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voltage divider without power losses

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bll_hb

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I want to divide 110ac to multi ac voltage level with out loss power.
if i used voltage divider it will 50% losses.

any suggestion !
 

I do not understand why you think you will get 50% losses.
It sounds like what you need is a transformer. There will be some loss but it shouldn't be anything near 50%.

Brian.
 

I can't use tranformer due to that the input is ac voltage source is series with cap and if i use transformer the voltage drop on the primary side is so low
 

Hi,

It really isn't clear to me why millions of applicatiin use a transformer to get a lower voltage output with good efficiency..but you can't use it.

Why a capacitor?

Why do you talk about the primary side? Use the secondary side..that's how a transformer is meant to work.

Klaus
 

bll_hb said:
multi ac voltage level
Click to expand...

1.
You say a capacitor is in series. Perhaps this could have something to do with a capacitive transformer, or capacitive voltage divider? This needs to be designed with care because it is easy to overload components. It is suitable if you need very little power.

2.
In the manner of a transformer, you might consider an autotransformer (autoformer). It has a single inductor. You can tap at one point, or several points.
 

bll_hb said:
I want to divide 110ac to multi ac voltage level with out loss power.
if i used voltage divider it will 50% losses.

any suggestion !
Click to expand...
As stated above, transformer is the most efficient way.
If you want it continuously adjustable, that can be done too with a variac.
variac.png
 

If you want it done with 0.00% loss, that's easy. Quit now.

Resistive dividers have not only the inherent loss, but a
dismal consistency of output relative to loading. Only a
high-Z load would make any sense for using that.

Depending on how many different voltages and how many
at once, a multi-tapped xfmr with switches could be viable.

Capacitor-blocked could still use a transformer provided
that it is sensibly sized, such that the capacitor does
not dominate the primary current. Transformers come in
many sizes (physically, and electrically).
 

bll_hb said:
I can't use tranformer due to that the input is ac voltage source is series with cap and if i use transformer the voltage drop on the primary side is so low
Click to expand...
Transformers draw very little current (the magnetizing current) besides the low current so that transformer won't significantly affect the drop across the capacitor in series with the AC besides the drop that would occur from the load.
What's the purpose of the capacitor?
 

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