芦笛
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加入时间: 2004/02/14
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作者：芦笛 在 众议院 发贴, 来自 http://www.hjclub.org
Originally, apparent power arose merely as a figure of merit. Major delineations of the concept are attributed to Stanley's Phenomena of Retardation in the Induction Coil (1888) and Steinmetz's Theoretical Elements of Engineering (1915). However, with the development of three phase power distribution, it became clear that the definition of apparent power and the power factor could not be applied to unbalanced polyphase systems. In 1920, a "Special Joint Committee of the AIEE and the National Electric Light Association met to resolve the issue. They considered two definitions:
70年代的电容器行了，看到底是谁出丑。
that is, the quotient of the sums of the real powers for each phase over the sum of the apparent power for each phase.
that is, the quotient of the sums of the real powers for each phase over the magnitude of the sum of the complex powers for each phase.
The 1920 committee found no consensus and the topic continued to dominate discussions. In 1930 another committee formed and once again failed to resolve the question. The transcripts of their discussions are the lengthiest and most controversial ever published by the AIEE (Emanuel, 1993). Further resolution of this debate did not come until the late 1990s.
作者：芦笛 在 众议院 发贴, 来自 http://www.hjclub.org |
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总算找到证据了，虚功的概念早在1888年就阐明了，
