单词	permanent magnet
释义	permanent magnet noun : a magnet that retains its magnetism after removal of the magnetizing force Example Sentences Recent Examples on the Web In permanent magnet motors, magnets attached to the edge of a spinning rotor produce a magnetic field that is attracted to the opposite poles on the spinning field. Margaret Osborne, Smithsonian Magazine, 11 Aug. 2022 This in many ways is simpler and offers many advantages over the induction and permanent magnet motors currently in the electric vehicles. David Blekhman, Forbes, 6 July 2022 That’s what a permanent magnet is — a bunch of little superconducting loops, one in each atom. Sumeet Kulkarni, Los Angeles Times, 2 July 2022 The performance/price ratio of the Tesla Model 3 and its permanent magnet synchronous reluctance motor contributed to its high unit sales – about three times that of the second bestselling EV in 2019. Peter Cohan, Forbes, 19 May 2022 First, more costly raw rare earth materials upstream in the supply chain can weed out inefficient downstream firms, like permanent magnet producers that are unable to absorb the higher prices. Mary Hui, Quartz, 7 Mar. 2022 The first is with a permanent magnet, like those things that stick to your refrigerator door. Rhett Allain, Wired, 31 Dec. 2021 In a sample of pure iron, the atoms would all align magnetically in the same direction and make a permanent magnet. Melanie Fine, Forbes, 21 Oct. 2021 Today, the NdFeB magnet accounts for the majority of global rare earth permanent magnet production. Mary Hui, Quartz, 14 May 2021 See More Word History First Known Use 1882, in the meaning defined above
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