Ferrite toroid calculator
Here you can see the formulas that the calculator uses to calculate the inductance. The online calculator uses the wire diameter to determine its length and the possibility of fitting it in the inner diameter of the toroid. The outer diameter of the wire (with insulation) should be using in this calculator. You can download the cross-platform app Coil64 to calculate ferrite toroid inductance coil offline. Here are the Amidon iron powder toroids calculator and the Amidon ferrite toroids calculator.
For correct calculation at radio frequencies, you have to use the real part of the complex magnetic permeability μ' of the ferrite as the relative permeability μr. This value depends on the ferrite material and the frequency. You can use Ferrite toroin inductor at radio frequency online calculator. At low frequencies, provided the coil is operating in weak fields, the initial permeability μi value can be used. These parameters can be found in the manufacturer's datasheets.
- The calculator allows calculating only low-current coils, not a power supply chokes, see more...
- You can determine the unknown permeability of the toroid core by the following calculator.
Calculate number of turns
ENTER THE INPUT DATA:
| Select units: |
| L | = | – Required inductance | |
| OD | = | – Outer diameter of ring | |
| ID | = | – Inner diameter of ring | |
| h | = | – Height of ring | |
| C | = | – Chamfer | |
| µr | = | – Relative magnetic permeability | |
| d | = | – Diameter of wire without insulation | AWG |
| N | = | – Number of turns |
| AL | = | – Inductance factor of the ring [nH/N2] |
| Lw | = | – Required length of wire* |
*Necessary for winding wire length without the leads. The inductance of the coil on the toroidal ferrite core does not depend on the wire diameter. This parameter is necessary to estimate the possibility of fitting the winding in the inner diameter of the ring.
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I am a beginner in electronics, so i try to learn. I am making now a voltage booster with a PWM. I need 12 till 36volts. After blowing up a lot of components i managed to get a voltage from between the 40 and 100 volts. But when i lower the windings the voltage goes up, and i thought it should go down then. What do i do wrong? Or must i make more windings? I hope somebody can help me out with this because the circuit finaly works, just the voltage i am fighting with.
When you remove windings you will have a lower inductance and therefore the current will be higher. If you want to lower the current you must add more windings to the toroid core. (Also a newbie!)
I want to made a 1.5 mH inductor for a buck converter 110v 60A
If you can Please help me to calculate:
1-diameter of wire
2-diameter of core
3-height of core
For air or ferrit
Thanks
Yours sincerely Mohammad