1 Motor 1 Scope - brushless motor, oscilloscope, and a cordless screwdriver

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FPV University

FPV University

Күн бұрын

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@power-max
@power-max 4 жыл бұрын
All you would need to do is connect 3 1K resistors between the 3 phases and create a virtual ground. The resistors do add a load of 1000 ohms to the 3 phases, however.
@baxbanni2226
@baxbanni2226 7 ай бұрын
I like your hands-on engineering! 👍👍
@lasersbee
@lasersbee 4 жыл бұрын
You could extrapolate the RPM of the motor by the Frequency of the waves.
@sjeses
@sjeses 4 жыл бұрын
(1/wave time)*60 = RPM
@carbidedge
@carbidedge 4 жыл бұрын
Super, More videos like this please, Pawel.
@dutchmetalmaniac
@dutchmetalmaniac 4 жыл бұрын
a new use for my scope. (now i can measure my wind generators 👍) NICE
@pablofpv
@pablofpv 4 жыл бұрын
Nice scope, I did similar experiments a while back and also used a drill at a known RPM and voltage output of each coil to calculate the Kv of my motors and also some I rewound by hand.Surprisingly accurate enough ,I was basically trying to lower the Kv of motors I had and it did work ,but it was a lot of effort!There are links to video's if you search for radiocontrolinfo/Brushless Motor Kv - Measure a Motor’s Kv 😀
@tomascancelliere4348
@tomascancelliere4348 11 ай бұрын
Can you share all your important settings for doing this?
@marhar2
@marhar2 4 жыл бұрын
I would like a video on determining kvm. I have some old motors given to me and would find it very useful to know. (BTW I have the same scope as Pawel. Therefore I am cool!)
@Siamect
@Siamect 4 жыл бұрын
You don't need a tacho. You see the frequency on the scope.
@kennethholland1502
@kennethholland1502 4 жыл бұрын
Exactly
@FPVUniversity
@FPVUniversity 4 жыл бұрын
and some math since electrical RPM is not the sam as physical one. For the simplicity of the video I just ignored that
@HERSDT_FPV
@HERSDT_FPV 4 жыл бұрын
​@@FPVUniversity what?electrical RPM? is not rpm on oscilloscope .
@sjeses
@sjeses 4 жыл бұрын
@@FPVUniversity there is a phase shift, but the frequency is related to how many magnets pass the coil in one rotation
@typxxilps
@typxxilps 2 жыл бұрын
Could you check all 3 phases at once if you would power the oscilloscope from a battery ? then it should be floating and no ground at all, therefore no short possible - or did I make a mistake ? thx, great idea, will try that out when my loto OSC482 will arrive or tomorrow when I am back in the shed and have the owon vds1022i which has an isolated channel and is battery powered by the tablet connected, but just 2 channel only and the older 8'' android tablet running android 6 for the hscope app.
@MCsCreations
@MCsCreations 4 жыл бұрын
Pretty interesting, Pawel!!! 😃 There's a video from Great Scott! where he modified a brushless motor to use as a crank generator. Didn't work very well. 😬 Anyway, stay safe there with your family! 🖖😊
@wavesummit
@wavesummit 4 жыл бұрын
Interesting, ive been dealing with a noise on throttle issue, tried LC filters, different capacitors, 12v linear board. Tried two rush vtx, changed the FC from clracing to matek F7. Replaced the hakrc blheli32 with a GS spedix. The issue still persisted. As a last resort I swapped the emax ls 2400kv motor with an old racerstar motor and the noise was gone. After seeing your video I wonder if something went wrong with the motor wires, wonder if I could see something wrong on the oscilloscope by using a drill and turning it like you did.
@LydellAaron
@LydellAaron 3 жыл бұрын
What model of drill do you have? Online suggests typical cordless drills to output 500 to 2000 RPM. I estimate your motor around 1000-2000KV?
@FPVUniversity
@FPVUniversity 3 жыл бұрын
The drill is some cheap Bosch. No idea about the model. And motor is 950KV IIRC
@mattraymond2935
@mattraymond2935 4 жыл бұрын
ESC testing on O scope?
@HERSDT_FPV
@HERSDT_FPV 4 жыл бұрын
Why you need thaometer if you have oscilloscop? Just frequency divide by number of magnets
@specialseraphim
@specialseraphim 2 жыл бұрын
can we please try this for an esc, so that we could actually see the pwm waveforms?🥺
@FPVUniversity
@FPVUniversity 2 жыл бұрын
The thing is, that you will not really see waveforms you expect. Scope will show both PWM signal and back-emf. Tried that, huge mess
@IanF-FPV
@IanF-FPV 4 жыл бұрын
I hope Bosch is sponsoring this video🤔🤭
@tinochoolun4397
@tinochoolun4397 3 жыл бұрын
to pawel nice vdo and explanation also . so i have a question for you what happen if one coil in one phase is missing [burn out] any reply is welcome good job man
@yakubyusuf1648
@yakubyusuf1648 4 жыл бұрын
Can someone tell me the frequency
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