I have a question only you can answer me,(i think&hope): About hv ceramic capacitors: Is that voltage-depending capacity a positive or a negative influence? I ask in use in a pair of capacitors in series to share the max voltage over both of them. I know that when the capacities are not exactly the same the (ac+dc) comes mostly on the least capacityvalue. And if the dc component gets close to the max then that value will increase or decrease? So will the situation hv-C's in serie be self-correcting ór will it be negative so the C-value decrease and thus the total voltage increase more&more till one of the C's in series will blow up?(i dont know the english for every thing but i still hope that you see my question and know an answer for me? At least then i know more before spending more of my expesive 4n7@20kV C's! (you see i dont ask ónly for curiousity but for sake of my most beloved&most longtime built too)
Hi Rob To begin with two caps in series do not form a voltage divider. See.: ua-cam.com/video/T8qWWwsMOK8/v-deo.html. You need to parallel each cap with a (large) resistor to ensure stable voltage division.
@@sambenyaakov i know, but sinds your videolesson about the voltage dependency of ceramic capacitors, i worry a little about a voltagemultplier i am building. Is the total effect of that effect, will it be in the selfcorrecting direction working, or is it in the runawaydirection? I could buy 20kV capacitors and worry if i indeed could not do without resistors parallel to each capacitor. You see that would be a very difficult resistor. Two same 4n7@20kV ceramic capacitors in series (its in a woltoncronkfortmultiplier, i have to feed with 17kVtoptop@12kHz). That voltagedepending effect, will it about the max voltage, will the total voltage increase by that one capacitor who's capacity drops the earliest? (I cannot be sure because i can see both directions possible and i mis the insight needed to get sure.)
@@sambenyaakov thank you só much for again your helpfull answer. I never forget my trafo-debacle where my schoolteachers could never make it clear enough for me. It stayed a break in my understanding, until decades later, when colleges who knew youtubechannel pointed me to your videolessons to improve our skills and knowledge for your easier to understand explainings or what i more&more think are your teachingskills or at least your own easy understanding&insights that i think is what makes your words so much more easy or better to follow. O i am totally nót good in social-normal speak, but for me your knowledgespreading, your videolessons, it really helped me and others to find and learn that next level understanding... Your understanding&insightslearningchannel made more difference than some of that most beloved books. Thank you really, for uploading your knowledge.(ow that last scentence sounds even more abnormal than the rest of my aspergerautismespeaking!) I wish to say only: thank you for your inspiring, interesting and usefull videolessons.(at least much more than í can explain. So thank you great
Very interesting as usual, thanks again, also the differential measurement with core concentration is used in UNI-T UT210E clamp meter which is surprisingly accurate even in DC measurements. See another favorite youtuber taking it apart ua-cam.com/video/m7cD_W3cQlE/v-deo.html
You say Hg will be much higher than Hf, agree. And B is the same, in the gap and in the core, agree too. But hall effect is made by B vector, not H. And hall effect ICs 'feel' B vector, in magnitude up to 0.2T. So the fact that Hg>>Hf is not what the concentrator was made for. As I understand, its role is to increase B value, that in absence of concentrator will be much lower and harder to measure. Also small gap will help to isolate external parasityc magnetic fields.
Thank you! As always - amazing presentation. Looking forward for next topic!
👍
Hi thanks for your presentation. I sincearly admire your hard work in learning those concepts and presenting them to the world.
Thanks for taking the time to write the comment which with others keeps me going.
Thank you this is really useful!
🙏🙂
Thank you sir, this is really useful!! But at 14 minutes and 19 seconds of the video, I calculated that it was B=4IG
You are correct. I am not using a calculator, and sometime I miss😊Thanks for correction.
RATED: 🍿🍿🍿🍿🍿
InTeReStInG. Thank you!
I have a question only you can answer me,(i think&hope):
About hv ceramic capacitors:
Is that voltage-depending capacity a positive or a negative influence?
I ask in use in a pair of capacitors in series to share the max voltage over both of them. I know that when the capacities are not exactly the same the (ac+dc) comes mostly on the least capacityvalue. And if the dc component gets close to the max then that value will increase or decrease? So will the situation hv-C's in serie be self-correcting ór will it be negative so the C-value decrease and thus the total voltage increase more&more till one of the C's in series will blow up?(i dont know the english for every thing but i still hope that you see my question and know an answer for me? At least then i know more before spending more of my expesive 4n7@20kV C's!
(you see i dont ask ónly for curiousity but for sake of my most beloved&most longtime built too)
Hi Rob
To begin with two caps in series do not form a voltage divider. See.: ua-cam.com/video/T8qWWwsMOK8/v-deo.html. You need to parallel each cap with a (large) resistor to ensure stable voltage division.
@@sambenyaakov i know, but sinds your videolesson about the voltage dependency of ceramic capacitors, i worry a little about a voltagemultplier i am building.
Is the total effect of that effect, will it be in the selfcorrecting direction working, or is it in the runawaydirection?
I could buy 20kV capacitors and worry if i indeed could not do without resistors parallel to each capacitor. You see that would be a very difficult resistor.
Two same 4n7@20kV ceramic capacitors in series (its in a woltoncronkfortmultiplier, i have to feed with 17kVtoptop@12kHz).
That voltagedepending effect, will it about the max voltage, will the total voltage increase by that one capacitor who's capacity drops the earliest? (I cannot be sure because i can see both directions possible and i mis the insight needed to get sure.)
I do not think there is a problem if same capacitors are put in series.
@@sambenyaakov thank you só much for again your helpfull answer. I never forget my trafo-debacle where my schoolteachers could never make it clear enough for me. It stayed a break in my understanding, until decades later, when colleges who knew youtubechannel pointed me to your videolessons to improve our skills and knowledge for your easier to understand explainings or what i more&more think are your teachingskills or at least your own easy understanding&insights that i think is what makes your words so much more easy or better to follow. O i am totally nót good in social-normal speak, but for me your knowledgespreading, your videolessons, it really helped me and others to find and learn that next level understanding... Your understanding&insightslearningchannel made more difference than some of that most beloved books.
Thank you really, for uploading your knowledge.(ow that last scentence sounds even more abnormal than the rest of my aspergerautismespeaking!)
I wish to say only: thank you for your inspiring, interesting and usefull videolessons.(at least much more than í can explain. So thank you great
Thankyou sir...
Could you please make a video that can defferntiate between inductor and transformer..
See ua-cam.com/video/3nfqBzPMknY/v-deo.html ua-cam.com/video/6Mi8QDD71vE/v-deo.html
Very interesting as usual, thanks again, also the differential measurement with core concentration is used in UNI-T UT210E clamp meter which is surprisingly accurate even in DC measurements.
See another favorite youtuber taking it apart
ua-cam.com/video/m7cD_W3cQlE/v-deo.html
Thank for comment and link
You say Hg will be much higher than Hf, agree. And B is the same, in the gap and in the core, agree too. But hall effect is made by B vector, not H. And hall effect ICs 'feel' B vector, in magnitude up to 0.2T. So the fact that Hg>>Hf is not what the concentrator was made for. As I understand, its role is to increase B value, that in absence of concentrator will be much lower and harder to measure. Also small gap will help to isolate external parasityc magnetic fields.
You seem to have missed the point. Compared to air {no concentrator) the Bg with the concentrator will be higher because Hg is higher.