Coreless Hall effect current sensors

[@АджайАли]

It's ridiculous how I've been thinking on this subject whole last week and here comes your video.. Just reading my mind! Thanks a lot professor.

[@sambenyaakov]

🙂👍Happy to be of help

[@aiswaryaremesh4735]

I was working on this today.You are my saviour 😀😀.

[@sambenyaakov]

Thanks. 🙂Happy to be of help

[@falconhawker]

Again ! Professor Nen_Yaakov has opened my mind !

[@sambenyaakov]

🙂🙏

[@UnBOXTopicz]

Thank you for this great video. Quick question, where does it specify the proportional output current information. For instance: -400A = 4mA, 400A = 20mA. This is what i dont understand and it seems that datasets does not cover this in plain sight.

[@sambenyaakov]

Please indicate to which slide or minute in the video you are referring to.

[@UnBOXTopicz]

@sambenyaakov basically a general question. Like in datasheet for instance, I was looking for proportional values of thr current reading. So if we know that the current we are measuring is 100A. How does thr current hall sensor output this value in proportion if that make sense. And how does it calculate and output. Sorry for being confusing 😕

[@sambenyaakov]

@UnBOXTopicz The current generates a magnetic field H that induces a a magnetic flux B that is read by the Hall sensor.

[@bharathy2117]

Hall effect sensor, bus bar dimensions l=15mm and while substituting l=50mm, could you pls tell which length we need to use?

[@sambenyaakov]

I am afraid I don't follow your question.

[@tamaseduard5145]

👍💪🙏

[@sambenyaakov]

👍🙂🙏

[@al-moutaz-billah]

You didn't mention anything about the magnetic orientation of the crosstalk field, it is very important, even the FEMM program can't give you separate measurements of the field orientation. If the crosstalk field is perpendicular to the sense direction of the IC, then no effect will happen as far as I understand.

[@sambenyaakov]

Thanks. You are correct. I have not emphasized this. Yes, crosstalk means that the interfering field has a component in the sensing direction.

[@al-moutaz-billah]

@@sambenyaakov Thanks for being so open to my note like this, in the end the video was so informative and helped me so much, please keep going :)

[@udhayakumara4033]

Thanks professor. Can we use rogowski coil in the place of hall sensor. I know it will be bulky, but we can make it as a flexible and cable tie type of sensor. No saturation and high frequencies are possible. Can you make a video about this.

[@sambenyaakov]

Rogowski current sensing is great. But, being based on Farady's law, it is blind to the DC. This is unacceptable in many cases. A video on this method is a good idea. I will try.

[@udhayakumara4033]

@@sambenyaakov Thank you. I can understand. I suggested rogowski coil because we discussed about busbar current sensing where we have mostly AC current. Another one beautiful application Note available in Ti with DRV425 fluxgate current sensor IC specifically for busbar current sensing where they are completely avoid the surrounding magnetic field. You can look in to that. In that method AC/DC current sensing is possible.

[@piotrwyderski7848]

@@sambenyaakov There are many attempts to combine the Rogowski with Hall sensors into a composite high bandwidth sensor capable of DC sensing. There is also some exotica: Neel effect sensors and saturable reactors.

[@sambenyaakov]

@@udhayakumara4033 There is of course a DC busbar too. But I would be hesitant to use a Rogowski sensor for the phase curent since it may produce offsets during transients.