Kort beskrivning:

Med mer än 100 automatiska lindningsmaskiner i vår fabrik kan vi säkerställa en snabb ledtid och produktkvalitet.

Ge oss bara grundstorleken, tråddiametern och svängförfrågan, vi kan spola allt som passar dig.



Air coil modellerar en luftkärnspoleinduktor med centrerade axiella ledningar. Spol- och ledningsmått kan konfigureras.

Vi har exporterat den här typen av SMD-induktorspole till USA, Storbritannien, Tyskland, Korea och Kanada.


1. Anpassad enligt din unika begäran

2.Mycket hög precision

3. Alla produkter 100% testade

4. Bygg för att bekräfta ROHS-kompatibla

5. kort ledtid och snabbt prov

6. Välj och placera processen möjlig

7. Bra lödbarhet (tennade kontaktstift)

8.Tape & Reel förpackning

Storlek och mått:

Size and dimensions

ID + 0,1 / -0,05 TURNS



C ± 0,2





1. 5


namn Beskrivning
ID Underkrets-ID
NETTO Subcircuit namn
* M Multiplikationsfaktor - används inte för den här modellen
NTurns Antal svängar
WireDia Trådens diameter
CoilDia Spolens innerdiameter
Tonhöjd Avstånd mellan varv, mätt från tråd centrum till centrum
LeadLen Blyans längd
Leda bort Förskjutet avstånd mellan spiralkroppen och ledningens början
LeadType Typ av ledningskontakt: 0 = rund stolpe, 1 = botten platt flik, 2 = upphöjd platt flik
TabLenRatio Ratio of tab length to total lead length for LeadType=1 or 2. 0<TabLenRatio<1
Rho Bulk resistivity of conductor metal normalized to gold


1. Satellite communication systems

2. Test equipment and microwave equipment

3.Television circuits.

4.Transmitters and band pass filters.

Do you need an air coil?

What are the advantages of an air core coil?

Its inductance is unaffected by the current it carries. This contrasts with the situation with coils using ferromagnetic cores whose inductance tends to reach a peak at moderate field strengths before dropping towards zero as saturation approaches. Sometimes non-linearity in the magnetization curve can be tolerated; for example in switching converters. In circuits such as audio cross over networks in hi-fi speaker systems you must avoid distortion; then you need an air coil. Most radio transmitters rely on air coils to prevent the production of harmonics.

Air coils are also free of the ‘iron losses’ which affect ferromagnetic cores. As frequency is increased this advantage becomes progressively more important. You obtain better Q-factor, greater efficiency, greater power handling, and less distortion.

Lastly, air coils can be designed to perform at frequencies as high as 1 Ghz. Most ferromagnetic cores tend to be rather lossy above 100 MHz.

And the ‘downside’?

Without a high permeability core you must have more and/or larger turns to achieve a given inductance value. More turns means larger coils, lower self-resonance and higher copper loss. At higher frequencies you generally don’t need high inductance, so this is then less of a problem.

Greater stray field radiation and pickup. With the closed magnetic paths used in cored inductors radiation is much less serious. As the diameter increases towards a wavelength (lambda = c / f), loss due to electromagnetic radiation will become significant. Balanis has the gory details. You may be able to reduce this problem by enclosing the coil in a screen, or by mounting it at right angles to other coils it may be coupling with.

You may be using an air cored coil not because you require a circuit element with a specific inductance per se but because your coil is used as a proximity sensor, loop antenna, induction heater, Tesla coil, electromagnet, magnetometer head or deflection yoke etc. Then an external field may be what you want.

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