Knowledge

The following two factors can be considered when Selection of coupling capacitor: 1. If the capacity of the coupling capacitor is too small, low-frequency signals will be severely attenuated when passing through the coupling capacitor, or even fail to pass. It is best to use a signal generator to inject a signal at the input of [...]

Organic film capacitor use organic plastic film as the medium, and metal foil or metalized film as the electrode. They are made by winding (except for laminated structure). Among them, polyester film and polypropylene film are the most widely used. There are more than a dozen kinds of organic films used in the manufacture of capacitors. [...]

Reasons that affect the capacity of film capacitors: The capacity of the film capacitor depends on the area of ​​the film metal layer, so the decrease in capacity is mainly caused by the reduction of the area of ​​the metal plating layer affected by external factors. In the capacitor manufacturing process, there is a trace of [...]

How to discharge an electrolytic capacitor 1. For small lead aluminum electrolytic capacitors, just short-circuit and discharge them directly, but generally we don't recommend them. 2. For the horn-type electrolytic capacitor with a little larger capacity, you can make a 220v/60-100w bulb, or use a resistor to discharge slowly. 3. For bolt-type high-voltage and large-capacity electrolytic [...]

Fan start capacitor connection detection method Household electric fans use single-phase AC motors, so only one live wire and one neutral wire can work normally, but in order to protect the motor, an additional electric fan starting capacitor needs to be installed, which can avoid the time of starting The winding is burnt out because of [...]