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#1
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12VAC to 24VAC Transformer -- Ideas?
I need to find a transformer (converter?) that will allow me to
upconvert from 12VAC to 24VAC in order to drive a small motorized device (50 watts) for continuous duty. I tried using a 110V/220V 'travel' transformer -- it gave me the correct voltage but not enough output wattage (probably not enough turns on the windings). I need a transformer rather than an electronic converter since I am driving an AC motor... isolation isn't an issue so I could go with an Autotransformer. Thanks. |
#2
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A simple transformer with two 12 windings would do the trick.
The primary windig will give you line voltage as an extra bonus. schreef in bericht oups.com... I need to find a transformer (converter?) that will allow me to upconvert from 12VAC to 24VAC in order to drive a small motorized device (50 watts) for continuous duty. I tried using a 110V/220V 'travel' transformer -- it gave me the correct voltage but not enough output wattage (probably not enough turns on the windings). I need a transformer rather than an electronic converter since I am driving an AC motor... isolation isn't an issue so I could go with an Autotransformer. Thanks. |
#3
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Radio Shack has 115volt to 24 volt transformers But if you need to go from
12 to 24 you might look for a transformer with a 12 and 24 volt winding. Feed your 12 volts to the 12 volt side of the transformer and use the 24. Make sure you insulate the 115 volt leads as they will be hot. If you cant find one go to Radio Shack and get a 12 and 24 volt transformer, connect the 115 volt windings to each other, feed 12 volts in and and get 24 out. -- 73 Hank WD5JFR "johan aeq" wrote in message l... A simple transformer with two 12 windings would do the trick. The primary windig will give you line voltage as an extra bonus. schreef in bericht oups.com... I need to find a transformer (converter?) that will allow me to upconvert from 12VAC to 24VAC in order to drive a small motorized device (50 watts) for continuous duty. I tried using a 110V/220V 'travel' transformer -- it gave me the correct voltage but not enough output wattage (probably not enough turns on the windings). I need a transformer rather than an electronic converter since I am driving an AC motor... isolation isn't an issue so I could go with an Autotransformer. Thanks. |
#4
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Duh... an obvious solution that I entirely missed -- thanks to Henry &
Johan as well! |
#7
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Yet another possibility is to get a 110-to-12 volt transformer and a
110-to-24 volt transformer. Connect the 110 volt windings to each other, put your 12 volts into the 12 volt winding and take 24 out of the 24 volt winding. I'm sure you're getting the general idea. . . Roy Lewallen, W7EL Jim Adney wrote: On 13 Jun 2005 12:39:44 -0700 wrote: I need to find a transformer (converter?) that will allow me to upconvert from 12VAC to 24VAC in order to drive a small motorized device (50 watts) for continuous duty. I tried using a 110V/220V 'travel' transformer -- it gave me the correct voltage but not enough output wattage (probably not enough turns on the windings). The 110/220 transformer had more than enough turns, they were just wound with wire that was too small for the current that you require. You could try to find a similar 110/220 transformer with more current capacity, but this would be big. An alternative would be to pick up a transformer with 2 12V secondaries. Ignore the primaries and put the secondaries in series. Then you apply your 12V between one end and the "center tap" and you get 24V between the 2 ends, assuming you have the phasing right. The 2 12V secondaries have to be rated for the current you plan to draw. - ----------------------------------------------- Jim Adney Madison, WI 53711 USA ----------------------------------------------- |
#8
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Roy Lewallen wrote:
Yet another possibility is to get a 110-to-12 volt transformer and a 110-to-24 volt transformer. Connect the 110 volt windings to each other, put your 12 volts into the 12 volt winding and take 24 out of the 24 volt winding. I'm sure you're getting the general idea. . . Roy Lewallen, W7EL Jim Adney wrote: On 13 Jun 2005 12:39:44 -0700 wrote: I need to find a transformer (converter?) that will allow me to upconvert from 12VAC to 24VAC in order to drive a small motorized device (50 watts) for continuous duty. I tried using a 110V/220V 'travel' transformer -- it gave me the correct voltage but not enough output wattage (probably not enough turns on the windings). The 110/220 transformer had more than enough turns, they were just wound with wire that was too small for the current that you require. You could try to find a similar 110/220 transformer with more current capacity, but this would be big. An alternative would be to pick up a transformer with 2 12V secondaries. Ignore the primaries and put the secondaries in series. Then you apply your 12V between one end and the "center tap" and you get 24V between the 2 ends, assuming you have the phasing right. The 2 12V secondaries have to be rated for the current you plan to draw. - ----------------------------------------------- Jim Adney Madison, WI 53711 USA ----------------------------------------------- I did that, but with identical transformers to replace a small power transformer giving 115v@20ma and [email protected] amp Used two 6.3v 1A transformers back to back and a bridge rectifier on the 115v side. |
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