Bifilar
Bifilar (from Latin bi for 'two', filum for 'thread') is part of object names in which two threads, fibers, wires etc. are of essential importance.
Electrical engineering
In electrical engineering , a bifilar coil or winding is a two-wire coil, that is, a coil wound from a pair of wires (enamelled copper wire , enamel- insulated tape or resistance wire) .
If the current flows in opposite directions, the two resulting magnetic fields almost cancel each other out. Bifilar winding is used, for example, to produce wirewound resistors with very small parasitic inductance . The current flows back and forth through the bifilar wire.
If, on the other hand, the two wires are used as separate windings of a transformer, they have a particularly low leakage inductance . Transformers made bifilar or “n-filar” have a particularly good impulse transmission behavior and are used, among other things, as coupling transformers for the isolated control of transistors. In these, each winding is formed from one of the wires that are laid parallel to one another or even twisted together . However, with this design, the parasitic coupling capacitance between the closely adjacent windings increases.
mechanics
In mechanics one understands under a bifilar suspension the attachment z. B. a pendulum body on two threads, so that the pendulum body can only oscillate in one plane.