volt ampere

简明释义

伏安

英英释义

例句

1.The generator has an output capacity of 3000 volt ampere (伏安), making it suitable for small appliances.

发电机的输出容量为3000 伏安，使其适合小型电器。

2.The power supply is rated at 500 volt ampere (伏安), which means it can deliver that much power to the devices connected to it.

电源的额定功率为500 伏安，这意味着它可以向连接的设备提供这么多的功率。

3.A 2000 volt ampere (伏安) transformer is used to step down the voltage for residential use.

一个2000 伏安的变压器用于将电压降低以供住宅使用。

4.When calculating the load on a circuit, you should consider both watts and volt ampere (伏安) ratings.

在计算电路负载时，您应该同时考虑瓦特和伏安的额定值。

5.In electrical engineering, the term volt ampere (伏安) is often used to express apparent power.

在电气工程中，术语伏安常用于表示视在功率。

作文

Understanding electrical measurements is crucial for anyone working in the field of electronics or electrical engineering. One important term that often comes up in discussions about power and energy is volt ampere. A volt ampere (VA) is a unit of measurement that represents the apparent power in an electrical circuit. It is calculated by multiplying the voltage (in volts) by the current (in amperes) flowing through the circuit. This measurement is particularly significant because it helps to determine how much power is being used in an electrical system, regardless of whether that power is being converted into useful work or not.In a purely resistive circuit, the volt ampere is equivalent to the real power measured in watts (W). However, in circuits with reactive components, such as inductors and capacitors, the relationship between volt ampere and watts becomes more complex due to the phase difference between voltage and current. In these cases, the real power is often less than the apparent power, and the difference is accounted for by the power factor, which is a measure of how effectively the current is being converted into useful work.The concept of volt ampere is especially relevant when discussing transformers and other electrical devices that operate on alternating current (AC). For example, a transformer rated at 1000 VA can handle a maximum load of 1000 volt ampere under ideal conditions. Understanding this rating is essential for ensuring that electrical systems are designed and operated within their safe limits. Overloading a transformer beyond its volt ampere rating can lead to overheating and potential failure, making it vital for engineers to take this measurement into account during the design process.Moreover, in the realm of renewable energy, such as solar power systems, the volt ampere rating plays a critical role in the sizing of inverters and other components. For instance, if a solar panel produces 300 watts of power at a certain voltage, the corresponding volt ampere would be calculated based on the current generated by the panel. This information is essential for ensuring that the inverter can handle the maximum output from the solar panels without exceeding its capacity.In summary, the understanding of volt ampere is fundamental for anyone involved in electrical engineering or related fields. It provides a clear picture of how much power is being consumed in a system and helps prevent overloads in various electrical components. By grasping the significance of volt ampere, professionals can make informed decisions that enhance the efficiency and safety of electrical systems. Ultimately, mastering this concept not only aids in better design practices but also contributes to the overall advancement of technology in the electrical domain.In conclusion, the term volt ampere encapsulates a vital aspect of electrical engineering, serving as a bridge between theoretical concepts and practical applications. Whether one is designing a new electrical system or troubleshooting an existing one, a solid understanding of volt ampere and its implications can lead to improved performance and reliability in electrical systems.

理解电气测量对于任何在电子或电气工程领域工作的人来说都是至关重要的。一个经常在讨论功率和能量时出现的重要术语是伏安。伏安（VA）是一个测量单位，代表电路中的表观功率。它是通过将电压（以伏特为单位）乘以流经电路的电流（以安培为单位）来计算的。这个测量特别重要，因为它有助于确定电气系统中使用了多少功率，无论这些功率是否被转换为有用的工作。在纯电阻电路中，伏安等同于以瓦特（W）测量的实际功率。然而，在具有反应性元件（如电感器和电容器）的电路中，伏安与瓦特之间的关系变得更加复杂，因为电压和电流之间存在相位差。在这些情况下，实际功率通常小于表观功率，差异由功率因数来解释，功率因数是衡量电流转换为有用工作的有效性的指标。伏安的概念在讨论变压器和其他在交流电（AC）下运行的电气设备时尤其相关。例如，额定为1000 VA的变压器在理想条件下可以处理最大负载1000 伏安。理解这个额定值对于确保电气系统在安全范围内设计和运行至关重要。超载变压器超过其伏安额定值可能导致过热和潜在故障，因此工程师在设计过程中考虑这一测量是至关重要的。此外，在可再生能源领域，如太阳能发电系统，伏安额定值在逆变器和其他组件的尺寸选择中发挥着关键作用。例如，如果太阳能电池板在某一电压下产生300瓦的功率，则相应的伏安将基于电池板产生的电流进行计算。这些信息对于确保逆变器能够处理来自太阳能电池板的最大输出而不超过其容量至关重要。总之，理解伏安对于任何从事电气工程或相关领域的人来说都是基础。它提供了系统中消耗多少功率的清晰图像，并帮助防止各种电气组件的过载。通过掌握伏安的重要性，专业人员可以做出明智的决策，从而提高电气系统的效率和安全性。最终，掌握这一概念不仅有助于更好的设计实践，还有助于推动电气领域技术的整体进步。最后，术语伏安概括了电气工程的一个重要方面，作为理论概念与实际应用之间的桥梁。无论是在设计新的电气系统还是在排查现有系统的问题，扎实理解伏安及其影响都可以提高电气系统的性能和可靠性。