direct on-line starting

简明释义

直接起动

英英释义

例句

1.The technician explained that direct on-line starting requires a robust electrical system.

技术人员解释说，直接在线启动需要一个强大的电气系统。

2.For small motors, direct on-line starting is usually sufficient.

对于小型电动机，直接在线启动通常足够。

3.The motor uses direct on-line starting to achieve quick startup.

该电机采用直接在线启动以实现快速启动。

4.In industrial applications, direct on-line starting is often preferred for its simplicity.

在工业应用中，通常更喜欢使用直接在线启动，因为它简单易用。

5.When the load is not too high, direct on-line starting can be very effective.

当负载不太高时，直接在线启动可以非常有效。

作文

In the world of electrical engineering, various methods are employed to start electric motors. One such method is known as direct on-line starting, which is commonly used for small to medium-sized motors. This technique involves connecting the motor directly to the power supply, allowing it to start immediately at full voltage. The simplicity and effectiveness of direct on-line starting make it a popular choice among engineers and technicians. When a motor is started using direct on-line starting, it draws a significant amount of current, often five to seven times its full-load current. This high inrush current can lead to voltage dips in the power supply, which may affect other connected devices. Therefore, while direct on-line starting is efficient, it is essential to consider the implications of this method on the overall electrical system. The advantages of direct on-line starting include its straightforward installation and low cost. Since there are minimal components involved, the setup can be completed quickly, making it an ideal solution for applications where time and budget constraints are critical. Additionally, the reliability of direct on-line starting ensures that motors can be brought online with minimal delay, which is crucial in industrial settings where downtime can result in significant losses. However, the high starting current associated with direct on-line starting can cause mechanical stress on the motor and the connected equipment. This stress can lead to increased wear and tear, potentially shortening the lifespan of the motor. To mitigate these risks, engineers often implement soft starters or variable frequency drives (VFDs) in applications where direct on-line starting may not be suitable. These alternatives allow for a more controlled start, reducing the initial current draw and mechanical impact. In conclusion, direct on-line starting is a fundamental method for initiating electric motors, particularly in scenarios where simplicity and cost-effectiveness are paramount. While it comes with certain drawbacks, understanding its operation and implications allows engineers to make informed decisions about when to use this technique. As technology advances, the integration of smarter starting solutions will continue to evolve, but the principles behind direct on-line starting will remain a cornerstone of motor control practices in the field of electrical engineering.

在电气工程的世界中，启动电动机的方法有很多种。其中一种方法被称为直接在线启动，通常用于小到中型电动机。这种技术涉及将电动机直接连接到电源，使其能够立即以全电压启动。直接在线启动的简单性和有效性使其成为工程师和技术人员的热门选择。当使用直接在线启动启动电动机时，它会吸引大量电流，通常是其满载电流的五到七倍。这种高冲击电流可能导致电源中的电压下降，这可能影响其他连接的设备。因此，尽管直接在线启动效率高，但考虑这种方法对整体电气系统的影响至关重要。直接在线启动的优点包括其简单的安装和低成本。由于所涉及的组件很少，因此可以快速完成设置，使其成为时间和预算限制关键的应用的理想解决方案。此外，直接在线启动的可靠性确保电动机能够以最小的延迟上线，这在工业环境中至关重要，因为停机可能导致重大损失。然而，与直接在线启动相关的高启动电流可能会对电动机及其连接的设备造成机械压力。这种压力可能导致磨损增加，从而可能缩短电动机的使用寿命。为了减轻这些风险，工程师通常会在不适合使用直接在线启动的应用中实施软启动器或变频驱动器（VFD）。这些替代方案允许更受控的启动，减少初始电流的吸引和机械影响。总之，直接在线启动是启动电动机的一种基本方法，特别是在简单性和成本效益至关重要的情况下。虽然它有一定的缺点，但理解其操作和影响使工程师能够就何时使用这种技术做出明智的决定。随着技术的进步，更智能的启动解决方案的集成将继续发展，但直接在线启动背后的原理将仍然是电气工程领域电动机控制实践的基石。