Our solutions
Atlas Copco Rental
Solutions
Rental Fleet
Atlas Copco Rental
Nitrogen Generators
Oil-free air compressors
Rental Fleet
Oil-free air compressors
Oil-free air compressors
Oil-lubricated air compressors
Rental Fleet
Oil-lubricated air compressors
Oil-lubricated air compressors
Industries served
Compressors
Solutions
Products
Compressors
Industrial condensate treatment solutions range
Products
Industrial condensate treatment solutions range
Industrial condensate treatment solutions range
Industrial condensate treatment solutions range
Process gas and air equipment
Products
Process gas and air equipment
Process gas and air equipment
Process gas and air equipment
Industrial Tools & Solutions
Solutions
Industries Served
Industrial Tools & Solutions
Aerospace
Industries Served
Aerospace
Aerospace
Aerospace
Aerospace
Foundries & Metal Fabrication
Original equipment manufacturer
Industries Served
Original equipment manufacturer
Original equipment manufacturer
Original equipment manufacturer
Original equipment manufacturer
Industries Served
Industries Served
Products
Industrial Tools & Solutions
Air line accessories
Products
Air line accessories
Air line accessories
Air line accessories
Drilling solutions
Material removal tools
Products
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Material removal tools
Service
Industrial Tools & Solutions
Atlas Copco service solutions
Service
Atlas Copco service solutions
Atlas Copco service solutions
Atlas Copco service solutions
Vacuum solutions

An Introduction to Electricity

Compressed Air Wiki Basic Theory Electricity

In order to turn air into compressed air, you need power. This power comes in the form of electricity: Alternating Current or Direct Current. In this article we will give a short introduction to electricity.

What is electricity? Some basic principles.

Electricity is the result of electrons being separated temporarily from protons, thereby creating a difference in electric potential (or voltage) between the area with excess electrons and the area with a shortage of electrons . When electrons find an electrically-conductive path to move along, electric current flows.

The first electric applications made use of Direct Current (DC) power, whereby the electrical charge from the electron flow is unidirectional. DC is produced by batteries, photovoltaic (PV) solar cells and generators.

The alternating current (AC) used, for example, to power offices and workshops and to make standard, fixed-speed motors rotate, is generated by an alternator. It periodically changes magnitude and direction in a smooth, sinusoidal pattern. Voltage as well as current magnitude grows from zero to a maximum value, then falls to zero, changes direction, grows to a maximum value in the opposite direction and then becomes zero again. The current has then completed a period T, measured in seconds, in which it has gone through all of its values. The frequency is the inverse of the period, states the number of completed cycles per second, and is measured in Hertz. f=1/T f = frequency (Hz) T = time for one period (s). Magnitudes of current or voltage are usually indicated by the root mean square (RMS) value over one period. With a sinusoidal pattern, the relation for the current and voltage root mean square value is: root mean square = (peak value) / V2.

an introduction to power. graphic visually showing the "manual" to power

Periodic but non-sinusoidal current and voltage waveforms are anything that is not a pure sinusoidal waveform. Simplified examples are square, triangular or rectangular waveforms. Often they are derived from mathematical functions, and can be represented by a combination of pure sine waves of different frequencies, sometimes multiples of the lowest (called the fundamental) frequency.
current: i(t) = I0 + i1(t) + i2(t) + … + in(t) + …
voltage: v(t) = V0 + v1(t) + v2(t) + … + vn(t) + …

Related articles

an illustration about a basic theory article in the atlas copco air wiki

Electric Power

Electricity plays a big role in the compression of air. Learn more about electric power and the relationship between active, reactive and apparent power.