This is small Power point presentation about different types of capacitors. It deals with different applications of different capacitors.This ppt has some important classification of different capacitors
2. Types of Capacitors
A capacitor (formerly known as a condenser, and prior to that known as a permittor) is a passive two-
terminal electrical component that stores electric energy in an electric field. The forms, styles, and materials of
practical capacitors vary widely, but all contain at least two electrical conductors (called "plates") separated by
an insulating layer (called the dielectric). Capacitors are widely used as parts of electrical circuits in many
common electrical devices.
6. Ceramic capacitors
Ceramic capacitor is a fixed value capacitor in which ceramic material
acts as the dielectric. It is constructed of two or more alternating layers
of ceramic and a metal layer acting as the electrodes.
Types of ceramic Capacitors
Class 1
Class 2
7. Ceramic capcitor types
Ceramic disc capacitor Multilayer ceramic chip
capacitor (MLCC)
High voltage ceramic power
capacitor
8. Electrolytic capacitors
Electrolytic capacitors have a metallic anode covered with an oxidized layer
used as dielectric. The second electrode is a non-solid (wet) or solid
electrolyte. Electrolytic capacitors are polarized.Categorized into three types
Aluminium electrolytic capacitors
Tantalum electrolytic capacitors
Niobium electrolytic capacitors
11. Supercapacitors
Supercapacitors (SC), comprise a family of electrochemical capacitors. Super capacitor, sometimes
called ultra capacitor is a generic term for electric double-layer capacitors (EDLC), pseudo
capacitors and hybrid capacitors
Double-layer capacitance – Storage is achieved by separation of charge in a Helmholtz double
layer at the interface between the surface of a conductor and an electrolytic solution. The distance
of separation of charge in a double-layer is on the order of a fewAngstroms (0.3–0.8 nm). This
storage is electrostatic in origin
Pseudocapacitance – Storage is achieved by redox reactions, electrosorbtion or intercalation on the
surface of the electrode or by specifically adsorpted ions that results in a reversible faradaic charge-
transfer. The pseudocapacitance is faradaic in origin
12.
13. Supercapacitors
Supercapacitors are divided into three families, based on the design of the electrodes:
Double-layer capacitors – with carbon electrodes or derivatives with much higher
static double-layer capacitance than the faradaic pseudocapacitance
Pseudocapacitors – with electrodes out of metal oxides or conducting polymers with
a high amount of faradaic pseudocapacitance
Hybrid capacitors – capacitors with special and asymmetric electrodes that exhibit
both significant double-layer capacitance and pseudocapacitance, such as lithium-ion
capacitors
15. Variable capacitors
Variable capacitors may have their capacitance changed by
mechanical motion. Generally two versions of variable
capacitors has to be to distinguished
Tuning capacitor – variable capacitor for intentionally and
repeatedly tuning an oscillator circuit in a radio or another
tuned circuit
Trimmer capacitor – small variable capacitor usually for one-
time oscillator circuit internal adjustment
17. Polymer capacitors
A polymer capacitor, or more accurate a polymer electrolytic capacitor is an electrolytic capacitor (e-
cap) with a solid electrolyte of a conductive polymer. There are three different types:
Polymer tantalum electrolytic capacitor (Polymer Ta-e-cap)
Polymer aluminum electrolytic capacitor (Polymer Al-e-cap)
Hybrid polymer capacitor (Hybrid polymer Al-e-cap)
19. Power Film capacitors
Film power capacitors mostly use polypropylene film as the dielectric. Other
types include metallized paper capacitors (MP capacitors) and mixed dielectric
film capacitors with polypropylene dielectrics. . MP capacitors serve for cost
applications and as field-free carrier electrodes (soggy foil capacitors) for high
AC or high current pulse loads
20. Film power capacitor types
cylindrical metal can Rectangular power capacitor storage power film capacitor
banks
21. Film capacitors
Film capacitors or plastic film capacitors are non-polarized capacitors with an
insulating plastic film as the dielectric. The dielectric films are drawn to a thin
layer, provided with metallic electrodes and wound into a cylindrical winding. The
electrodes of film capacitors may be metallized aluminum or zinc, applied on one
or both sides of the plastic film, resulting in metallized film capacitors or a
separate metallic foil overlying the film, called film/foil capacitors.