Bifilar coil

Bifilar (from Latin bi for 'two', for filum, thread ') is part of object descriptions, in which two threads, fibers, wires, etc. are essential.

Electrical Engineering

In electrical engineering, a bifilar coil or winding is a two-wire, that is of a pair of wires ( copper wire, insulated tape or paint resistance wire ) wound coil.

In gegensinnigem current flow, the two resulting magnetic fields cancel each other out almost. Bifilar winding way is used, for example to produce wire wound resistors with very low parasitic inductance. Here, the current flows through the bifilar wire laid back and forth.

In contrast, if the two wires are used as separate windings of a transformer, they have a particularly low leakage inductance. Bifilar or transformers ' n- filar " have produced a particularly good pulse transmission characteristics and are used among other things as a coupling transformer for electrically isolated control of transistors. In these each winding from one of the parallel displaced or even twisted together wires is formed. However, in this construction, the parasitic coupling capacitance increases between such closely spaced windings.

Mechanics

The mechanism is meant by a bifilar attachment, for example, of a suspension pendulum with two threads so that the pendulum body can swing only in a plane.