counter electromotive force

简明释义

反电动势

英英释义

例句

1.In regenerative braking systems, the counter electromotive force 反电动势 helps to convert kinetic energy back into electrical energy.

在再生制动系统中，反电动势 counter electromotive force有助于将动能转化为电能。

2.The counter electromotive force 反电动势 in an electric circuit opposes the applied voltage.

电路中的反电动势 counter electromotive force抵消施加的电压。

3.Understanding the role of counter electromotive force 反电动势 is crucial in designing efficient motors.

理解反电动势 counter electromotive force的作用对设计高效电机至关重要。

4.When the motor is turned off, the counter electromotive force 反电动势 generated can cause a voltage spike.

当电机关闭时，产生的反电动势 counter electromotive force可能会引起电压尖峰。

5.The counter electromotive force 反电动势 can be measured to determine the efficiency of an electric generator.

可以测量反电动势 counter electromotive force来确定电动发电机的效率。

作文

Understanding the concept of counter electromotive force is crucial in both physics and engineering. The term refers to the voltage that opposes the change in current within a circuit. It is a fundamental principle that underlies the operation of many electrical devices, particularly those involving motors and generators. When an electric current flows through a conductor, it generates a magnetic field around it. If the current changes, the magnetic field also changes, which induces a voltage in the opposite direction. This induced voltage is known as counter electromotive force (or 反电动势 in Chinese). To illustrate this concept, consider an electric motor. When the motor is powered on, it draws current and begins to rotate. As it spins, the motor's rotation generates a magnetic field that induces a counter electromotive force. This opposing voltage acts against the supply voltage, effectively reducing the net voltage across the motor. As a result, the motor does not draw as much current as it would without the presence of counter electromotive force. This phenomenon is essential for the efficient operation of motors, as it prevents them from drawing excessive current which could lead to overheating or damage.In generators, the principle of counter electromotive force plays a similar role. When a generator is turned, it converts mechanical energy into electrical energy. The motion of the generator's rotor within a magnetic field induces a voltage. However, as the generator produces electricity, it also experiences counter electromotive force, which opposes the motion of the rotor. This opposition means that more mechanical energy is required to maintain the same level of output, highlighting the interplay between mechanical and electrical systems.The significance of counter electromotive force extends beyond just motors and generators; it is also a critical factor in battery technology. When a battery is charged, it experiences a counter electromotive force that opposes the flow of current into it. This effect is especially notable in rechargeable batteries, where the charging process must overcome this opposing voltage to effectively store energy. Understanding how counter electromotive force influences charging efficiency can lead to advancements in battery design and performance.In summary, counter electromotive force is a vital concept in the realm of electrical engineering. It represents the voltage that opposes changes in current, affecting the behavior of motors, generators, and batteries. By grasping this principle, engineers and physicists can better design and optimize electrical systems for various applications. As technology continues to advance, the importance of understanding counter electromotive force will only grow, paving the way for innovations in energy efficiency and power management. Whether one is working on electric vehicles, renewable energy systems, or consumer electronics, a solid grasp of counter electromotive force is essential for success in the field of electrical engineering.

理解反电动势的概念对于物理学和工程学至关重要。这个术语指的是在电路中反对电流变化的电压。这是许多电气设备操作的基本原理，特别是涉及电动机和发电机的设备。当电流通过导体流动时，它会在其周围产生一个磁场。如果电流发生变化，磁场也会变化，这会在相反方向上感应出电压。这个感应电压被称为反电动势（在中文中为反电动势）。为了说明这个概念，可以考虑一个电动机。当电动机通电时，它会吸收电流并开始旋转。随着它的旋转，电动机的旋转产生一个磁场，从而感应出反电动势。这个对立的电压作用于供电电压，有效地降低了电动机上的净电压。因此，电动机不会像没有反电动势存在时那样吸收大量电流。这种现象对于电动机的高效运行至关重要，因为它防止电动机吸收过量电流，导致过热或损坏。在发电机中，反电动势的原理发挥着类似的作用。当发电机转动时，它将机械能转化为电能。发电机转子在磁场中的运动感应出电压。然而，随着发电机产生电力，它也经历反电动势，这与转子的运动相对。这种对抗意味着需要更多的机械能来维持同一水平的输出，突显了机械系统与电气系统之间的相互作用。反电动势的重要性不仅限于电动机和发电机；它也是电池技术中的一个关键因素。当电池充电时，它会经历一种反对电流流入的反电动势。这种效应在可充电电池中尤为明显，在这种情况下，充电过程必须克服这种对立电压，以有效存储能量。理解反电动势如何影响充电效率可以推动电池设计和性能的进步。总之，反电动势是电气工程领域中的一个重要概念。它代表了反对电流变化的电压，影响电动机、发电机和电池的行为。通过掌握这一原理，工程师和物理学家可以更好地设计和优化各种应用的电气系统。随着技术的不断进步，理解反电动势的重要性只会增加，为能源效率和电力管理的创新铺平道路。无论是在电动汽车、可再生能源系统还是消费电子产品方面，牢固掌握反电动势都是电气工程领域成功的关键。