| 单词 |
diverter |
| 释义 |
diˈverter
Also divertor.
[f. prec. + -er1, -or.]
a. gen. One who or that which diverts: see the verb.
1621–51Burton Anat. Mel. ii. ii. iv. 282 'Tis the best Nepenthe, surest cordiall, sweetest alterative, present'st diverter. 1661Walton Angler (ed. 3) 42 Angling was..A rest to his mind, a cheerer of his spirits, a diverter [ed. 1 divertion] of sadness. 1727Philip Quarll 204 Seeing his beloved Diverters carrying away by those Birds of Prey, he runs in for his Bow. a1897Mod. A diverter of young people.
b. Electr. Any of several devices that provide an alternative path for an electric current or for magnetic field lines; spec. (a) a resistance placed in parallel with the series winding of a series- or compound-wound d.c. motor or generator in order to alter the size of the current through the windings; (b) a device that protects a transmission line or associated equipment from surges by providing a path to earth for the surge current.
1891J. W. Urquhart Dynamo Constr. xvii. 242 A device, having for its object the controlling of the magnetic intensity was formerly employed in the case of magneto machines. It consisted in placing a ‘divertor’..of soft iron partially across the limbs of the magnet, so as to magnetically short-circuit the magnet. 1909Hawkins & Wallis Dynamo (ed. 5) I. xvi. 542 Where it may be necessary to alter the amount of compounding..a diverter is employed just as with a series-wound dynamo. 1934J. Henderson Automatic Protective Gear v. 63 When the straight-through fault current reaches an abnormal value..the diverter relay operates instantaneously. 1946Nature 23 Nov. 742/1 Their development was first stimulated by the requirements of surge diverters (lighting arresters) for overhead power transmission lines. 1965B. J. Cory High Voltage Direct Current Convertors & Systems viii. 213 Diverters are installed to protect this item from overvoltages that would arise on account of arc-quenching. 1968J. F. Whitfield Electr. Installations Technol. viii. 167 Terminal voltage is adjusted by means of the divertor resistance.., which carries part of the current, thus reducing field current and terminal voltage. |
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