Rotating Magnetic Field

time

0

space angles

ϕ

1

ϕ

2

ϕ

3

time phase angles

ϕ

1

ϕ

2

ϕ

3

amplitudes

ϕ

1

ϕ

2

ϕ

3

preset system

3 phase

2 phase

all same phase

all same space angle

This Demonstration shows how combining two or three magnetic fluxes varying in space and time can be used to generate a rotating magnetic field inside an electrical device. The horizontal axis gives the angle in degrees measured from a fixed axis and the vertical axis gives the magnitude of the flux. So at a given time, the graphs for

ϕ

1

,

ϕ

2

, and

ϕ

3

give the variation of these fluxes with the angle. The green curve gives the resultant sum of the fluxes.