How to make a non-polar capacitor from two polar ones and will such an assembly work fully

Hello dear guests and subscribers of my channel. Today I want to talk to you about how to make one non-polar from a pair of large polarized capacitors. So let's go.

Note. Dear experts! I understand that it is much more expedient and easier to go to the store and buy a much needed non-polar capacitor. But sometimes situations arise when you have to get out of a difficult situation. In this case, the below presented diagram and a scheduled procedure may be useful to you.

Choosing a scheme and preparing accessories

If you dig around the Internet, you can find a fairly large number of different schemes. I want to tell you only about two, and only one of them is more or less acceptable.

So, let's look at a non-polar capacitor circuit of two polar and a pair of diodes.

Assembled, such a capacitor looks like this.

So, for the assembly, we used a 470 uF capacitor, and, according to LRC measurements, a transistometer (by the way, very useful device, about which I wrote in detail on my channel, the link to the article will be at the end of the material), our total capacity turned out to be 173.2 μF.

In principle, this assembly can be simplified and diodes can be completely eliminated, then our assembly will take on the following form and its parameters will be as follows:

As you can see, the parameters are almost identical. But the circuit with diodes is still preferable, since they protect the assembly from reverse polarity.

And, it would seem, why do we need non-polarizers, if in a couple of minutes you can make yourself fairly cheap non-polar capacitors from ordinary ones.

But it's not that simple. The resulting non-polar composite capacitor has a fairly substantial list of restrictions that must be observed so that a quick "puff" does not happen.

What are the limitations of such an assembly

So, a composite non-polar capacitor has the following limitations:

• Quite modest reactive power, which limits the use only to low-current circuits at low voltages.
• This assembly can be used with extreme caution as a starting capacitor. Please note that the startup time should not exceed a couple of seconds. Otherwise, there will be overheating and very fast failure of the composite capacitor due to high reactance.

As you can see, the assembly has limitations, and they are significant, so if you want experiment, then it is quite possible to assemble such an assembly (the main thing is to take into account all the nuances, otherwise it will quick failure).

And if there is no desire to experiment, then we go to the store and buy the required parameters of a non-polar capacitor, period.

Read more about RLC - transistometer can be found here

I would like to ask you, dear experts, to write in the comments if you specifically had any real experience of using such a scheme and what are your impressions. We subscribe, like and comment.