Homemade oscilloscope current probe developed successfully: measuring STM32 FOC motor board

music_586

Homemade oscilloscope current probe developed successfully: measuring STM32 FOC motor board [Copy link]

 

Homemade oscilloscope current probe developed successfully: measuring STM32 FOC motor board

Measured the starting current waveform, the effect is OK; the highest frequency is 200K;

This content is created by EEWORLD forum user music_586. If you need to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source

music_586

29447945

Mr. You is really awesome. He did everything by himself. He won't be afraid of running out of tools anymore.

gmchen

Does it need to be connected in series in the current loop?

cruelfox

Current transformer

philipchiu

It's quite professional.

music_586

29447945 Published on 2019-5-23 18:54 You Zong is really awesome. He did everything by himself. I don't need to worry about running out of tools anymore

There are also isolated DCDC power supplies, isolated 485 modules, isolated CAN modules, and isolated CANFD modules. They will all be open sourced later.

music_586

gmchen posted on 2019-5-23 21:57 Do I need to connect it in series in the current loop?

It is not necessary to use a transformer

music_586

cruelfox posted on 2019-5-24 14:26 Current transformer

Yes

music_586

philipchiu posted on 2019-5-24 16:54 It's quite professional

I just did it for fun;

gmchen

music_586 posted on 2019-5-24 22:01 It is not necessary to use a transformer

I understand. It turns out that the black box is a magnetic ring. I didn't understand it at first and thought that the circuit was installed in this shell

徐少雄

This can only test AC current. It can't test DC current, right?

music_586

Xu Shaoxiong posted on 2019-5-28 14:09 This can only test AC current. It can't test DC, right?

Yes, you need to change the probe that supports DC.

wspytu

Mr. You, can you share the schematic diagram and BOM of the oscilloscope current probe?

newdrive

sharp!

music_586

wspytu posted on 2019-6-24 14:18 Mr. You, can you share the schematic diagram and BOM of the oscilloscope current probe?

Already shared, please contact me on QQ: 103472959

music_586

Thanks for the support

Farmer_one

It would be great if Hall could be added to measure superimposed DC!

music_586

Farmer_one posted on 2019-7-12 15:25 It would be great if Hall sensors could be added to measure superimposed DC!

Just replace the transformer