效率、功率因数及其关系的讨论

Efficiency,Power Factor and their Relationship

效率和功率因数是电气与电子工程中的两个重要参数。它们既是两个不同的概念,又有密切的联系。但在目前的电路分析及模拟电子技术的部分教材中,关于效率、功率因数及其关系问题仍然存在一些错误概念,或者对这些重要的问题言之甚少。本文针对上述问题作了详细地讨论。并通过一个例子分析了效率及功率因数之间的关系,纠正了对这些问题的模糊认识,使这些概念更加明确。笔者认为文中的分析和讨论对电类各专业的学生掌握这些基本问题是有益的。

Efficiency and power factor are two important paramcter in electrical and electronic engineering. They are different concepts and also have close association. There are still some mistakes on efficiency, power factor in some textbooks of circuit analysis and analogue electronics at present, or these important concepts are hardly discussed. These problems are discussed in detail in this paper. The relationship between efficiency and power factor is analyzed by an example. So that the mistakes are corrected and these concepts are more distinct. The author thinks the analyses and discussions in this paper are helpful for the students who are studying electrical and electronic engineering.