永動機（英文：perpetual motion machine）係指唔需要外界輸入能源、能量或者喺僅有一個熱源嘅條件下就能夠不斷運作嘅機械。歷史上好多人曾經熱衷於研製各種類型嘅永動機，其中包括達芬奇、焦耳等學術大師[1][2]。喺熱力學體系建立後，學界認定永動機同熱力學基本原理嘅設想有所違背，將呢個概念從正統學術界中排除[3][4][5][6]，但坊間追尋永動機嘅研究始終未曾間斷。從另一面睇，亦可以認為，人類對永動機嘅熱情同埋製造永動機嘅種種實踐，亦推動咗熱力學體系嘅建立同埋機械製造技術嘅進步。
- 隆生達：一間位於廣西南寧嘅電力科技企業，聲稱佢哋嘅產品可以突破能量守恆定律，唔使任何外部原料都可以起動而且無限發電。
- ↑ Time-Life Books (1991). Inventive Genius. 143 pages. Page 125. ISBN 0-8094-7699-1
- ↑ Philip J. Mirowski, (1991). More Heat Than Light: Economics As Social Physics: Physics As Nature's Economics 462 pages. Page 15.
- ↑ Derry, Gregory N. (2002-03-04). What Science Is and How It Works. Princeton University Press. p. 167. ISBN 978-1400823116.
- ↑ Roy, Bimalendu Narayan (2002). Fundamentals of Classical and Statistical Thermodynamics. John Wiley & Sons. p. 58. Bibcode:2002fcst.book.....N. ISBN 978-0470843130.
- ↑ "Definition of perpetual motion". Oxforddictionaries.com. 2012-11-22. 原著喺2020-06-16歸檔. 喺2012-11-27搵到.
- ↑ Sébastien Point, Free energy: when the web is free wheeling, Skeptikal Inquirer, January February 2018
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