流动的作用。

5.As the coil rotates in the magnetic field, it induces a counterelectromotive force that affects the overall circuit performance.

当线圈在磁场中旋转时，它会感应出一个反电动势，影响整体电路性能。

作文

The concept of counterelectromotive force is crucial in understanding the behavior of electrical circuits, especially in the context of inductive components. When we discuss electrical circuits, we often refer to the flow of current and the voltage that drives this flow. However, there is a phenomenon that occurs when the current through an inductor changes: the inductor generates a voltage that opposes the change in current. This opposing voltage is known as counterelectromotive force, or 反电动势 in Chinese. To better understand this, let’s consider a simple circuit consisting of a battery, a switch, and an inductor. When the switch is closed, the battery initiates a flow of current through the inductor. Initially, the inductor resists this change in current due to its inherent property called inductance. As a result, it generates a voltage that opposes the increase in current. This generated voltage is what we refer to as counterelectromotive force. The significance of counterelectromotive force lies in its ability to limit the rate at which current can change in the circuit. If we were to suddenly disconnect the battery while the current is flowing, the inductor would try to maintain the current flow. This is because of the energy stored in its magnetic field. The inductor will generate a high counterelectromotive force in the opposite direction to keep the current flowing, which can lead to a voltage spike that may damage components in the circuit if not managed properly. In practical applications, understanding counterelectromotive force is essential for designing circuits that involve inductive loads, such as motors and transformers. Engineers must account for this phenomenon to ensure that their designs can handle the voltages produced during switching events. For instance, flyback diodes are often used in circuits with inductive loads to safely dissipate the energy stored in the inductor when the current is interrupted. These diodes provide a path for the induced current, thereby protecting sensitive components from high voltage spikes caused by counterelectromotive force. Moreover, the concept of counterelectromotive force is not limited to just inductors. It can also be observed in other areas of physics, such as in electric generators. When a generator produces electricity, it also experiences a counterelectromotive force that opposes the motion of the rotor. This is a fundamental principle that engineers and physicists must consider when designing efficient power generation systems. In conclusion, the understanding of counterelectromotive force is vital for anyone working with electrical circuits. It plays a significant role in the dynamics of inductive components and affects how circuits behave under various conditions. By recognizing the implications of counterelectromotive force, engineers can design safer and more efficient electrical systems, ensuring reliability and longevity in their applications.

“反电动势”这一概念在理解电路行为时至关重要，尤其是在感性元件的背景下。当我们讨论电路时，通常会提到电流的流动和推动这种流动的电压。然而，当电感器中的电流发生变化时，会出现一种现象：电感器会产生一个电压来抵消电流的变化。这个相反的电压被称为“反电动势”，在中文中为“反电动势”。为了更好地理解这一点，我们考虑一个简单的电路，包括一个电池、一个开关和一个电感器。当开关闭合时，电池开始使电流流过电感器。最初，由于其固有的电感特性，电感器会抵抗这种电流的变化。因此，它产生一个电压以抵消电流的增加。这个产生的电压就是我们所称的“反电动势”。“反电动势”的重要性在于它能够限制电路中电流变化的速度。如果我们在电流流动时突然断开电池，电感器会试图保持电流流动。这是因为其磁场中储存了能量。电感器将产生一个高的“反电动势”，以相反的方向保持电流流动，这可能导致电路中组件的电压激增，如果处理不当，可能会损坏组件。在实际应用中，理解“反电动势”对于设计涉及感性负载的电路（如电动机和变压器）至关重要。工程师必须考虑这一现象，以确保他们的设计能够处理在切换事件期间产生的电压。例如，在具有感性负载的电路中，常常使用续流二极管来安全地消散电感器在电流中断时储存的能量。这些二极管为感应电流提供了一条路径，从而保护敏感组件免受由“反电动势”引起的高电压激增。此外，“反电动势”的概念不仅限于电感器。在物理学的其他领域也可以观察到，例如在发电机中。当发电机产生电力时，它也会经历一个与转子运动相反的“反电动势”。这是工程师和物理学家在设计高效发电系统时必须考虑的基本原理。总之，理解“反电动势”对于任何从事电路工作的人来说都是至关重要的。它在感性元件的动态中发挥着重要作用，并影响电路在各种条件下的行为。通过认识到“反电动势”的影响，工程师可以设计出更安全、更高效的电气系统，确保其应用的可靠性和耐用性。