Lectures On the Electromagnet
Lectures On the Electromagnet
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2566 times the ampere turns per centimetre. Now, if the winding is not going to exceed one-half inch in depth, we may allow 4, 000 amperes per square inch without serious overheating. And the 4, 000 ampere turns will require 2-inch length of coil, or each inch of coil carries 2, 000 ampere turns without overheating. Hence each inch of coil one-half inch deep will suffice to magnetize up 20 inches length of iron to the prescribed degree.
Case 2. Leakage assumed to be 50 per cent. Assume B in air...-gap = H = 8, 000, then to force this across re- quires ampere turns 6, 400 per centimetre of air, or 16, - 250 per inch of air. Now, if winding is not going to exceed one-half inch depth, each inch length of coil will 182 LECTURES Otf THE ELECTROMAGNET.
carry 2, 000 ampere tu A Hence, eight inches length of coil one-quarter inch deep will be required for one inch length of air, magnetized up to the prescribed de- gree.
WINDINGS FOE CONSTANT PRESSURE AND FOR CONSTANT CURRENT.
In winding coils for magnets that are to be used on any electric light system, it should be carefully borne in mind that there are separate rules to be considered according to the nature of the supply.
What to read after Lectures On the Electromagnet?
You can find similar books in the "Read Also" column, or choose other free books by Silvanus Phillips Thompson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
2566 times the ampere turns per centimetre. Now, if the winding is not going to exceed one-half inch in depth, we may allow 4, 000 amperes per square inch without serious overheating. And the 4, 000 ampere turns will require 2-inch length of coil, or each inch of coil carries 2, 000 ampere turns without overheating. Hence each inch of coil one-half inch deep will suffice to magnetize up 20 inches length of iron to the prescribed degree.
Case 2. Leakage assumed to be 50 per cent. Assume B in air...-gap = H = 8, 000, then to force this across re- quires ampere turns 6, 400 per centimetre of air, or 16, - 250 per inch of air. Now, if winding is not going to exceed one-half inch depth, each inch length of coil will 182 LECTURES Otf THE ELECTROMAGNET.
carry 2, 000 ampere tu A Hence, eight inches length of coil one-quarter inch deep will be required for one inch length of air, magnetized up to the prescribed de- gree.
WINDINGS FOE CONSTANT PRESSURE AND FOR CONSTANT CURRENT.
In winding coils for magnets that are to be used on any electric light system, it should be carefully borne in mind that there are separate rules to be considered according to the nature of the supply.
What to read after Lectures On the Electromagnet?
You can find similar books in the "Read Also" column, or choose other free books by Silvanus Phillips Thompson to read onlineMoreLess
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