rheostats

简明释义

英[ˈriːəʊstæt]美[ˈriːoʊˌstæt]

n. [电]变阻器；[电]可变电阻（rheostat 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.The driller operates the pumps, drawworks, and rotary table via the drillers console-a control room of gauges, control levers, rheostats, and other pneumatic, hydraulic and electronic instrumentation.

司钻通过司钻控制盘(一个由仪表、控制杆、电阻箱和其它气动、液动及电子仪器组成的控制室)操作泵、绞车、转盘等。

2.The driller operates the pumps, drawworks, and rotary table via the drillers console-a control room of gauges, control levers, rheostats, and other pneumatic, hydraulic and electronic instrumentation.

司钻通过司钻控制盘(一个由仪表、控制杆、电阻箱和其它气动、液动及电子仪器组成的控制室)操作泵、绞车、转盘等。

3.The laboratory technician adjusted the rheostats to control the current flowing through the experiment.

实验室技术员调整了电阻器以控制流经实验的电流。

4.During the science fair, a student demonstrated how rheostats work in a simple circuit.

在科学博览会上，一名学生演示了电阻器在简单电路中的工作原理。

5.In the old theater, they used rheostats to dim the stage lights.

在老剧院，他们使用电阻器来调暗舞台灯光。

6.The engineer explained how rheostats can help regulate voltage in various circuits.

工程师解释了电阻器如何帮助调节各种电路中的电压。

7.The heating system uses rheostats to adjust the temperature based on user preference.

供暖系统使用电阻器根据用户偏好调整温度。

作文

In the world of electrical engineering, there are numerous components that play critical roles in the functioning of circuits. One such component is the rheostats, which is essential for controlling the flow of electric current. A rheostat is a type of variable resistor that allows for the adjustment of resistance in an electrical circuit. This adjustment in resistance can help manage the amount of current flowing through the circuit, making it a valuable tool in various applications. For instance, rheostats are commonly used in lighting systems to dim lights and in motors to control speed. By varying the resistance, engineers can fine-tune the performance of electrical devices to meet specific requirements.The principle behind a rheostat is quite simple. It consists of a resistive element through which current flows. By moving a slider or rotating a knob, the user can change the length of the resistive path, thereby altering the resistance. This mechanism allows for smooth and precise control over the current. In practical terms, when you increase the resistance using a rheostat, less current flows through the circuit, which can result in dimmer lights or slower motor speeds. Conversely, reducing the resistance allows more current to flow, brightening lights or increasing motor speed.One of the significant advantages of using rheostats is their simplicity and effectiveness. They are relatively easy to implement in various electronic devices, making them a popular choice among engineers and hobbyists alike. However, it is essential to note that while rheostats are useful, they also have limitations. For example, they can generate heat due to power dissipation, which can lead to inefficiencies in some applications. Therefore, in situations where high efficiency is crucial, alternative solutions such as electronic controllers may be preferred.Moreover, the advent of digital technology has introduced new ways to control electrical devices. While traditional rheostats are still widely used, digital potentiometers and microcontrollers are becoming increasingly popular. These modern alternatives offer enhanced precision and control, allowing for more complex adjustments than what a simple rheostat can provide. Nonetheless, the fundamental concept of varying resistance to control current remains the same.In summary, rheostats play a vital role in the field of electrical engineering by providing a means to control current flow in circuits. Their ability to adjust resistance makes them indispensable in many applications, from dimming lights to regulating motor speeds. Despite the emergence of advanced technologies, rheostats continue to be a relevant and practical solution for many electrical engineering challenges. Understanding how rheostats work and their applications allows engineers to design better systems and improve the functionality of electronic devices. As technology evolves, it will be interesting to see how the use of rheostats adapts and integrates with new innovations in the field.

在电气工程的世界中，有许多组件在电路的功能中发挥着关键作用。其中一个组件是电位器，它对于控制电流的流动至关重要。电位器是一种可变电阻器，允许调整电路中的电阻。这种电阻的调整可以帮助管理流经电路的电流，使其在各种应用中成为一种有价值的工具。例如，电位器通常用于照明系统中以调暗灯光，以及在电机中控制速度。通过改变电阻，工程师可以精细调整电气设备的性能以满足特定要求。电位器背后的原理非常简单。它由一个电阻元件组成，电流通过该元件流动。通过移动滑块或旋转旋钮，用户可以改变电阻路径的长度，从而改变电阻。这种机制允许对电流进行平滑和精确的控制。在实际操作中，当您使用电位器增加电阻时，流经电路的电流减少，这可能导致灯光变暗或电机速度变慢。相反，降低电阻会允许更多的电流流动，从而使灯光变亮或提高电机速度。使用电位器的一个显著优点是它们的简单性和有效性。它们相对易于在各种电子设备中实现，因此在工程师和爱好者中广受欢迎。然而，值得注意的是，虽然电位器很有用，但它们也存在局限性。例如，由于功率损耗，它们可能会产生热量，这在某些应用中可能导致效率低下。因此，在高效能至关重要的情况下，可能更倾向于选择替代方案，如电子控制器。此外，数字技术的出现引入了控制电气设备的新方法。尽管传统的电位器仍然被广泛使用，但数字电位器和微控制器越来越受欢迎。这些现代替代品提供了增强的精度和控制，允许比简单的电位器提供更复杂的调整。尽管如此，变化电阻以控制电流的基本概念仍然是相同的。总之，电位器通过提供一种控制电路中电流流动的方法，在电气工程领域中发挥着重要作用。它们调整电阻的能力使它们在许多应用中不可或缺，从调暗灯光到调节电机速度。尽管先进技术的出现，电位器仍然是许多电气工程挑战的相关和实用解决方案。理解电位器的工作原理及其应用使工程师能够设计更好的系统并改善电子设备的功能。随着技术的发展，观察电位器的使用如何适应和与该领域的新创新结合将是非常有趣的。