back electromotive force

简明释义

反电动势;

英英释义

例句

1.The back electromotive force 反电动势 can limit the maximum current flowing through the circuit.

反电动势 反电动势可以限制流经电路的最大电流。

2.The motor generates a back electromotive force 反电动势 that opposes the applied voltage.

电动机产生的反电动势 反电动势与施加电压相对抗。

3.In regenerative braking systems, back electromotive force 反电动势 is harnessed to recharge the battery.

在再生制动系统中，反电动势 反电动势被利用来给电池充电。

4.When the speed of the motor increases, the back electromotive force 反电动势 also increases.

当电动机的速度增加时，反电动势 反电动势也会增加。

5.Understanding back electromotive force 反电动势 is crucial for designing efficient electric motors.

理解反电动势 反电动势对于设计高效的电动机至关重要。

作文

In the realm of electrical engineering, the concept of back electromotive force is pivotal for understanding how motors and generators operate. The term refers to the voltage that is generated in opposition to the applied voltage when a motor is running. This phenomenon is crucial because it affects the efficiency and performance of electric machines. When an electric motor spins, it generates a voltage due to its motion within a magnetic field. This generated voltage, known as back electromotive force (often abbreviated as BEMF), acts against the current flowing into the motor, thereby reducing the net voltage across the armature. As a result, the motor draws less current than it would if there were no back electromotive force. Understanding back electromotive force is essential for engineers and technicians who design and maintain electric motors. For instance, when starting a motor, the initial current is high because the back electromotive force is minimal. As the motor accelerates, the speed increases, and so does the back electromotive force, which eventually limits the current to a steady value. This relationship between speed and current is vital for ensuring that motors operate efficiently under various load conditions.Moreover, the back electromotive force has significant implications for energy consumption. In applications where motors are frequently started and stopped, such as in conveyor systems or electric vehicles, the management of back electromotive force can lead to substantial energy savings. Engineers often incorporate electronic controls that monitor the back electromotive force to optimize performance and minimize energy use.Additionally, back electromotive force plays a critical role in regenerative braking systems. In electric vehicles, when the driver applies the brakes, the motor switches roles and acts as a generator. The kinetic energy from the vehicle is converted back into electrical energy, which charges the battery. During this process, the back electromotive force generated helps to slow down the vehicle while simultaneously recovering energy that would otherwise be lost as heat in conventional braking systems.In summary, the concept of back electromotive force is fundamental in the field of electrical engineering. It not only influences the performance and efficiency of electric motors but also plays a key role in energy conservation and the development of advanced technologies like regenerative braking. By mastering the principles surrounding back electromotive force, engineers can design more efficient systems that harness electrical energy effectively, paving the way for innovations in electric propulsion and automation. Understanding this concept is not just an academic exercise; it is a practical necessity for anyone involved in the design and operation of electric machinery, making it a cornerstone of modern electrical engineering education.

在电气工程领域，反电动势的概念对于理解电动机和发电机的工作原理至关重要。这个术语指的是当电动机运行时，在施加电压的对立面上产生的电压。这一现象至关重要，因为它影响着电动机的效率和性能。当电动机旋转时，由于其在磁场中的运动，会产生一个电压。这个生成的电压被称为反电动势（通常缩写为BEMF），它会对流入电动机的电流产生反作用，从而降低电枢上的净电压。因此，电动机所需的电流比没有反电动势时要少。理解反电动势对于设计和维护电动机的工程师和技术人员至关重要。例如，在启动电动机时，由于反电动势很小，初始电流会很高。随着电动机加速，速度增加，反电动势也随之增加，最终限制了电流达到一个稳定值。这种速度与电流之间的关系对于确保电动机在各种负载条件下高效运行至关重要。此外，反电动势对能源消耗有重要影响。在电动机频繁启动和停止的应用中，例如输送系统或电动车辆，合理管理反电动势可以带来显著的节能效果。工程师们常常采用电子控制装置来监测反电动势，以优化性能并最小化能耗。此外，反电动势在再生制动系统中也发挥着关键作用。在电动车辆中，当驾驶员踩刹车时，电动机切换角色，变成发电机。车辆的动能被转化为电能，充电到电池中。在此过程中，产生的反电动势有助于减缓车辆速度，同时回收本应在传统制动系统中作为热量损失的能量。总之，反电动势的概念是电气工程领域的基础。它不仅影响电动机的性能和效率，还在节能和先进技术的发展中发挥着关键作用。通过掌握与反电动势相关的原理，工程师可以设计出更高效的系统，有效利用电能，为电动推进和自动化领域的创新铺平道路。理解这一概念不仅是学术上的练习，更是任何参与电气机械设计和操作的人的实际必要性，使其成为现代电气工程教育的基石。