active volt-ampere

简明释义

有功功率

英英释义

例句

1.The motor operates efficiently at a load of 150 active volt-ampere 有功伏安.

电动机在150 active volt-ampere 有功伏安 的负载下运行效率高。

2.To ensure efficiency, the system must not exceed its maximum active volt-ampere 有功伏安 rating.

为了确保效率，系统的最大 active volt-ampere 有功伏安 额定值不得超过。

3.Monitoring the active volt-ampere 有功伏安 helps in diagnosing electrical issues in the circuit.

监测 active volt-ampere 有功伏安 有助于诊断电路中的电气问题。

4.The power supply unit is rated at 500 active volt-ampere 有功伏安, making it suitable for high-demand applications.

该电源单元的额定功率为500 active volt-ampere 有功伏安，适用于高需求应用。

5.The generator can produce up to 3000 active volt-ampere 有功伏安 under optimal conditions.

在最佳条件下，发电机最多可以产生3000 active volt-ampere 有功伏安。

作文

In the field of electrical engineering, understanding the concept of power is crucial for both theoretical and practical applications. One of the key terms that often arises in discussions about power is active volt-ampere, which refers to the real power consumed by an electrical device. This term is essential for engineers and technicians who work with alternating current (AC) systems, as it helps them calculate the actual power usage of equipment. Unlike reactive power, which does not perform any useful work, active volt-ampere represents the portion of power that is converted into useful work or energy. The significance of active volt-ampere can be illustrated through various examples. For instance, consider a light bulb. When it is turned on, it consumes a certain amount of electrical energy, which is measured in watts. The wattage of the light bulb indicates its active volt-ampere rating, meaning this is the power it actually uses to produce light. If we were to measure the total power drawn from the circuit, it would include both active volt-ampere and reactive power, but only the active volt-ampere contributes to the illumination of the room.Another important aspect of active volt-ampere is its relationship with power factor. The power factor is a measure of how effectively electrical power is being converted into useful work output. It is defined as the ratio of active volt-ampere to apparent power, which is a combination of both active and reactive power. A power factor close to 1 indicates that most of the power is being used effectively, while a lower power factor suggests that a significant portion of the power is wasted as reactive power.Understanding active volt-ampere is also vital when it comes to designing electrical systems. Engineers must ensure that the components they select can handle the active volt-ampere load to prevent overheating and inefficiencies. For example, when selecting transformers, it is essential to know the active volt-ampere rating to ensure that the transformer can handle the real power demand without exceeding its limits.In summary, the concept of active volt-ampere plays a fundamental role in electrical engineering. It allows professionals to determine the actual power consumption of devices, evaluate the efficiency of power usage through the power factor, and design systems that can adequately support the required loads. By grasping the importance of active volt-ampere, engineers and technicians can make informed decisions that lead to more efficient and effective electrical systems.

在电气工程领域，理解电力的概念对理论和实际应用都至关重要。在讨论电力时，常常出现的一个关键术语是主动伏安，它指的是电气设备消耗的实际功率。这个术语对从事交流（AC）系统的工程师和技术人员来说非常重要，因为它帮助他们计算设备的实际功率使用情况。与不执行任何有用工作的无功功率不同，主动伏安表示转换为有用工作或能量的功率部分。主动伏安的重要性可以通过各种例子来说明。例如，考虑一个灯泡。当它被打开时，它消耗一定量的电能，这用瓦特来衡量。灯泡的瓦特数表示其主动伏安额定值，这意味着这是它实际用于产生光的功率。如果我们测量从电路中提取的总功率，它将包括主动伏安和无功功率，但只有主动伏安对房间的照明有贡献。主动伏安的另一个重要方面是它与功率因数的关系。功率因数是衡量电力转化为有用工作输出的有效性的指标。它被定义为主动伏安与视在功率的比率，视在功率是主动和无功功率的组合。接近1的功率因数表明大多数电力被有效使用，而较低的功率因数则表明相当一部分电力作为无功功率被浪费。理解主动伏安在设计电气系统时也至关重要。工程师必须确保所选择的组件能够承受主动伏安负载，以防止过热和低效率。例如，在选择变压器时，了解主动伏安额定值非常重要，以确保变压器能够处理实际功率需求而不超过其限制。总之，主动伏安的概念在电气工程中起着基础性作用。它使专业人员能够确定设备的实际功耗，通过功率因数评估电力使用的效率，并设计能够充分支持所需负载的系统。通过掌握主动伏安的重要性，工程师和技术人员可以做出明智的决策，从而导致更高效和更有效的电气系统。