An Elementary Treatise on Alternating CurrentsLongmans, Green, 1902 - 211 páginas |
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Página 83
... winding a coil of copper wire round a laminated iron core , and are used for the purpose of absorbing a portion of the pressure between constant potential alternating current mains when it is desired to place between the mains any ...
... winding a coil of copper wire round a laminated iron core , and are used for the purpose of absorbing a portion of the pressure between constant potential alternating current mains when it is desired to place between the mains any ...
Página 114
... winding space of about 368 square inch . Thus the total winding space required for the two coils is -E 8888 FIG . 39 . 9 square inches , or , allow- ing 25 per cent . for insu- lation between the two coils and between different layers ...
... winding space of about 368 square inch . Thus the total winding space required for the two coils is -E 8888 FIG . 39 . 9 square inches , or , allow- ing 25 per cent . for insu- lation between the two coils and between different layers ...
Página 115
William Gould Rhodes. If DC 6x , and DA 4x , then the winding space is ( see Fig . 39 ) — = = 4x2 = 73 whence x 4.27 centimetres . This would give too small a cooling surface , so we take x = 6.5 . Now , from equation ( 15 ) we get— A ...
William Gould Rhodes. If DC 6x , and DA 4x , then the winding space is ( see Fig . 39 ) — = = 4x2 = 73 whence x 4.27 centimetres . This would give too small a cooling surface , so we take x = 6.5 . Now , from equation ( 15 ) we get— A ...
Página 117
... windings , the cooling surface will be greater than 9700 square centimetres . The total volume of iron in the transformer is , by reference to Fig . 39 , seen to be- = 50700 cubic centimetres ( 21 ) This gives a loss of only 0.003 watts ...
... windings , the cooling surface will be greater than 9700 square centimetres . The total volume of iron in the transformer is , by reference to Fig . 39 , seen to be- = 50700 cubic centimetres ( 21 ) This gives a loss of only 0.003 watts ...
Página 122
... windings , the frequency , the dimensions of the core , the thickness of the core stampings , and the number of turns on the primary coil . The resistances of the coils may be calculated by determining the lengths and cross - sections ...
... windings , the frequency , the dimensions of the core , the thickness of the core stampings , and the number of turns on the primary coil . The resistances of the coils may be calculated by determining the lengths and cross - sections ...
Otras ediciones - Ver todas
An Elementary Treatise on Alternating Currents William Gould Rhodes Sin vista previa disponible - 2016 |
An Elementary Treatise on Alternating Currents William Gould Rhodes Sin vista previa disponible - 2019 |
Términos y frases comunes
alternating current alternating-current amperes Answer applied P.D. armature B.Sc C. P. Steinmetz capacity CHEMISTRY choking coil College condenser conductor constant core counter E.M.F. Crown 8vo cubic centimetre curve D.Sc di-phase currents Diagrams E.M.F. of self-induction eddy currents ELECTRICITY ELEMENTARY ENGINEERING equal equation frequency henry hysteresis i₁ Illustrations induction motor instantaneous value iron losses lags lines of force machine magnetic field maximum value mean square mono-phase mutual induction non-inductive resistance ohms output parallel periods per second phase PHYSIOLOGY Plates pole potential difference power factor power given PRACTICAL primary circuit primary current Professor published by Longmans R.M.S. value r₁ r₁² reactance respectively right angles root mean square rotation Royal 8vo Scientific Works published secondary circuit self-induction square centimetre stator synchronism terminals tions torque transformer TREATISE tri-phase v₁ vector voltage volts wattless wattmeter watts winding wire zero
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