Dingfeng Capacitor----How Capacitors Work(Part 1)

From: http://electronics.howstuffworks.com/capacitor.htm
publisher: Katrina Pan
Time: 2017-09-15
Dingfeng Capacitor----How Capacitors Work(Part 1)
In a way, a capacitor is a little like a battery. Although they work in completely different ways, capacitors and batteries both store electrical energy. If you have read How Batteries Work, then you know that a battery has two terminals. Inside the battery, chemical reactions produce electrons on one terminal and absorb electrons on the other terminal. A capacitor is much simpler than a battery, as it can't produce new electrons -- it only stores them.
Inside the capacitor, the terminals connect to two metal plates separated by a non-conducting substance, or dielectric. You can easily make a capacitor from two pieces of aluminum foil and a piece of paper. It won't be a particularly good capacitor in terms of its storage capacity, but it will work.
In theory, the dielectric can be any non-conductive substance. However, for practical applications, specific materials are used that best suit the capacitor's function. Mica, ceramic, cellulose, porcelain, Mylar, Teflon and even air are some of the non-conductive materials used. The dielectric dictates what kind of capacitor it is and for what it is best suited. Depending on the size and type of dielectric, some capacitors are better for high frequency uses, while some are better for high voltage applications. Capacitors can be manufactured to serve any purpose, from the smallest plastic capacitor in your calculator, to an ultra capacitor that can power a commuter bus. NASA uses glass capacitors to help wake up the space shuttle's circuitry and help deploy space probes. Here are some of the various types of capacitors and how they are used.
●air - Often used in radio tuning circuits
●Mylar - Most commonly used for timer circuits like clocks, alarms and counters
●Glass- Good for high voltage applications
●Ceramic - Used for high frequency purposes like antennas,X-ray and MRI machines
●Super capacitor - Powers electric and hybrid cars
In the next section, we'll take a closer look at exactly how capacitors work.
As one of the earliest capacitor manufacturers engaged in producing capacitor for over 28 years in china , we believe one day Dingfeng Capacitor will exist in every corner of the world by means of its reliable quality and good reputation. By the way,Dingfeng sincerely welcomes all the friend to visit our company and hopes to have a good communication and double-win partnership with all of you cause dingfeng capacitor is always on the way to be better! Your views are the driving forces of DingfengI hereby on behalf of all the members of Dingfeng, thank all of you for the long-term supporting and concerning of our growth.
If you have any question about our company or dingfeng capacitor, pls contact us:

Foreign trade : Katrina Pan

Mobile: +86 15067446433

Tel: +86-574-88034090

Fax: +86-574-89111961

E-mail:sale05@dfcapacitor.com

QQ: 1298975481

Skype: 15067446433

Previous:Dingfeng Capacitor---How Capacitors Work(Part 2)

Next:Dingfeng Capacitor---Motor start and motor run capacitors