hp080797
asked on
Trafo
Does anyone know were I can get some informations about
rewindind an trafo (how thick core and how many windings I
shal use)
rewindind an trafo (how thick core and how many windings I
shal use)
Mister hp:
Assuming that "trafo" is a transformer, a common electrical device, the public library is your best bet for finding a book that has the required info. You needn't spend a dime until you know which books you want in your home all the time for immediate reference.
A quick answer:
The ratio of windings in the Primary to windings in the Secondary is the same as the ratio of ac voltage in the Primary to the ac voltage in the secondary.
A quick example:
100 turns of wire in the Primary coil
1000 turns of wire in the Secondary coil
gives a tenfold (10 times) increase in ac voltage. Secondary will output ten times the voltage that the Primary is supplied with. Naturally, what with the rather _strict_ Law of Conservation of Energy, the current, or amperage, will _drop_ by the same exact ratio! There is also a small loss of energy in metallic (iron, steel, or ferrite) core transformers, but it isnt very much. Less that 5-10% or else get a new one, that one has a short cicuit!
Another example:
110 volts ac into Primary.
Device is labelled 2000 volts output.
2000/110 = ratio of approximately 18. Therefore the secondary should have 18 TIMES the number of turns as the primary has. Note: not 18 more turns, 18 times more turns!
You might be thinking that "Database Questions" refers to a large database of all human knowledge. It really refers to questions people have about getting their software databases to work properly!
Assuming that "trafo" is a transformer, a common electrical device, the public library is your best bet for finding a book that has the required info. You needn't spend a dime until you know which books you want in your home all the time for immediate reference.
A quick answer:
The ratio of windings in the Primary to windings in the Secondary is the same as the ratio of ac voltage in the Primary to the ac voltage in the secondary.
A quick example:
100 turns of wire in the Primary coil
1000 turns of wire in the Secondary coil
gives a tenfold (10 times) increase in ac voltage. Secondary will output ten times the voltage that the Primary is supplied with. Naturally, what with the rather _strict_ Law of Conservation of Energy, the current, or amperage, will _drop_ by the same exact ratio! There is also a small loss of energy in metallic (iron, steel, or ferrite) core transformers, but it isnt very much. Less that 5-10% or else get a new one, that one has a short cicuit!
Another example:
110 volts ac into Primary.
Device is labelled 2000 volts output.
2000/110 = ratio of approximately 18. Therefore the secondary should have 18 TIMES the number of turns as the primary has. Note: not 18 more turns, 18 times more turns!
You might be thinking that "Database Questions" refers to a large database of all human knowledge. It really refers to questions people have about getting their software databases to work properly!
ASKER
Trafo=Transformer. It is very difficult to find an book about the subjekt, so please help me. I know that the quotient of primary windings and sekondary windings is equl the quotient of primary voltage and sekondary voltage, but how many windings should there be.
I am avere of, that this is'nt the rigth place to ask this question, but were is.
Pleace do forgive my spelling errors(and gramatics errors)
HP
I am avere of, that this is'nt the rigth place to ask this question, but were is.
Pleace do forgive my spelling errors(and gramatics errors)
HP
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ASKER
Adjusted points to 400
I think so this is not database question. This is Electrical Question. When you need rewind "trafo" (are you from poland ?) then you must know the power, current, voltage etc. This is more complicated as many people think. The beter way is to buy a book. Of course if you need only repair "trafo" :-) then you can count previous windings.