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Areas exceeding saturation flux density in FEM simulation
Hello folks,
i have got a question for which i didnt find a satisfying answer yet.
If a magnetic material is specified with a maximum flux density of lets say 1.6T and in the simulation only a few inner spots of the core have a density...
perfect, thanks for your help.
whioch type of wire would you recommend for a 15mm² total crosssection in terms of single strand diameter? i think going higher than 0.2mm per strand will make the wire very stiff and hard to wind around the core.
i found silicone insulated fibre cables like this...
Its about 10% of nominal current so 5A. If the resistance of the total winding is about 5mohm with termination than the 5A would see 15mohms AC resistance resulting in about 0.4W instead of 0.125W which is absolutely no problem. Is this assumed correctly this way?
Is Litzwire neccessary in AC-Inverter inductor application at 20kHz
Hello guys,
we are building an AC-Inverter Inductor for 20kHz switching frequency.
As i found out, for the given crosssection of 15mm² the resistance would be 3 times higher than when using a "solid" wire than using 33 to 36...
Hello guys,
we accomplished to sort out the problem. It was the 24V isolated supply for the high-side running under the Si8233 case and the tracks were located to close to the input side on the left. We saw this issue when we purchased SiLabs demoboards which have the left and right side of the...
Thanks again for replying,
we pull gate to negative 5V for turn-off Klaus. We installed the beads because an application note suggested that they help when having problems in terms of gate control seeing picture attached.
5V driver supply is coming from a bench supply. We already tried different...
Hello,
we checked the grounds today, absolutely no bounce on them even with high Vds when the problem gets worst. I attached a waveform of PWM and the according gate signal of high- and lowside FET where the upper graph is the lowside (worse) and the lower graph is the highside. Did someone of...
I will post picture of it asap.
Does it make any sense to connect analog and digital ground with inductors like Murata BLM noise suppressors for example?
I read it on stackexchange but there are also many people arguing against it and claiming this solution to be useless and only masking...
Hello guys,
thanks a lot for your fast answer and advice Klaus and FvM.
We also noticed that the DC/DC converter are producing humming noises when the problem with the bad PWM signal occurs, its clearly audible when you get your ear to the RECOM R2S but the 24V isolation voltage remains quite...
Hi guys, we designed a PCB with the formerly mentioned CREE Six-Pack module and 3 pcs. of Si8233 Gate Drivers, one for each phase leg to work as a pure sine wave 50Hz AC inverter. We configured the µC to drive 2 legs in full bridge configuration with filtering inductance and capacitor as well as...
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