Why Aluminum Electrolytic Capacitor Selection Matters Aluminum electrolytic capacitors are the workhorse of power electronics — used for input and output filtering, DC-Link smoothing, motor drives and energy storage. They also have a limited lifetime that depends on operating temperature and ripple current, so choosing the right capacitance, voltage, ESR and temperature rating is not optional. [...]
The principle of Electrolytic Capacitor leakage current is because the capacitor dielectric is not a complete insulator. When a DC voltage is applied to the capacitor, a leakage current will be generated in the capacitor. The capacitor leakage current is too large, and the capacitor will be heated and burned. Generally, electrolytic capacitors have higher leakage [...]
Characteristics of electrolytic capacitors According to electrode materials, common electrolytic capacitors are mainly aluminum electrolytic capacitors and tantalum electrolytic capacitors. 1. Aluminum electrolytic capacitor Aluminum electrolytic capacitor is a liquid electrolytic capacitor. According to the state of the dielectric material, it is divided into liquid aluminum electrolytic capacitors and solid aluminum electrolytic capacitors. Aluminum electrolytic capacitors [...]
Film Capacitor principle The film is processed to allow metal atoms to attach to the film. The metal is evaporated under vacuum (1200 ° C for aluminum) to the surface of the treated film (the film is cooled to -25 ° C to -35 ° C) to form a metal layer. If the dielectric is short-circuited, [...]
In the past 20 years, the film capacitor has been greatly developed, the volume and weight of the capacitor is reduced by 3 to 4 times, and the technology has been greatly improved. The film capacitor has many advantages, so that the film capacitor is used in DC filter instead of electrolysis. Capacitance is a trend. [...]