Capacitors (one type of electronic device) generally refer to capacitors.Capacitors, usually referred to as the capacity of their accommodation, are capacitors, which are represented by letters C.Definition 1: Capacitor, as the name implies, is a ‘container“ container ”, is a device that is accommodated.English name: CAPACITOR.Capacitors are one of the electronic components used in a large number of electronic devices. They are widely used in circuit to cross -pass, coupling, bypass, filtering, tuning circuit, energy conversion, control and other aspects in the circuit.Definition 2: Capacitors, any two conductors (including wires) that are insulated and close to each other form a capacitor.
Super capacitor
SuperCapacitor (Ultracapacitor), also known as ElectroCheMicalCapacitor, ElectricALDOUBLITOR, gold capacitance, Fara capacitance, is from the last century. In the 1980s, it developed through polarized electrolytesA kind of electrochemical component of energy storage.It is different from the traditional chemical power supply. It is a power supply between traditional capacitors and batteries and has special performance. It mainly relies on dual -electrodes and oxidation to restore pseudo -capacitance charge storage energy.However, the process of energy storage does not have a chemical reaction. This energy storage process is reversible, and it is precisely because this super capacitor can repeatedly charge and discharge hundreds of thousands of times.The basic principle, like other types of dual -layer capacitors, uses the dual -electrode structure composed of activated carbon polychic electrodes and electrolytes to obtain a large capacity.The prominent advantage is that the power density is high, the charging time is short, the cycle life is long, and the working temperature range is wide. It is the largest capacity of the worlds mass -produced dual -layer capacitors.
Capacitance
Calculating formulas related to capacitors 1. A capacitor, if the power difference between the two levels with 1 library is 1 volt, the capacitor of this capacitor is 1 method, namely: C = Q/U.2. But the size of the capacitor is not determined by Q (with power) or u (voltage), that is,: C = εs/4πkd.Among them, ε is a constant, S is the positive interoperability of the capacitor plate, D is the distance of the capacitor plate, and K is a static electric constant.The common parallel board capacitor, the capacitor is C = εs/D (ε is the dielectric constant of the medium of the polar plate, s is the pole area, and D is the distance between the polar plate).3. Calculation formula of the capacitors potential capacity: E = Cu^2/2 = QU/2.4, multi -capacitor parallel calculation formula: C = C1+C2+C3+...+CN multi -capacitor series Candidate calculation formula: 1/C = 1/C1+1/C2+...+1/CN.5. The capacitors obstacle to the high frequency AC power is reduced, that is, the capacity resistance is small. On the contrary, the capacitance of the capacitor to the AC power of the low frequency is large; the greater the capacity of the AC power.Small, the smaller the capacity, the greater the capacity.
The role of capacitance
1. Winging capacitors are energy storage devices that provide energy for local devices. It can uniform output of the regulator and reduce load demand.Just like a small -scale rechargeable battery, bypass capacitors can be charged and discharge to the device.In order to minimize the impedance, bypass capacitors should be as close as possible to the power supply pipe and ground pipe foot of the load device.This can prevent the ground potential and noise from being raised and noisy caused by excessive input values.The potential is the voltage drop when the ground connection is at the time through the large current burrs.
Capacitance unit
The basic unit of capacitors is: f (method), in addition, there are μF (micro method), PF (leather method), and a relatively small unit, that is: NF (), because the capacity of the capacitor F is very very capableLarge, so we generally see units of μF, NF, PF, not F.Internationally stipulates that when a capacitor is added to the capacitor, the amount of charge that it can store is represented by the capacity of the capacitor (that is, the power under the unit voltage) of the capacitor.The basic unit of capacity is Fara (F).Under the influence of 1 volt voltage, if the charge stored in a capacitor is 1 Cullen, the capacity is set to 1 Fara, Fara is expressed by symbol F, 1F = 1Q/V.In practical applications, the capacitors of capacitors are often much smaller than 1 Fara, and they often use smaller units, such as the mill method (MF), micro -method (μF), nava (NF), leather (PF), etc. TheyThe relationship is: 1 micro method is equal to one millionth of Fara; 1 leather method is equal to one millionth of the micro method, namely: 1 Fara (F) = 1000mm method (MF) 1m method (mf) = 1000 micro microMethod (μF) 1 micro method (μF) = 1000 Na (NF) 1 Na (NF) = 1000 leather method (PF) is: 1F = 1000000 μF1 μF = 1000000pf

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