back electromotive force

简明释义

反电动势

英英释义

例句

1.During startup, the back electromotive force 反向电动势 is low, allowing higher current to flow and start the motor.

在启动过程中，反向电动势 back electromotive force 较低，允许更高的电流流动以启动电动机。

2.When the motor reaches its maximum speed, the back electromotive force 反向电动势 equals the supply voltage, causing the current to drop to nearly zero.

当电动机达到最大速度时，反向电动势 back electromotive force 等于供电电压，导致电流几乎降为零。

3.Engineers must account for back electromotive force 反向电动势 when designing circuits to ensure efficient operation.

工程师在设计电路时必须考虑反向电动势 back electromotive force 以确保高效运行。

4.In electric motors, the back electromotive force 反向电动势 generated opposes the applied voltage, reducing the current flow.

在电动机中，产生的反向电动势 back electromotive force 会抵消施加的电压，从而减少电流流动。

5.The principle of back electromotive force 反向电动势 is crucial in understanding how regenerative braking works in electric vehicles.

理解反向电动势 back electromotive force 的原理对于理解电动车的再生制动是至关重要的。

作文

In the world of electrical engineering, understanding various concepts is crucial for both students and professionals. One such concept is known as back electromotive force, which plays a significant role in the functioning of electric motors and generators. To grasp this concept fully, it is essential to explore its definition, significance, and applications in everyday technology.The term back electromotive force refers to the voltage generated by a motor or generator that opposes the applied voltage. This phenomenon occurs when the motor is in operation, converting electrical energy into mechanical energy. As the motor spins, it generates a voltage in the opposite direction to the current supplied by the power source. Essentially, this self-induced voltage acts as a counterforce against the incoming voltage, hence the name 'back' electromotive force.Understanding back electromotive force is vital because it directly influences the efficiency and performance of electric motors. When a motor starts, it draws a significant amount of current to overcome inertia and initiate motion. However, as the motor accelerates, the back electromotive force increases, reducing the net voltage across the motor terminals. This reduction in voltage leads to a decrease in the current drawn by the motor, allowing it to operate more efficiently once it reaches its rated speed.The significance of back electromotive force can be observed in various applications. For instance, in electric vehicles, understanding how this force works can help engineers design better battery management systems. When an electric vehicle accelerates, the motors generate back electromotive force, which not only reduces the current drawn from the battery but also helps in regenerative braking. During braking, the motors act as generators, converting kinetic energy back into electrical energy, which is then stored in the battery. This process enhances the overall efficiency of the vehicle and extends its range.Moreover, back electromotive force is also a critical factor in the design of control systems for motors. Engineers must account for this force when designing speed controllers and other electronic devices that manage motor operations. If the back electromotive force is not properly considered, the control system may malfunction, leading to inefficient operation or even damage to the motor.In summary, the concept of back electromotive force is fundamental in the field of electrical engineering. It describes the opposing voltage generated by motors and generators during operation, influencing their efficiency and performance. Understanding this concept is essential for anyone working with electric motors, as it impacts various applications, from electric vehicles to industrial machinery. By grasping the principles behind back electromotive force, engineers and technicians can develop more efficient systems and contribute to advancements in technology that rely on electric motors and generators. As technology continues to evolve, the importance of mastering concepts like back electromotive force will only increase, paving the way for innovations in energy efficiency and sustainable design.

在电气工程的世界中，理解各种概念对学生和专业人士至关重要。其中一个概念被称为反电动势，它在电动机和发电机的运行中发挥着重要作用。要充分掌握这个概念，有必要探讨它的定义、重要性以及在日常技术中的应用。术语反电动势指的是电动机或发电机产生的电压，它与施加的电压相对立。当电动机运转时，这种现象就会发生，它将电能转化为机械能。随着电动机的旋转，它会在与电源提供的电流相反的方向上产生电压。本质上，这种自感应电压充当了施加电压的反作用力，因此得名“反”电动势。理解反电动势至关重要，因为它直接影响电动机的效率和性能。当电动机启动时，它需要消耗大量电流以克服惯性并启动运动。然而，随着电动机加速，反电动势增加，从而减少电动机端子上的净电压。这种电压的降低导致电动机所需的电流下降，使其在达到额定速度后能够更有效地运行。反电动势的重要性可以在各种应用中观察到。例如，在电动车中，理解这一力量的工作原理可以帮助工程师设计更好的电池管理系统。当电动车加速时，电动机会产生反电动势，这不仅减少了从电池中提取的电流，还帮助实现再生制动。在制动过程中，电动机作为发电机，将动能转化为电能，然后储存在电池中。这一过程提高了车辆的整体效率，并延长了其续航里程。此外，反电动势也是电动机控制系统设计中的关键因素。工程师在设计速度控制器和其他管理电动机操作的电子设备时，必须考虑这一力量。如果未能正确考虑反电动势，控制系统可能会出现故障，导致操作效率低下甚至损坏电动机。总之，反电动势的概念在电气工程领域是基本的。它描述了电动机和发电机在运行过程中产生的相对立电压，影响其效率和性能。理解这一概念对于任何与电动机打交道的人来说都是必不可少的，因为它影响着从电动车到工业机械的各种应用。通过掌握反电动势背后的原理，工程师和技术人员可以开发出更高效的系统，为依赖电动机和发电机的技术进步做出贡献。随着技术的不断发展，掌握像反电动势这样的概念的重要性将只会增加，为能源效率和可持续设计的创新铺平道路。