This is an electrical component that can statically store electrical energy in a DC circuit. The stored charge is called electrical capacity and is expressed in Farad. The specific working capacity of the landing is given by the electrical voltage. In an alternating current circuit, the capacitor acts as an alternating current resistor. This has a frequency-dependent impedance value.
Power electronics convert electrical energy with the aid of switching electronic components. Typical applications are frequency converters (change of characteristics) as opposed to converters that convert forms of energy.
What are capacitors made of?
They consist of two conductive surfaces, the electrodes. These are separated from each other by the dielectric, an insulating material. The size of the capacitance is determined by the area of the electrodes. In addition, the distance between the two electrodes is also decisive. The dielectric and the two electrodes can be arranged in parallel or rolled up. Industrially produced capacitors have capacitance values between about 1 picofarad (10 - 12 F) and 1 farad. Supercapacitors can even deliver up to 10,000 farads.
What types of capacitors are available?
The most common type are integrated storage capacitors. These are designed in digital storage circuitry. In addition, ceramic capacitors, aluminum and tantalum electrolytic capacitors, plastic film capacitors and supercapacitors are available. The latter, however, are based on completely different storage principles. These capacitors have fixed capacitance values. Variable capacitors on the other hand have components with adjustable capacitance values.
Electrolytic capacitors are polarized. The anode electrode consists of valve metal on which an extremely thin, electrically insulated oxide layer is produced. The cathode is formed by a solid or liquid electrolyte.
In reactive power compensation systems, the reactive current of electrical consumers in AC voltage networks is reduced.
Folkos or film capacitors have insulated plastic films as dielectric and are among the most commonly used capacitors.
What are capacitors used for?
These components are used in almost all electrical systems and electronic and electrical equipment. They use electrical energy storage devices as intermediate circuit capacitors in frequency converters. Furthermore, they can be used as storage capacitors in sample-and-hold circuits. A very common realization is the use as photo flash capacitor in flash light devices. Here signals are coupled in crossovers of audio devices. Furthermore, they act as smoothing capacitors in power supplies or as backup capacitors in digital circuits.
A further function is the suppression of electromagnetic interference signals (interference suppression capacitors). As power capacitors they compensate for desired phases. In addition, circuits of various capacitors are used to raise and lower and invert supply voltages. Common circuits are charge pumps and their special designs, such as high-voltage cascades.
Capacitors Manufacturer - what is decisive for the customer?
Ultra capacitors are very popular because of their long service life, stability and freedom from maintenance. The same consumer protection regulations and commercial law also apply online. The online customer service, especially in the technical area, knows its trade. It is important for customers to be able to purchase individual components, parts, but also entire series quickly and easily.
Accessories, individual components, such as moulded core, toroidal core, RC networks, switches, relays, SMD chokes, RFI filters, toroidal core chokes, etc. must be available at any time. In case of special requirements or problems a visit on site in the industrial and commercial sector must be absolutely feasible. High-quality explosion-proof motor capacitors are in a class of their own. Manufacturers in this category have many years of experience and can easily deal with customer-specific problems. Advice and support must be available to good manufacturers at all times.