Toroid
A toroid is a
doughnut-shaped object whose surface is a
torus. Its annular shape is generated by revolving a circle around an axis external to the circle.
A coil of insulated
wire in a doughnut or pretzel shape is an example of a toroidal object. These are used as
inductors in circuits such as low frequency transmitters and receivers because they possess higher
inductance and carry greater current than similarly constructed
solenoids. They are also used as
transformers in main power supplies. Toroidal coils reduce
resistance, due to the larger diameter and smaller number of turns in the winding.
Encyclopedia
A
toroid is a
doughnut-shaped object whose surface is a
torus. Its annular shape is generated by revolving a circle around an axis external to the circle.
A coil of insulated
wire in a doughnut or pretzel shape is an example of a toroidal object. These are used as
inductors in circuits such as low frequency transmitters and receivers because they possess higher
inductance and carry greater current than similarly constructed
solenoids. They are also used as
transformers in main power supplies. Toroidal coils reduce
resistance, due to the larger diameter and smaller number of turns in the winding. The magnetic flux in a toroid is confined to the core, preventing its energy from being absorbed by nearby objects.
In the geometry of torus-shaped magnetic fields, the
poloidal flux direction threads the "donut hole" in the center of the torus, while the
toroidal flux direction is parallel the core of the torus.
In fluid mechanics, a toroid-shaped flow is called a
vortex ring.
See also
Patents
Potthoff,
Toroidal core winder. November 28, 1978.
Toroidal shaped closed chamber whistle. February 7, 1984.
Toroidal whistle. August 18, 1987.
External links
