Q:What is the use of capacitors?

As a passive component of the capacitor, its role is nothing more than the following; applied to the power circuit, to achieve bypass, decoupling, filtering and energy storage role, the following classification:

Q:What are the differences between capacitors and capacitors?

Capacitance, resistance, inductance is physical quantity. Capacitors, resistors, inductors are components that have a specific physical quantity (capacitance, resistance, inductance).

Q:What is the principle of capacitance isolation?

When the capacitor is connected to the AC circuit, there is also a charging process in which the charge is stopped when the capacitor voltage is equal to the supply voltage, and then the power supply voltage drops and the capacitor begins to discharge.

Q:Capacitance for AC and DC effects?

This current is also a sine wave, but with the resistance is different, although there is voltage current, but does not consume energy, called reactive power.

Q:What is the relationship between capacitance and voltage?

when you charge 5v, want to be in the first The capacitor is full, the second capacitor half; if you charge a higher voltage 6v, then the first capacitor to diffuse out, the actual performance of the capacitor was breakdown!

Q:Why some Y capacitor is very small, and some Y capacitor is very large?

At the AC power input, it is generally necessary to add three safety capacitors to suppress EMI conduction interference. AC power input is divided into three terminals: FireWire (L) / Neutral (N) / Ground (G). Between the line of fire and the ground and between the zero line and ground in parallel with the capacitor, generally referred to as Y capacitor. The two Y-capacitor connection position is more critical, must meet the relevant safety standards, to prevent electronic equipment leakage or chassis charged, easy to endanger personal safety and life.

Q:How to identify high voltage capacitors is good or bad

Test the resistance at both ends with a multimeter. If the use of a pointer multimeter, and most of the same capacitor, you can see the pointer from small to large a swing process. The difference is not the last return to infinity, but 10m. Inexperienced friends may think that the capacitor breakdown or leakage, in fact, not.

Q:Why does the circuit current gradually decrease when charging the capacitor?

due to the increase in the number of charge, the electrostatic field field strength will gradually increase, increasing the field strength caused by the absorption of electrons to produce exclusion, So that the number of adsorbed charges gradually reduced, the number of charge to reduce the performance of the phenomenon that the charging current is gradually reduced. When the number of charges on the two electrode plates of the capacitor reaches a gradually increasing field strength constraint, the amount of charge is not increased and the equilibrium state is reached, that is, the charge saturation current is zero.

Q:Low voltage capacitor voltage 0.45 and 0.4 What is the difference between usage

0.45 capacitor used in the voltage level is high (for example, the transformer low voltage side voltage may reach 415V), with a tuned reactor (tuning reactor will increase the capacitor terminal voltage) situation; Note that the actual capacity of 0.45 capacitor nominal capacity (Actual voltage / 0.45) ^ 2 times;

Q:What is the difference between the power capacitor and the complement?

In fact, in the case of three-phase imbalance, but also a total complement and sub-all have, the three-phase power factor, respectively, 0.53,0.67,0.71, then, in the 0.71 above this part, The reactive power required by the other parts of the two phases is compensated by tipping.