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Applications of capacitors : ウィキペディア英語版 | Applications of capacitors
Capacitors have many uses in electronic and electrical systems. They are so ubiquitous that it is rare that an electrical product does not include at least one for some purpose. == Energy storage == A capacitor can store electric energy when it is connected to its charging circuit. And when it is disconnected from its charging circuit, it can dissipate that stored energy, so it can be used like a temporary battery. Capacitors are commonly used in electronic devices to maintain power supply while batteries are being changed. (This prevents loss of information in volatile memory.) Conventional electrostatic capacitors provide less than 360 joules per kilogram of energy density, while capacitors using developing technology can provide more than 2.52 kilojoules per kilogram.〔(Next-gen car solution? Scientists expand uses for electrostatic capacitor )〕 In car audio systems, large capacitors store energy for the amplifier to use on demand. An uninterruptible power supply (UPS) can be equipped with maintenance-free capacitors to extend service life.〔(industrial-europe.com )〕
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