What are the factors related to the inductance of the air-core inductor? And what is its calculation formula?

1. The formula for calculating the inductance of the air-core inductor: First use a piece of paper to make a small cylinder, and then wind an inductance coil on the cylinder to make an air-core inductor. The calculation formula for the air-core inductance is: LmH)=(.08DD.N.N/(3D+9W+10H) 1. This can calculate the number of turns of the winding inductance:

Number of turns = [inductance * {(18* diameter of the turn (inch)) + (40 * length of the turn (inch)))]? Diameter of the turn (inch)

Number of laps = [8.116 * {(18*2.047) + (40*3.74)}]? 2.047 = 19 laps

According to the above points, the number of coils can be calculated:

Number of turns = [inductance * {(18* diameter of the turn (inch)) + (40 * length of the turn (inch)))]? Diameter of the turn (inch)

Number of laps = [8.116 * {(18*2.047) + (40*3.74)}]? 2.047 = 19 laps

Air core inductance calculation formula: L(mH)=(0.08D.D.N.N)/(3D+9W+10H)

D——coil diameter

N——number of coil turns

d—–wire diameter

H—-coil height

W—-coil width

2. Calculation formula of air-core inductance coil:

1. For circular CORE, the following formula can be used: (IRON)

L=N2. AL L= inductance value (H)

H-DC=0.4πNI / l N= Number of coil turns (turns)

AL = inductance

H-DC = DC magnetizing force I = passing current (A)

l= Magnetic circuit length (cm)

l and AL value, please refer to Micrometal comparison table. For example: Take T50-52 material with 5 and a half coils, and its L value is T50-52 (indicating OD is 0.5 inches), and its AL value is about 33nH after checking the table.

  L=33．（5.5）2=998.25nH≒1μH　

3. What are the factors related to the inductance of the air-core inductor?

1. The inductance of the air-core inductor mainly depends on factors such as the number of turns of the coil, the magnetic flux of the permeable magnet and the winding method. How to increase the inductance? Inductance L=N squared/Magnetic resistance Rm.

1. The inductance of the air-core inductor mainly depends on factors such as the number of turns of the coil, the magnetic flux of the permeable magnet and the winding method. How to increase the inductance? Inductance L=N squared/Magnetic resistance Rm.

1: Reduce the length of the coil-make the coils tightly arranged

2: Increase the coil area (note that it is not the wire area).

3: Increase the permeability-replace the magnetic core (you can check the table to know the relative permeability of a certain material)

Summary: What factors are related to the inductance of the air-core inductor above? I hope to be helpful!