Our solutions
Atlas Copco Rental
Solutions
Udlejningsflåde
Atlas Copco Rental
Nitrogen generatorer
Udlejningsflåde
Oliefrie luftkompressorer
Udlejningsflåde
Oliefrie luftkompressorer
Oliefrie luftkompressorer
Oliesmurte luftkompressorer
Udlejningsflåde
Oliesmurte luftkompressorer
Oliesmurte luftkompressorer
Tilbehør
Udlejningsflåde
Brancher, der anvender vores løsninger
Atlas Copco Rental
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Compressors
Solutions
Produkter
Compressors
Process Gas and Air Equipment
Stort udvalg af kondensatbehandlingsløsninger til industrielle formål
Produkter
Stort udvalg af kondensatbehandlingsløsninger til industrielle formål
Stort udvalg af kondensatbehandlingsløsninger til industrielle formål
Stort udvalg af kondensatbehandlingsløsninger til industrielle formål
Stort udvalg af kondensatbehandlingsløsninger til industrielle formål
Service og reservedele
Compressors
Maksimer din effektivitet
Service og reservedele
Maksimer din effektivitet
Maksimer din effektivitet
Maksimer din effektivitet
Maksimer din effektivitet
Trykluftkompressordele
Service og reservedele
Trykluftkompressordele
Trykluftkompressordele
Trykluftkompressordele
Industriværktøj og systemløsninger
Solutions
Brancher, der anvender vores løsninger
Industriværktøj og systemløsninger
Luftfart
Brancher, der anvender vores løsninger
Luftfart
Luftfart
Luftfart
Brancher, der anvender vores løsninger
Støberier og metalbearbejdningsvirksomheder
Brancher, der anvender vores løsninger
Støberier og metalbearbejdningsvirksomheder
Støberier og metalbearbejdningsvirksomheder
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Brancher, der anvender vores løsninger
Produkter
Industriværktøj og systemløsninger
Bearbejdende værktøjer
Produkter
Bearbejdende værktøjer
Bearbejdende værktøjer
Bearbejdende værktøjer
Bearbejdende værktøjer
Bearbejdende værktøjer
Bearbejdende værktøjer
Trykluftmotorer
Trykluftstilbehør
Produkter
Trykluftstilbehør
Trykluftstilbehør
Industriværktøj og systemløsninger
Vacuum solutions

Ohm’s Laws for Direct and 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: Alternating Current or Direct Current. In this article we will give a short introduction to the laws of Ohm. These laws introduce resistance in the relationship between current and voltage.

What is Ohm’s law for direct current?

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship:
U = R x I
Where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.

What is Ohm’s law for alternating current (and what is self-induction)?

Impedance Z formula, Apparent resistance (Z) in relation to resistance (R) and inductive resistance (X)

An alternating current that passes through a coil gives rise to a magnetic flow. This flow changes magnitude and direction in the same way that an electric current does. When the flow changes, an emf (electromotive force) is generated in the coil, according to the laws of induction.

This emf is counter-directed to the connected pole voltage. This phenomenon is called self-induction. Self-induction in an alternating current unit gives rise in part to phase displacement between the current and the voltage, and in part to an inductive voltage drop. The unit's resistance to the alternating current becomes apparently greater than that calculated or measured with direct current.

Phase displacement between the current and voltage is represented by the angle φ. Inductive resistance (called reactance) is represented by X. Resistance is represented by R. Apparent resistance in a unit or conductor is represented by Z.

Ohm's law for alternating current formula, U=I*Z

Related articles