Metal film capacitors have many types depending on the medium, such as: electrolytic capacitors, paper capacitors, film capacitors, ceramic capacitor
s, mica capacitors, air capacitors, etc. But the most frequently used in audio equipment is undoubtedly electrolytic capacitors and metal film capacitors. Electrolytic capacitors are mostly used in places that require a large amount of capacitance, such as the filter capacitor of the main power supply part, in addition to filtering, and also for storing electric energy. The metal film capacitors are widely used in the cross-connection of analog signals, the bypass of power supply noise (anti-cross-connection) and other places. Details of the advantages of the metal film capacitor structure: 1. The main circuit inside the core adopts a copper bar bridging process structure, the thickness of the copper bar is guaranteed, the main circuit has a strong flow capacity, and the temperature rise of the copper bar is low. The installation and operation are simple, convenient, fast and efficient, which greatly reduces the probability of error. 2. The main circuit of the metal film capacitor only needs two copper bars, which replaces a large PCB in the past. The material cost and labor cost of the product are greatly reduced, and the reliability of the product is improved. Eliminates the need for PCB plug-in, tin furnace, repair soldering and other processes. 3. The main circuit is separated from the drive control part, so that the strong current/weak current can be separated. Reduce the interference of the main resonant circuit to the chip driving part. It brings convenience to the after-sales maintenance of the product, the components can be reused, and the maintenance cost is reduced. 4. Since the capacitors are packaged in module form, the aluminum shell can be used to dissipate heat, and the movement can be completely sealed. Solve the problem of oil fume, moisture, cockroaches, metal dust, etc. entering the inside of the movement, and improve the reliability and service life of the product. 5. The metal film capacitor is changed from multiple discrete parallel to a single module form, which solves the problems of uneven overcurrent and uneven partial voltage of discrete capacitors, shortens the line distance of the main circuit, and reduces the distribution of inductance to power of the line The influence of components.
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