magnetomotive force

简明释义

磁通势

英英释义

例句

1.In a magnetic circuit, the magnetomotive force is analogous to voltage in an electrical circuit.

在磁性电路中，磁动势类似于电路中的电压。

2.The concept of magnetomotive force is essential in understanding how electric motors operate.

理解电动机的工作原理时，磁动势的概念至关重要。

3.A higher magnetomotive force leads to a stronger magnetic field around the conductor.

更高的磁动势会导致导体周围的磁场更强。

4.To calculate the total magnetomotive force in a coil, you multiply the number of turns by the current flowing through it.

要计算线圈中的总磁动势，你需要将绕组的圈数乘以流过它的电流。

5.The magnetomotive force generated by the solenoid can be increased by increasing the number of coils.

通过增加线圈的数量，可以提高电磁铁产生的磁动势。

作文

In the realm of electromagnetism, the concept of magnetomotive force plays a pivotal role in understanding how magnetic fields are generated and manipulated. Magnetomotive force (often abbreviated as MMF) can be defined as the force that drives magnetic flux through a magnetic circuit. It is analogous to electromotive force (EMF) in electrical circuits, where EMF drives electric current. The unit of magnetomotive force is ampere-turns (At), which reflects the product of the current flowing through a coil and the number of turns in that coil.To comprehend magnetomotive force, it is essential to consider its components. When an electric current passes through a coil of wire, it generates a magnetic field around itself. The strength of this magnetic field is directly proportional to the amount of current and the number of turns in the coil. Therefore, if we increase either the current or the number of turns, the magnetomotive force increases, resulting in a stronger magnetic field.This principle is crucial in various applications, particularly in electric motors and transformers. In electric motors, coils are wound around a core, and when current flows through these coils, the resulting magnetomotive force creates a magnetic field that interacts with the magnetic field of the stator, causing the rotor to turn. The efficiency and performance of the motor are significantly influenced by the magnitude of the magnetomotive force generated.Similarly, in transformers, the magnetomotive force is responsible for transferring energy between two coils through electromagnetic induction. The primary coil receives electrical energy, producing a magnetomotive force that establishes a magnetic field in the core. This magnetic field then induces a current in the secondary coil, allowing for energy transfer. The design and efficiency of transformers rely heavily on optimizing the magnetomotive force to minimize losses and maximize energy conversion.Understanding magnetomotive force also involves recognizing the relationship between magnetic flux and reluctance, which is the opposition to the flow of magnetic field lines. Just as resistance affects the flow of electric current in a circuit, reluctance impacts the flow of magnetic flux in a magnetic circuit. The formula relating these concepts is given by: magnetomotive force = magnetic flux × reluctance. This equation highlights the importance of both magnetomotive force and reluctance in determining the efficiency of magnetic circuits.In conclusion, magnetomotive force is a fundamental concept in electromagnetism that underpins many technological advancements. Its influence can be seen in everyday devices such as electric motors and transformers, where the generation and manipulation of magnetic fields are crucial. By understanding how magnetomotive force operates, engineers and scientists can design more efficient systems that harness the power of electromagnetism for various applications, ultimately leading to innovations that enhance our daily lives.

在电磁学领域，磁动势的概念在理解如何产生和操控磁场方面发挥着关键作用。磁动势（通常缩写为MMF）可以定义为驱动磁通通过磁路的力量。它类似于电路中的电动势（EMF），其中EMF驱动电流。磁动势的单位是安培匝数（At），反映了通过线圈流动的电流与线圈匝数的乘积。要理解磁动势，必须考虑其组成部分。当电流通过一根线圈时，它在周围产生一个磁场。这个磁场的强度与电流的大小和线圈的匝数成正比。因此，如果我们增加电流或匝数，磁动势就会增加，从而导致更强的磁场。这一原理在各种应用中至关重要，特别是在电动机和变压器中。在电动机中，线圈缠绕在一个核心上，当电流流经这些线圈时，产生的磁动势形成一个磁场，与定子磁场相互作用，使转子旋转。电动机的效率和性能受到所产生的磁动势大小的显著影响。同样，在变压器中，磁动势负责通过电磁感应在两个线圈之间转移能量。初级线圈接收电能，产生一个磁动势，在核心中建立一个磁场。这个磁场随后在次级线圈中感应出电流，从而实现能量转移。变压器的设计和效率在很大程度上依赖于优化磁动势以最小化损耗并最大化能量转换。理解磁动势还涉及到认识磁通与磁阻之间的关系，磁阻是对磁场线流动的阻碍。就像电阻影响电路中电流的流动一样，磁阻影响磁路中磁通的流动。相关公式为：磁动势 = 磁通 × 磁阻。这个方程强调了磁动势和磁阻在决定磁路效率中的重要性。总之，磁动势是电磁学中的一个基本概念，是许多技术进步的基础。它的影响可以在日常设备中看到，例如电动机和变压器，其中生成和操控磁场至关重要。通过理解磁动势的运作方式，工程师和科学家可以设计出更高效的系统，利用电磁学的力量进行各种应用，最终推动创新，提升我们的日常生活。