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. |
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Сторінка 85
... Permeability is the ratio of magnetization to magnetizing force , and is obtained by dividing mag- netization by magnetizing force . Permeability has to be determined experimentally for each kind of iron . It is simply the expression of ...
... Permeability is the ratio of magnetization to magnetizing force , and is obtained by dividing mag- netization by magnetizing force . Permeability has to be determined experimentally for each kind of iron . It is simply the expression of ...
Сторінка 87
... permeability ) . 440,000 lines through 4 square inches area is equal to 110,000 lines through 1 square inch ; for this intensity and for wrought iron the permeability = 166. 166 × 4 664. The reluc- = tance therefore = 3.132 664 = .0047 ...
... permeability ) . 440,000 lines through 4 square inches area is equal to 110,000 lines through 1 square inch ; for this intensity and for wrought iron the permeability = 166. 166 × 4 664. The reluc- = tance therefore = 3.132 664 = .0047 ...
Сторінка 88
... permeability = 161. The reluctance therefore , ( b ) = 25.40 ÷ ( 1.2566 × 25.80 × 161 ) = .0048 . The ampere turns 440,000 × .0048 = 2112 . = MAGNETIC CIRCUIT CALCULATIONS . Practically useful calculations include always the attributes ...
... permeability = 161. The reluctance therefore , ( b ) = 25.40 ÷ ( 1.2566 × 25.80 × 161 ) = .0048 . The ampere turns 440,000 × .0048 = 2112 . = MAGNETIC CIRCUIT CALCULATIONS . Practically useful calculations include always the attributes ...
Сторінка 89
... permeability is always equal to unity , whatever the degree of magnetization . For copper and other non - magnetizable metals the variation from unity is so slight that it may , for practical calculations , be treated as unity . LEAKAGE ...
... permeability is always equal to unity , whatever the degree of magnetization . For copper and other non - magnetizable metals the variation from unity is so slight that it may , for practical calculations , be treated as unity . LEAKAGE ...
Сторінка 90
... permeability of 1,921 . By Rule 68 the reluctance of 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 ...
... permeability of 1,921 . By Rule 68 the reluctance of 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 ...
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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
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