Non-polar capacitor means that the capacitor has no difference between positive and negative poles. Theoretically speaking, non-polar capacitors are of course the best, but the disadvantage is that the capacity cannot be too large. Non-polar capacitors can be composed of two electrolytic capacitors. This article will explain how electrolytic capacitors are combined into non-polar capacitor combinations.
What is an Non-Nonpolar Capacitors?
An Non Nonpolar Capacitors is a capacitor composed of two electrolytic capacitors connected in series. "Non Nonpolar" capacitors refer to polarized capacitors that are not specifically designated or manufactured for non-polar use. These capacitors inherently have a specific polarity, meaning they are designed to operate in a specific direction and can only be connected in a certain way in a circuit. If used in reverse or with reversed polarity, they may fail, short circuit, or become damaged. On the other hand, non-polar or non-polarized capacitors do not have a specific polarity and can be used in either direction within a circuit.
Basic Principles of Capacitors
Let's understand the basic principles of capacitors. A capacitor is a device capable of storing electric charge and consists of two conductor plates and a medium. When a capacitor is powered on, positive charges accumulate on one conductor plate, while negative charges accumulate on another conductor plate, creating an electric field between the two conductor plates. The capacitance of a capacitor depends on the area of the conductor plates, the spacing between the plates, and the dielectric constant of the medium.
During the use of capacitors, sometimes special situations are encountered, such as the need to change the polarity of the capacitor. General capacitors have polarity, that is, they have positive and negative electrodes. However, by connecting two electrolytic capacitors in series, a non-polar capacitor can be formed. This is because electrolytic capacitors have self-healing capabilities and can reverse polarity. Automatically repair when needed.
Electrolytic Capacitors connected in Series Form Non-Polar Capacitors
Non-polarized capacitor can change the polarity of the capacitor. In some special circuits, it is necessary to change the polarity of the capacitor, which cannot be achieved with ordinary capacitors. By connecting two electrolytic capacitors in series, the polarity of the capacitors can be reversed to suit the needs of a specific circuit.
Capacitors are connected in series-the capacity becomes smaller
Non Nonpolar Capacitors can also improve the working stability of the capacitor. Because electrolytic capacitors are self-healing, they are able to automatically repair faults that degrade the capacitor's performance. This gives the electroless capacitor a longer service life and higher reliability.
Two identical electrolytic capacitors can be connected in reverse series to form a non-polar capacitor;
The withstand voltage value = the withstand voltage of an electrolytic capacitor, the capacitor capacity after series connection = the capacitance of one capacitor/2.
If two 220uF/50V electrolytic capacitors are connected in reverse series to form a non-polar capacitor, then the total withstand voltage = 50V and the total capacity = 110uF.
However, there is still a capacitor working under back pressure, so some people apply it like this, connecting a diode in parallel to both ends of each capacitor , it can ensure that the capacitor is always under positive pressure.
It is recommended that the diagram method is safer, but it is not very economical and is not bad for temporary use.
As shown in the picture:
Circuit diagram of electrolytic capacitors connected in series to form non-polar capacitors
Non Nonpolar Capacitors can also be used in some special circuit applications. For example, in some circuits that require frequent changes in capacitance value, the characteristics of Non Nonpolar Capacitors can be used to change the capacitance value by changing the electrolyte concentration or temperature of the electrolytic capacitor. This has important application significance in some regulating circuits.
Two electrolytic capacitors connected in series to form an non-nonpolar capacitors can provide smaller capacitance, change the polarity of the capacitor, improve working stability, and be used in special circuits. By connecting two electrolytic capacitors in series, the needs of the circuit can be met under certain special circumstances and the performance and reliability of the circuit can be improved. Non Nonpolar Capacitors have broad application prospects in the electronic field and deserve further research and exploration.
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