Good explanation, especially showing the pulsed waveforms on the oscilloscope. If you zoomed into one waveform on the scope, you could show why it is variable frequency.
I think the motor is not connected here, this is why you can see pwm. The motor is inductive load, so if it will connected, you should see a sinnwave, not the pulses.
Both, an a/c motor is designed to operate at a give Freq/Voltage and if you vary one, you have to vary the other or you get an effect called hysteresis and the motor will saturate and overheat even with no load attached.
@@tahlularose9267 Great answer! Do you have any source/reading material for the answer youve given (what academic field does motor saturation caused by too large of a difference between freq/Volt belong to, i've googled it and nothing comes up)
Just get a fluke, the field piece stuff is trash, I’ve had their meters for ten years and I ended up with flukes which are much higher quality and are so much more capable. If your a professional and do this for a living, the fluke price tag shouldn’t matter
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Good explanation, especially showing the pulsed waveforms on the oscilloscope. If you zoomed into one waveform on the scope, you could show why it is variable frequency.
I think the motor is not connected here, this is why you can see pwm. The motor is inductive load, so if it will connected, you should see a sinnwave, not the pulses.
Tony needs to button up his Arc rated shirt.
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Does the VFD varies the frequency or the voltage? Or both?
Both, an a/c motor is designed to operate at a give Freq/Voltage and if you vary one, you have to vary the other or you get an effect called hysteresis and the motor will saturate and overheat even with no load attached.
@@n8skow You can't vary the Freq. alone of the motor more than about 5% or it will burn up.
@@tahlularose9267 Great answer! Do you have any source/reading material for the answer youve given (what academic field does motor saturation caused by too large of a difference between freq/Volt belong to, i've googled it and nothing comes up)
Use a true RMS meter.
so is the one meter measuring peak voltage ⚡️?
Just get a fluke, the field piece stuff is trash, I’ve had their meters for ten years and I ended up with flukes which are much higher quality and are so much more capable. If your a professional and do this for a living, the fluke price tag shouldn’t matter