Arithmetic of Electricity: A Practical Treatise on Electrical Calculations of All Kinds Reduced to a Series of Rules, All of the Simplest Forms, and Involving Only Ordinary Arithmetic ...N.W. Henley Publishing Company, 1909 - 162 стор. |
З цієї книги
Результати 1-5 із 13
Сторінка 86
... armature not to change the intensity of magnetization ? Solution : 12,9002 x 3 = 499,230,000 . This di- vided by ... core with economy are determined by the tables , keeping in mind that it is not advisable to let the per- meability fall ...
... armature not to change the intensity of magnetization ? Solution : 12,9002 x 3 = 499,230,000 . This di- vided by ... core with economy are determined by the tables , keeping in mind that it is not advisable to let the per- meability fall ...
Сторінка 88
... cores ; 2 and 3 , the gaps between armature and magnet ends ; 4 , the armature core . To cal- culate the relations of magnetizing force to magne- tization the sum of the reluctances of these four parts has to be found . A further ...
... cores ; 2 and 3 , the gaps between armature and magnet ends ; 4 , the armature core . To cal- culate the relations of magnetizing force to magne- tization the sum of the reluctances of these four parts has to be found . A further ...
Сторінка 89
... armature core and of the two gaps . EXAMPLE . The total flux through an armature core is found to be at the rate of 70,000 lines per square inch , and the armature core is 3 inches diameter and 10 inches long . The average length of ...
... armature core and of the two gaps . EXAMPLE . The total flux through an armature core is found to be at the rate of 70,000 lines per square inch , and the armature core is 3 inches diameter and 10 inches long . The average length of ...
Сторінка 90
... armature core is 14 X .3132 = = .000008 . The reluctance of a single air gap is .3132 = .0052 . Thus the armature reluctance is so small that it may be neglected . The permeance of the two air gaps is given by = 100 ( about ) . The ...
... armature core is 14 X .3132 = = .000008 . The reluctance of a single air gap is .3132 = .0052 . Thus the armature reluctance is so small that it may be neglected . The permeance of the two air gaps is given by = 100 ( about ) . The ...
Сторінка 92
... core . CALCULATIONS FOR MAGNETIC CIRCUITS . A magnetic circuit is treated ... armature The leakage coefficient is determined and ap- plied . The requisite ... armature of a dynamo . The magnet is of cast iron , each leg is cylindrical in ...
... core . CALCULATIONS FOR MAGNETIC CIRCUITS . A magnetic circuit is treated ... armature The leakage coefficient is determined and ap- plied . The requisite ... armature of a dynamo . The magnet is of cast iron , each leg is cylindrical in ...
Інші видання - Показати все
Загальні терміни та фрази
50 cents 50 ohms 50 volts air gaps alternating current ampere turns ance appliances armature core battery C. G. S. units calculated calories capacity cells in parallel cells in series circular mils coefficient of leakage coil conductance conductor copper coulombs cross-sectional area cycles per second difference of potential distance divided drop dynamo efficiency electromotive force energy engines EXAMPLE expressed external circuit factors farad field resistance fractions given gives gram heat developed horse power horse-power inductance internal resistance joules kilogram-meter lamps in parallel leads length lines of force lines per square magnet core magnetic circuit meter microfarad microhms mils in diameter motor multiplied number of cells number of turns Ohm's law ohms resistance permeability permeance proportion ratio of conversion reciprocal reduced reluctance Rule 55 Rules 30 sectional area shunt Solution specific resistance square centimeter square inch tion turns of wire voltage weight wrought iron
Популярні уривки
Сторінка 50 - This loss as previously explained, is equal to the square of the current multiplied by the resistance. The...
Сторінка 13 - The strength of the current is equal to the electro-motive force divided by the resistance...
Сторінка 57 - Specific Heat. The specific heat of a substance is the ratio of the heat required to raise the temperature of unit weight of the substance 1 deg.