Capacitor with the development of the society, the scope of application is more and more widely.
And electrolytic capacitor
as the capacitor below one of the most common capacitance familiar for people, share with you today mainly about the difference between with and without the pole pole capacitor, first in terms of principle is the same, are used to store electrical charge and release.
Main difference lies in the media, performance, capacity and different structure leads to the use of the environment and use is also different.
And the infinite capacity to comply with the human science and technology progress and the digging of new material.
Introduced one by one below will give you the essential difference between.
What medium is the difference between medium?
Actually very simple it refers to the material between the two plate capacitor.
Electrolyte USES mostly polar capacitor dielectric materials, usually with the volume of capacitor has a large capacity of polar capacitor.
In addition, different electrolyte materials and technology make the polar capacitor with volume capacity will also be different.
Then there is compression and the use of dielectric materials have close relationship.
Non-polar capacitor dielectric materials are many, mostly using metal oxide film, polyester, etc.
Because of the medium reversible or irreversible performance determines the polar and non-polar capacitor using the environment.
Performance difference means the use of performance requirements, demand maximization is the use requirement.
If the power supply section in the TV set made from metal oxide film capacitor filter, and to meet the requirements of the filter capacitor capacity and pressure.
Inside the chassis can only include a power supply.
So can only be used as filtering polarity capacitance, polar capacitor is not reversible.
Is the anode must meet high potential terminal, the cathode must answer the low potential terminal.
Electrolytic capacitor in more than one micro farads, commonly do coupling, coupling, power filtering, etc.
Most non-polar capacitors under 1 micro farads, resonance, coupling, frequency selective, current limiting, etc.
, of course, also have the high pressure of large capacity, multi-purpose in power reactive compensation, phase shift of the motor, use the same frequency conversion power to move on.
Non-polar capacitor type very much, specific according to the actual situation.
Structure does not consider the difference point discharge, what kind of shape capacitance can use environment.
Usually use the electrolytic capacitor (
Few are round, square.
Non-polar capacitor shape has changed.
Like tube, deformation of rectangle, piece of combination, square, round, square and round, and so on, to see where it is used.
And of course the intangible, invisible here means the distributed capacitance.
For the distributed capacitance in high frequency and medium frequency components can never ignore.
Using the difference on the environment and use: (for the internal structure of materials and reason
Polar capacitor to general can do a lot, but the high frequency characteristic is not so good, so generally suitable for scenarios such as power supply filtering, but also have high frequency characteristics of good have a capacitance, such as tantalum electrolytic but its cost is higher prices.
Non-polar capacitor frequency characteristic small volume, low price and good, but it is not suitable for large capacity, such as ceramics capacitors, monolithic capacitors, polyethylene (
Capacitance and so on are all, ceramics capacitors generally used in high frequency filter, more in the oscillation circuit.
Conductor of two close to each other, between a non-conductive layer of insulating medium, constitutes a capacitor.
When capacitors and voltage between the two plate, the capacitor will be storage charge.
But they can distinguish between polar and nonpolar, essentially no difference, but in the use and distinguish above.
That is the difference between them is introduced, thank you for reading.
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