d.c. motor

简明释义

直流电动机；直流马达

英英释义

例句

1.The robot uses a d.c. motor to move its wheels efficiently.

这个机器人使用d.c. 电动机来高效地移动它的轮子。

2.In our project, we replaced the old d.c. motor with a more powerful one.

在我们的项目中，我们用更强大的d.c. 电动机替换了旧的。

3.You can adjust the voltage to change the speed of the d.c. motor.

您可以调整电压来改变d.c. 电动机的速度。

4.The model train operates smoothly thanks to its d.c. motor.

这列模型火车因其d.c. 电动机而运行平稳。

5.A d.c. motor is essential for controlling the speed of the fan.

一个d.c. 电动机对于控制风扇的速度是必不可少的。

作文

The world of electrical engineering is vast and intricate, encompassing a range of devices that power our daily lives. Among these devices, the d.c. motor (直流电动机) stands out as one of the most essential components in various applications. Understanding how a d.c. motor operates and its significance can provide valuable insights into both engineering principles and practical uses. A d.c. motor is an electromechanical device that converts direct current electrical energy into mechanical energy. This transformation occurs through electromagnetic interactions within the motor. The fundamental principle behind a d.c. motor is based on the Lorentz force, which states that a current-carrying conductor placed in a magnetic field experiences a force. This force causes the rotor of the motor to spin, generating mechanical motion. One of the primary advantages of a d.c. motor is its simplicity and ease of control. Unlike alternating current (AC) motors, d.c. motors can start, stop, and reverse direction quickly, making them ideal for applications requiring precise speed and position control. This feature is particularly beneficial in robotics and automation, where accurate movements are crucial. Additionally, the speed of a d.c. motor can be easily adjusted by varying the voltage supplied to it, allowing for great flexibility in operation. The construction of a d.c. motor typically includes key components such as the stator, rotor, commutator, and brushes. The stator provides a magnetic field, while the rotor is the rotating part that interacts with this field. The commutator and brushes work together to ensure that the direction of current flow in the rotor windings changes as the rotor turns, maintaining continuous rotation. This design enables the d.c. motor to operate smoothly and efficiently. In terms of applications, d.c. motors are found in various devices, from small household appliances to large industrial machinery. For example, they are commonly used in electric vehicles, where they provide the necessary torque for acceleration. In addition, d.c. motors are utilized in fans, pumps, conveyors, and even in computer hardware, such as disk drives. Their versatility and reliability make them a preferred choice in many sectors. Despite their advantages, d.c. motors also have some limitations. One significant drawback is the wear and tear of brushes over time, which can lead to maintenance issues. Additionally, they may not be as efficient as some AC motors at higher power levels. However, advancements in technology, such as brushless d.c. motors, are addressing these concerns by eliminating the need for brushes and improving overall efficiency. In conclusion, the d.c. motor (直流电动机) plays a vital role in modern technology, offering a reliable means of converting electrical energy into mechanical motion. Its ease of control, simple construction, and wide range of applications make it an indispensable component in various fields. As technology continues to evolve, the d.c. motor will likely remain a fundamental element in the development of new devices and systems, ensuring its relevance in the future of engineering.

电气工程的世界广阔而复杂，涵盖了一系列为我们的日常生活提供动力的设备。在这些设备中，d.c. motor（直流电动机）作为各种应用中最基本的组成部分之一脱颖而出。理解d.c. motor的工作原理及其重要性，可以为我们提供对工程原理和实际应用的宝贵见解。d.c. motor是一种将直流电能转化为机械能的电机。这个转化过程是通过电机内部的电磁相互作用实现的。d.c. motor的基本原理基于洛伦兹力，这一原理表明，放置在磁场中的载流导体会受到力的作用。这种力使得电机的转子旋转，从而产生机械运动。d.c. motor的主要优点之一是其简单性和易于控制性。与交流电机不同，d.c. motor可以快速启动、停止和反向，适合需要精确速度和位置控制的应用。这一特性在机器人技术和自动化中尤为重要，因为准确的运动至关重要。此外，通过改变供电电压，可以轻松调节d.c. motor的速度，从而实现操作的灵活性。d.c. motor的结构通常包括关键组件，如定子、转子、换向器和刷子。定子提供磁场，而转子是与该磁场相互作用的旋转部分。换向器和刷子共同确保转子绕组中的电流方向随着转子的转动而变化，从而保持连续旋转。这一设计使得d.c. motor能够平稳高效地运行。在应用方面，d.c. motor广泛应用于各种设备，从小型家用电器到大型工业机械。例如，它们常用于电动车辆中，为加速提供必要的扭矩。此外，d.c. motor还被用于风扇、泵、传送带，甚至计算机硬件如磁盘驱动器中。它们的多功能性和可靠性使其成为许多行业的首选。尽管有许多优点，d.c. motor也存在一些局限性。其中一个显著缺点是刷子随时间磨损，可能导致维护问题。此外，在较高功率水平下，它们的效率可能不如某些交流电机。然而，随着技术的进步，例如无刷d.c. motor的出现，正在解决这些问题，通过消除刷子的需求并提高整体效率。总之，d.c. motor（直流电动机）在现代技术中起着至关重要的作用，提供了一种可靠的方式将电能转化为机械运动。其易于控制、结构简单和广泛的应用使其成为各个领域不可或缺的组成部分。随着技术的不断发展，d.c. motor很可能仍然是新设备和系统开发中的基本元素，确保其在工程未来的相关性。