# How to measure High-Frequency inductance of inductor using an LCR meter?

I have a High-Frequency inductor available and I want to measure the inductance using the Rohde&Schwarz HM8118 LCR meter. If I change the frequency to 100kHz and voltage level to 1.5V (max) I get a value of 0.5 Henry which is way too high.

User manual of the LCR meter:

The inductor is made of two ferrite cores as shown in for example here:

https://www.picclickimg.com/d/l400/pict/112230606209_/Ferrite-E-Core.jpg

How can I correctly measure the inductance (should get a value in microhenries) ?

EDIT:

Square wave signal of 100kHz is applied across the inductor (having no DC component). The measured inductance value also has a negative sign in front of it.

• Choose f to match nearest fundamental (application) and AC couple with external DC and increase until L drops 10%. If SRF affects Z(f) (i.e. resonant) , L(f) reading will be invalid. Commented Apr 9, 2017 at 11:06
• For my application I am generating a PWM signal with a frequency of 100kHz and after changing it from the default 1kHz I get this huge inductance value. Also, other settings are: BIAS = off, SPD = slow, OPEN = on, SHORT = on and LOAD = off. Any idea? Commented Apr 9, 2017 at 11:12
• Use small signal and large Dc current external It uses CC sine to measure Z . I assume this is for DC application if not scratch that Commented Apr 9, 2017 at 11:16
• Add DC current and AC voltage hysteresis causes correct L reading without DC hysteresis gives too high H. I think it has Ldc port for 100mA only, maybe 200mA. You may want to use lowZ plastic cap external and add X Amps DC to reduce L 10% ( just before saturation) Commented Apr 9, 2017 at 11:24
• Is application Flyback or linear i.e. DCM CCM Commented Apr 9, 2017 at 11:27