in the ac to dc converter schematics diagram,how to adjust the out put current in the fixed voltage.
2007-04-04 14:09:38 · 5 answers · asked by a_haffisch85 1 in Science & Mathematics ➔ Engineering
there is the scematics...i use 230v/24v step down transformer with bridge rectifier..this is a very simple ac/dc converter circuit diagarm.for additional,i want to control the current(the way that we can increase and decrease the current) in the same time,we maintain the output voltage.
2007-04-04 14:55:57 · update #1
Ohms law.
If you want to change the current at fixed voltage, you must change the resistance of the load.
2007-04-05 01:12:39 · answer #1 · answered by Poor one 6 · 0⤊ 0⤋
Generally the trick is to choose carefully the resistor that you place across the fixed voltage... different resistance values will give you different current....
Past that you really need to be posting a Schematic
2007-04-04 21:24:36 · answer #2 · answered by v_2tbrow 4 · 0⤊ 0⤋
You need a combination of common base amplifier for voltage, being driven by a common emitter amplifier using the collector as the current sourcing device for the regulator. There are books available for linear power supply design that would have sample circuits for you to consider. One source for such information would be the magazine "Nuts and Volts". A query to the ARRL might gain some help as well. They maintain a library of their magazines QST, and QEM that might be a source of help as well.
2007-04-04 23:40:39 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Since I can't see your schematic, there's no way to tell
2007-04-04 21:13:17 · answer #4 · answered by Gene 7 · 0⤊ 0⤋
just remember that current is lowered by resistors ;-)
and yeah, seeing your schematic would help.
2007-04-04 21:30:45 · answer #5 · answered by chemMan 3 · 0⤊ 0⤋