Inductor core loss calculator is wrong?

[cupoftea]

Hi,
I just put the SLF10145T-101M1R0 inductor into the TDK core loss calculator...well, the "loss calculator"

https://product.tdk.com/en/search/inductor/inductor/smd/core_loss_simulation

...for Boost, 60kHz, 12vin, 16vout, 0.5A out, (temp 30c)....it calculates 150mW total loss.......but that is just the conduction loss...what about the core loss?....am i missing something?

 

[Easy peasy]

you are missing the dis-ingenuousness of the supplier ....

consider the Rwdg goes up 30% from 25 degC to 100 deg C, for starters, hence I^2R goes up 30% over this range.

The core losses are likely to be larger than hoped for.

For 0.5A out ave, spec at least a 1A part, 2A for 20-30 degC rise ...

 

[mtwieg]

I haven't found a vendor core loss calculator worth trusting so far. Best I've seen IMO is Wurth's REDEXPERT. Overall I've found their calculations reasonable, though I haven't really validated any of them. But for some parts (especially large wirewound inductors) it's easy to determine the core geometry and number of turns, and thus the dB, and putting in realistic material properties gives results similar to their tool. Plus REDEXPERT has a fairly good UI.

As for temperature rise estimates, I never trust those numbers.

 

[Velkarn]

but that is just the conduction loss...

simple calc gives conduction loss: 0,1W for nominal dcr, 0,12W for max dcr

--- Updated May 31, 2022 ---

so 0.05 to 0.03 for core loss