Views:3 Author:Site Editor Publish Time: 2018-01-19 Origin:Site
A capacitor is an energy storage element that consists of two metal plates and a dielectric interlayer dielectric. Any two conductors that are close together and insulated from each other will make up a capacitor that begins to store charge when a voltage is applied to the conductor.
The process of charging is the process of storing the charge of the capacitor. When the capacitor is connected to the DC power supply, the charge on the metal plate connected to the positive electrode of the power source will run towards the metal plate connected to the negative electrode of the power under the action of the electric field force So that the metal plate connected to the positive electrode of the power supply loses its positive charge. The metal plate connected to the negative electrode of the power supply is negatively charged (the charges of the two metal plates are equal and opposite in sign), and one motor capacitor and capacitor start Charge. In the circuit, the electric charge moves and forms the electric current, because the same-sex electric charge repels the action, makes the electric charge move initially, the electric current Max, then decreases gradually; And the electric capacity of the electric capacity is zero at the electric charge movement Min, , The charge is gradually increased, the voltage between the two metal plates gradually increases, when it increases to equal the supply voltage, the charge is completed, the current decreases to zero.
The discharge process is the process of releasing the stored charge of the capacitor. When the charged capacitor is in a power-free closed path, the charge on the negatively charged metal plate will be charged to the positively charged metal Run on the plate, making the positive and negative charge and out, Zhejiang motor capacitors, capacitors began to discharge.
In the circuit, the electric charge moves and forms the electric current, because of the attracting effect of the opposite electric charge, make the electric current Max at the beginning of the discharge process, and then decrease gradually; The electric capacity of the capacitor is gradually decreased after the discharge process starts Max, When the power is reduced to zero, the discharge is completed and the current decreases to zero.
As the capacitor is charged, there is no current flowing in the circuit, so the capacitor can play a DC blocking effect, in the DC circuit, it can be seen as an open circuit.