# Basket winding > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Basket_winding > Markdown URL: https://mediated.wiki/source/Basket_winding.md > Source: https://en.wikipedia.org/wiki/Basket_winding > Source revision: 1349727321 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Winding method}} [[File:Kreuzwickelspule.png|thumb|Basket winding made with [litz wire](/source/litz_wire) in an IF transformer]] '''Basket winding''' (or '''basket-weave winding''' or '''honeycomb winding''' or '''scatter winding''') is a winding method for [electrical wire](/source/electrical_wire) in a coil. The winding pattern is used for radio-frequency [electronic component](/source/electronic_component)s with many parallel wires, such as [inductor](/source/inductor)s and [transformer](/source/transformer)s. The winding pattern reduces the amount of wire running in adjacent, parallel turns. The wires in successive layers of a basket wound coil cross each other at large angles, as close to 90 degrees as possible, which reduces energy loss due to electrical cross-coupling between wires at radio frequencies. ==Purpose== The '''basket winding''' method is used for coils designed for use at [frequencies](/source/frequency) of 50 kHz and higher to reduce two undesirable side effects, ''[proximity effect](/source/Proximity_effect_(electromagnetism))'' and ''[parasitic capacitance](/source/parasitic_capacitance)'', that arise in long parallel segments of current-carrying wire. [The proximity effect](/source/Proximity_effect_(electromagnetism)) is caused in a wire by the magnetic field from current flowing in nearby parallel wires, such as other loops in the same coil. If two adjacent wires carry a current in the same direction, then the effect is felt in both – the magnetic field of the nearby wires causes current in each wire to be concentrated in a small region on the wire’s surface farthest from the adjacent wires. The concentration of current along a small portion of the conductor increases the wire’s [resistance](/source/electrical_resistance) and hence increases energy loss. At [medium](/source/medium_frequency) and [high](/source/high_frequency) radio frequencies the increased resistance of the inductor can increase the [bandwidth](/source/Bandwidth_(signal_processing)) of [tuned circuit](/source/tuned_circuit)s and reduce the circuit’s frequency selectivity, or [Q factor](/source/Q_factor). [Parasitic capacitance](/source/Parasitic_capacitance) is the consequence of parallel turns of wire acting as [capacitor](/source/capacitor) plates, storing [charge](/source/electric_charge) between adjacent wires. The parasitic capacitance can cause the coil to become [self-resonant](/source/self-resonant_frequency) at one or several frequencies, which interferes with the intended tuned resonance and blocks and reflects current at the self-resonant frequency. Unfortunately basket-weave coil winding increases the physical size of the coil, which increases [leakage inductance](/source/leakage_inductance). ==Methods== Basket windings are often wound with [Litz wire](/source/Litz_wire), a thin, multi-strand wire with each strand individually insulated, which further reduces losses. Cotton or fabric insulation is important from a mechanical point of view during the winding process, because a common enameled [magnet wire](/source/magnet_wire) does not provide sufficient surface friction between coil layers to hold the turns at large angles.{{Cite web|url=http://info.ee.surrey.ac.uk/Workshop/advice/coils/winders/wave/index.html|title=The Wave Winder|access-date=2010-01-11|archive-date=2020-01-21|archive-url=https://web.archive.org/web/20200121095606/http://info.ee.surrey.ac.uk/Workshop/advice/coils/winders/wave/index.html|url-status=dead}} thumb|Crystal radio with basket-wound coil ==See also== * [Ayrton–Perry winding](/source/Ayrton%E2%80%93Perry_winding) * [Bifilar winding](/source/Bifilar_winding) * [Inductor](/source/Inductor) ==External links== * [http://info.ee.surrey.ac.uk/Workshop/advice/coils/winders/wave/index.html Photo and description of basket winding] {{Webarchive|url=https://web.archive.org/web/20200121095606/http://info.ee.surrey.ac.uk/Workshop/advice/coils/winders/wave/index.html |date=2020-01-21 }} ==References== {{reflist}} Category:Electromagnetic coils --- Adapted from the Wikipedia article [Basket winding](https://en.wikipedia.org/wiki/Basket_winding) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Basket_winding?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.