Axial Film Capacitors, the Chinese name is axial film capacitors, which are commonly used passive components in electronic circuits. It consists of a conductive metal foil and an insulating film stacked alternately. In the circuit, it is used to store electrical energy and has a stable capacitance value, high quality factor and low loss factor. This article will give a comprehensive introduction to Axial Film Capacitors from the aspects of definition, characteristics and advantages, scope of application, classification, trial scope, etc.
Definition
Axial Film Capacitors are a type of film capacitors. Film capacitors are capacitors that use metal foil and film as electrodes and dielectrics, respectively. The definition of Axial Film Capacitors is that its essence is to cover a layer of insulating dielectric film on a conductive metal foil, and then cover it with another layer of metal foil to form an interconnected bipolar plate.
Features and Benefits
Axial Film Capacitors has many unique features and advantages, mainly including the following aspects:
- High capacitance accuracy. The capacitance accuracy of Axial Film Capacitors is very high, which can reach less than five percent. Moreover, the temperature coefficient of capacitance is relatively small, and it has excellent capacitance performance.
- High quality factor. The high quality factor of Axial Film Capacitors means that they are capable of stable, precise and high-fidelity performance in the communications and audio fields.
- High stability. Axial Film Capacitors have very high stability, especially in harsh environments such as high temperature, high humidity, and high pressure.
- Good high frequency performance. Because of the way Axial Film Capacitors are constructed, they have good high frequency performance and are therefore often used in the advanced audio and computer fields.
- Good electrochemical corrosion performance. The electrochemical corrosion performance of Axial Film Capacitors is relatively good, and this material is less corrosive to the environment.
Scope of application
Axial Film Capacitors have a wide range of applications. Here are some typical application scenarios:
- Communication field. Axial Film Capacitors are often used in the communication field due to their excellent stability and high quality factor. For example, it is used in the fields of relay communication, plasma shielding and microwave isolation.
- Audio field. Axial Film Capacitors have very low impedance and distortion, and can maintain high audio fidelity. They are often used in amplifiers, microphones, musical instruments and other fields.
- High frequency circuit. Axial Film Capacitors can be used as contact capacitors in high frequency circuits, providing precise capacitance values for frequency response control.
Classification
The classification of Axial Film Capacitors can be divided into the following categories according to their performance and characteristics:
- Push out the film capacitor. This kind of capacitor uses high molecular polymer as the medium and is made by extruding a film. There are mainly two types of polyester film capacitors and polypropylene film capacitors.
- Metal foil film capacitors. The metal foil and insulating film of this capacitor are alternately laminated, the upper and lower plates are covered by metal foil, and the middle film is used as a medium. There are two common types of polyvinyl fluoride film capacitors and polystyrene film capacitors.
- Film aluminum electrolytic capacitors. This capacitor has good permeability, high electrochemical stability and stable capacitance quality. Prefabricated plates can be scored or pressed into different shapes and sizes.
Trial scope
The trial range of Axial Film Capacitors needs to be determined according to the electrical parameters of the circuit and the requirements for electrical performance. It mainly includes the following aspects:
- Power supply and regulation loop. The features and benefits of Axial Film Capacitors are well suited for applications in power and regulation loops. For example, the fluctuation of DC power supply requires the selection of Axial Film Capacitors with high capacitance, high precision and high stability.
- Oscillating circuit. The oscillation circuit needs to determine the operating frequency of the circuit and select the appropriate Axial Film Capacitors to ensure the stability and accuracy of the circuit.
- Filter circuit. The filter circuit needs to select appropriate Axial Film Capacitors according to the frequency bandwidth and stopband attenuation of the filter.
In conclusion
Axial Film Capacitors have excellent characteristics such as high precision, good stability, high quality factor and high frequency performance. It has a wide range of applications and is one of the indispensable and important components in electronic circuit design. Therefore, in the actual application process, we need to carefully analyze and select the parameters and performance of Axial Film Capacitors in order to give full play to its role and meet the requirements of electronic circuits.
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