| 单词 | dust-core |
| 释义 | > as lemmasdust-core dust-core n. a core of magnetic powder in which the electrically insulating properties of the binding agent result in reduced core losses. ΚΠ 1920 U.S. Pat. 1,523,109 Telephone loading coil cores of the so-called ‘dust’ type.] 1924 S. R. Roget Dict. Electr. Terms 70/1 Dust core, an iron core for induction in telephone lines in which eddy current and hysteresis losses are negligible. 1928 Trans. Amer. Inst. Electr. Engineers 47 436/2 The commercial use of permalloy-dust-core loading coils..has brought about a number of very important improvements. 1954 E. Molloy Radio & Television Engineers' Ref. Bk. xxx. 11 Cores made of ferrites..are commercially available now, and but for their high cost would have replaced the dust core over the frequency range in which they are advantageous. 1970 D. F. Shaw Introd. Electronics (ed. 2) v. 87 These materials [sc. ferrites] have many advantages over the earlier ‘dust-core’ materials. < as lemmas |
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