Our solutions
Atlas Copco Rental
Solutions
Utleiepark
Atlas Copco Rental
Nitrogengeneratorer
Oljefrie luftkompressorer
Utleiepark
Oljefrie luftkompressorer
Oljefrie luftkompressorer
Oljesmurte kompressorer
Utleiepark
Oljesmurte kompressorer
Oljesmurte kompressorer
Tilbehør
Utleiepark
Industrial Tools & Solutions
Solutions
Bransjer som betjenes
Industrial Tools & Solutions
Bransjer som betjenes
Bransjer som betjenes
Industriell montering
Bransjer som betjenes
Luftfart
Bransjer som betjenes
Luftfart
Luftfart
Luftfart
Luftfart
Produkter
Industrial Tools & Solutions
Bearbeidende verktøy
Produkter
Bearbeidende verktøy
Bearbeidende verktøy
Bearbeidende verktøy
Bearbeidende verktøy
Bearbeidende verktøy
Bearbeidende verktøy
Monteringsverktøy og systemløsninger
Tilbehør til luftledninger
Produkter
Tilbehør til luftledninger
Tilbehør til luftledninger
Tilbehør til luftledninger
Service
Industrial Tools & Solutions
Atlas Copcos serviceløsninger
Service
Atlas Copcos serviceløsninger
Atlas Copcos serviceløsninger
Atlas Copcos serviceløsninger
Kompressorer
Solutions
Produkter
Kompressorer
Industrielle løsninger for kondensatbehandling
Produkter
Industrielle løsninger for kondensatbehandling
Industrielle løsninger for kondensatbehandling
Industrielle løsninger for kondensatbehandling
Industrielle løsninger for kondensatbehandling
Process Gas and Air Equipment
Service og deler
Kompressorer
Luftkompressordeler
Maksimer effektiviteten
Service og deler
Maksimer effektiviteten
Maksimer effektiviteten
Maksimer effektiviteten
Vakuumløsninger

What is the Three-Phase System of Alternating Current?

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. In this article we will talk about alternating current, more specifically about the three-phase system.

the three-phase system of alternating current

First of all, the power of a single alternating current phase fluctuates. For domestic use, this does not truly present a problem. However, for the operation of electric motors it is advisable to use a current that produces more constant power. This is obtained by using three separate power lines with alternating current, running in parallel but with each current phase shifted by 1/3 of a cycle in relation to the other phases.

Three-phase alternating current is produced at the power station in a generator with three separate windings. A single phase application can be connected between the phase and zero. Three-phase applications can be connected using all three phases in two ways, in a star (Y) or delta (Δ) configuration.

With the star connection, a phase voltage lies between the outlets. With a delta connection, a main voltage lies between the outlets. Industrial compressors were among the first industrial machines to be equipped with Variable Speed Drives (VSD), also called Variable Frequency Drives, to control the rotational speed and torque of AC induction motors by controlling the frequency of the electric power lines to the motor. The most common design converts the three phases of the AC input power to DC power using a rectifier bridge. This DC power is converted into quasi-sinusoidal AC power by using an inverter switching circuit (now IGBT-type power semiconductor switches) and pulse width modulation (PWM) techniques.

Related articles

an illustration about the types of compressors for the atlas copco wiki.

The Screw Compressor

Learn more about air compression and the different types of displacement compressors we know today. Here we’re talking about oil-injected and oil-free twin screw compressors.