cupoftea
Advanced Member level 5
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Hi,
We are doing Boost PFC.
115VAC, 120khz = fsw, 270W = Pout, 390Vout
Inductor is 60 turns of ECW round a micrometals HF130125-2 core. (460uH at zero Amps)
HF130125-2 core (Page 57)
https://www.micrometals.com/design-and-applications/literature/
As you can see, there as a large amount of inductor ripple current at the peak of the mains. dI = 4.1Apkpk and dB = 0.293T (pkpk)
However, the core loss calculation from page 31 of the above Micrometals catalog gives only 137mW of core loss. (and thats an abs max, since as you know, the Bpkpk gets less as one moves away from the mains peak)
Doesn’t this sound just way , way too low?
We are doing Boost PFC.
115VAC, 120khz = fsw, 270W = Pout, 390Vout
Inductor is 60 turns of ECW round a micrometals HF130125-2 core. (460uH at zero Amps)
HF130125-2 core (Page 57)
https://www.micrometals.com/design-and-applications/literature/
As you can see, there as a large amount of inductor ripple current at the peak of the mains. dI = 4.1Apkpk and dB = 0.293T (pkpk)
However, the core loss calculation from page 31 of the above Micrometals catalog gives only 137mW of core loss. (and thats an abs max, since as you know, the Bpkpk gets less as one moves away from the mains peak)
Doesn’t this sound just way , way too low?