Spole krydsvikling

Ferritantennens højre spole er med krydsvikling.

spole krydsvikling er en metaltrådsviklemetode, som anvendes i radiofrekvensspoler og transformatorer i stedet for mange parallelle vindinger. Krydsviklemønsteret reducerer mængden af tråd som løber parallelt. Trådene i forskellige lag med krydsvikling krydser hinanden med stor vinkel, så tæt på 90 grader som muligt, hvilket også reducerer energitab grundet elektrisk krydskobling mellem trådene ved radiofrekvenser.^[1]

Formål

Krydsviklingsmetoden anvendes til spoler designet til brug ved frekvenser fra 50 kHz og højere for at reducere to uønskede bieffekter, proksimitetseffekt og parasitisk kapacitans, som opstår i parallelle vindinger.^[1]^[2]

Metoder

Krydsvikling kombineres ofte med litzetråd for frekvenser mellem 10 kHz - 1 MHz, en leder bestående at mange tynde individuelt isolerede tråde, hvilket yderligere reducerer tab.^[3]^[4]

Se også

Referencer

^ ^a ^b pa2mrx.nl: Basket/spiderweb coil design Citat: "...These coils were made because of their low own capacitance, this gives your coil a higher Q because the windings are further apart from each other, there is more air between the layers...", backup
^ THE SPIDER WEB (or SPIRAL) COIL, by WØXI(112613)(update 080614) Citat: "...This is accomplished by separating adjacent windings by the thickness of one winding. This separation reduces the proximity effect between wires, wherein the closer they are a current in one will increase the resistance of the other...", backup
^ info.ee.surrey.ac.uk: The Wave Winder, backup
^ info.ee.surrey.ac.uk: Power losses in wound components Citat: "...Litz (a contraction of Litzendraht)...Its purpose is to minimize the resistive losses that arise at high frequencies due to skin effect. Litz wire is mostly used within the frequency range 10kHz to 1MHz...", backup

Eksterne henvisninger

Photo and description of basket winding Arkiveret 21. januar 2020 hos Wayback Machine

[pa2mrx-1] 2mrx.nl: Basket/spiderweb coil design Citat: "...These coils were made because of their low own capacitance, this gives your coil a higher Q because the windings are further apart from each other, there is more air between the layers...", backup

[2] THE SPIDER WEB (or SPIRAL) COIL, by WØXI(112613)(update 080614) Citat: "...This is accomplished by separating adjacent windings by the thickness of one winding. This separation reduces the proximity effect between wires, wherein the closer they are a current in one will increase the resistance of the other...", backup

[3] .ee.surrey.ac.uk: The Wave Winder, backup

[4] .ee.surrey.ac.uk: Power losses in wound components Citat: "...Litz (a contraction of Litzendraht)...Its purpose is to minimize the resistive losses that arise at high frequencies due to skin effect. Litz wire is mostly used within the frequency range 10kHz to 1MHz...", backup

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