T
treez
Guest
We all know that in say an offline flyback transformer, we measure the leakage inductance by shorting the secondary and measuring the inductance at the primary.
However, the leakage inductance is typically very small, and simple cheap inductance meters (like the LCR40, below) cannot get an accurate value for leakage inductance like this.
There is another, better way to measure the leakage inductance…that is shown on the top of page 4 of the following……
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.913.7541&rep=rep1&type=pdf
[Doc title = "Analysis and Design of a Single-Phase Tapped-Coupled-Inductor Boost DC–DC Converter"]
Inductance factor k = {L(aid) – L(opp)} / [4 * SQRT(L1L2)]
Then get leakage inductance from L(leak) = L1 (1-k)
So why does no-one measure leakage inductance like this?
LCR40 inductance meter
https://uk.farnell.com/peak/lcr40/atlas-lcr-meter-passive-component/dp/2843468?st=lcr meter
However, the leakage inductance is typically very small, and simple cheap inductance meters (like the LCR40, below) cannot get an accurate value for leakage inductance like this.
There is another, better way to measure the leakage inductance…that is shown on the top of page 4 of the following……
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.913.7541&rep=rep1&type=pdf
[Doc title = "Analysis and Design of a Single-Phase Tapped-Coupled-Inductor Boost DC–DC Converter"]
Inductance factor k = {L(aid) – L(opp)} / [4 * SQRT(L1L2)]
Then get leakage inductance from L(leak) = L1 (1-k)
So why does no-one measure leakage inductance like this?
LCR40 inductance meter
https://uk.farnell.com/peak/lcr40/atlas-lcr-meter-passive-component/dp/2843468?st=lcr meter